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2019-08-15selftests: netdevsim: add devlink regions testsJiri Pirko
Test netdevsim devlink region implementation. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Tested-by: Jakub Kicinski <jakub.kicinski@netronome.com> Acked-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-15selftests: netdevsim: add devlink params testsJiri Pirko
Test recently added netdevsim devlink param implementation. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Tested-by: Jakub Kicinski <jakub.kicinski@netronome.com> Acked-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-15selftests: net: push jq workaround into separate helperJiri Pirko
Push the jq return value workaround code into a separate helper so it could be used by the rest of the code. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-15selftests: net: tcp_fastopen_backup_key.sh: fix shellcheck issueAnders Roxell
When running tcp_fastopen_backup_key.sh the following issue was seen in a busybox environment. ./tcp_fastopen_backup_key.sh: line 33: [: -ne: unary operator expected Shellcheck showed the following issue. $ shellcheck tools/testing/selftests/net/tcp_fastopen_backup_key.sh In tools/testing/selftests/net/tcp_fastopen_backup_key.sh line 33: if [ $val -ne 0 ]; then ^-- SC2086: Double quote to prevent globbing and word splitting. Rework to do a string comparison instead. Signed-off-by: Anders Roxell <anders.roxell@linaro.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-15perf trace: Add --switch-on/--switch-off eventsArnaldo Carvalho de Melo
Just like with 'perf script': # perf trace -e sched:*,syscalls:*sleep* sleep 1 0.000 :28345/28345 sched:sched_waking:comm=perf pid=28346 prio=120 target_cpu=005 0.005 :28345/28345 sched:sched_wakeup:perf:28346 [120] success=1 CPU:005 0.383 sleep/28346 sched:sched_process_exec:filename=/usr/bin/sleep pid=28346 old_pid=28346 0.613 sleep/28346 sched:sched_stat_runtime:comm=sleep pid=28346 runtime=607375 [ns] vruntime=23289041218 [ns] 0.689 sleep/28346 syscalls:sys_enter_nanosleep:rqtp: 0x7ffc491789b0 0.693 sleep/28346 sched:sched_stat_runtime:comm=sleep pid=28346 runtime=72021 [ns] vruntime=23289113239 [ns] 0.694 sleep/28346 sched:sched_switch:sleep:28346 [120] S ==> swapper/5:0 [120] 1000.787 :0/0 sched:sched_waking:comm=sleep pid=28346 prio=120 target_cpu=005 1000.824 :0/0 sched:sched_wakeup:sleep:28346 [120] success=1 CPU:005 1000.908 sleep/28346 syscalls:sys_exit_nanosleep:0x0 1001.218 sleep/28346 sched:sched_process_exit:comm=sleep pid=28346 prio=120 # perf trace -e sched:*,syscalls:*sleep* --switch-on=syscalls:sys_enter_nanosleep sleep 1 0.000 sleep/28349 sched:sched_stat_runtime:comm=sleep pid=28349 runtime=603036 [ns] vruntime=23873537697 [ns] 0.001 sleep/28349 sched:sched_switch:sleep:28349 [120] S ==> swapper/4:0 [120] 1000.392 :0/0 sched:sched_waking:comm=sleep pid=28349 prio=120 target_cpu=004 1000.443 :0/0 sched:sched_wakeup:sleep:28349 [120] success=1 CPU:004 1000.540 sleep/28349 syscalls:sys_exit_nanosleep:0x0 1000.852 sleep/28349 sched:sched_process_exit:comm=sleep pid=28349 prio=120 # perf trace -e sched:*,syscalls:*sleep* --switch-on=syscalls:sys_enter_nanosleep --switch-off=syscalls:sys_exit_nanosleep sleep 1 0.000 sleep/28352 sched:sched_stat_runtime:comm=sleep pid=28352 runtime=610543 [ns] vruntime=24811686681 [ns] 0.001 sleep/28352 sched:sched_switch:sleep:28352 [120] S ==> swapper/0:0 [120] 1000.397 :0/0 sched:sched_waking:comm=sleep pid=28352 prio=120 target_cpu=000 1000.440 :0/0 sched:sched_wakeup:sleep:28352 [120] success=1 CPU:000 # # perf trace -e sched:*,syscalls:*sleep* --switch-on=syscalls:sys_enter_nanosleep --switch-off=syscalls:sys_exit_nanosleep --show-on-off sleep 1 0.000 sleep/28367 syscalls:sys_enter_nanosleep:rqtp: 0x7fffd1a25fc0 0.004 sleep/28367 sched:sched_stat_runtime:comm=sleep pid=28367 runtime=628760 [ns] vruntime=22170052672 [ns] 0.005 sleep/28367 sched:sched_switch:sleep:28367 [120] S ==> swapper/2:0 [120] 1000.367 :0/0 sched:sched_waking:comm=sleep pid=28367 prio=120 target_cpu=002 1000.412 :0/0 sched:sched_wakeup:sleep:28367 [120] success=1 CPU:002 1000.512 sleep/28367 syscalls:sys_exit_nanosleep:0x0 # Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Florian Weimer <fweimer@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: William Cohen <wcohen@redhat.com> Link: https://lkml.kernel.org/n/tip-t3ngpt1brcc1fm9gep9gxm4q@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-08-15perf evswitch: Add hint when not finding specified on/off eventsArnaldo Carvalho de Melo
If the user specifies a on or off switch event and it isn't in the perf.data file, provide a hint about how to see the events in the perf.data evlist: # perf script --switch-on=syscall:sys_enter_nanosleep --switch-off=syscalls:sys_exit_nanosleep ERROR: event_on event not found (syscall:sys_enter_nanosleep) HINT: use 'perf evlist' to see the available event names # # perf evlist sched:sched_kthread_stop sched:sched_kthread_stop_ret sched:sched_waking sched:sched_wakeup sched:sched_wakeup_new sched:sched_switch sched:sched_migrate_task sched:sched_process_free sched:sched_process_exit sched:sched_wait_task sched:sched_process_wait sched:sched_process_fork sched:sched_process_exec sched:sched_stat_wait sched:sched_stat_sleep sched:sched_stat_iowait sched:sched_stat_blocked sched:sched_stat_runtime sched:sched_pi_setprio sched:sched_move_numa sched:sched_stick_numa sched:sched_swap_numa sched:sched_wake_idle_without_ipi syscalls:sys_enter_clock_nanosleep syscalls:sys_exit_clock_nanosleep syscalls:sys_enter_nanosleep syscalls:sys_exit_nanosleep # Tip: use 'perf evlist --trace-fields' to show fields for tracepoint events # # perf script --switch-on=syscalls:sys_enter_nanosleep --switch-off=syscalls:sys_exit_nanosleep sleep 20919 [001] 109866.144411: sched:sched_stat_runtime: comm=sleep pid=20919 runtime=521249 [ns] vruntime=202919398131 [ns] sleep 20919 [001] 109866.144412: sched:sched_switch: sleep:20919 [120] S ==> swapper/1:0 [120] swapper 0 [001] 109867.144568: sched:sched_waking: comm=sleep pid=20919 prio=120 target_cpu=001 swapper 0 [001] 109867.144586: sched:sched_wakeup: sleep:20919 [120] success=1 CPU:001 # Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Florian Weimer <fweimer@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: William Cohen <wcohen@redhat.com> Link: https://lkml.kernel.org/n/tip-iijjvdlyad973oskdq8gmi5w@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-08-15perf evswitch: Move enoent error message printing to separate functionArnaldo Carvalho de Melo
Allows adding hints there, will be done in followup patch. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Florian Weimer <fweimer@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: William Cohen <wcohen@redhat.com> Link: https://lkml.kernel.org/n/tip-1kvrdi7weuz3hxycwvarcu6v@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-08-15perf evswitch: Introduce init() method to set the on/off evsels from the ↵Arnaldo Carvalho de Melo
command line Another step in having all the boilerplate in just one place to then use in the other tools. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Florian Weimer <fweimer@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: William Cohen <wcohen@redhat.com> Link: https://lkml.kernel.org/n/tip-snreb1wmwyjei3eefwotxp1l@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-08-15perf evswitch: Introduce OPTS_EVSWITCH() for cmd line processingArnaldo Carvalho de Melo
All tools will want those, so provide a convenient way to get them. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Florian Weimer <fweimer@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: William Cohen <wcohen@redhat.com> Link: https://lkml.kernel.org/n/tip-v16pe3sbf3wjmn152u18f649@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-08-15perf evswitch: Add the names of on/off eventsArnaldo Carvalho de Melo
So that we can have macros for the OPT_ entries and also for finding those in an evlist, this way other tools will use this very easily. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Florian Weimer <fweimer@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: William Cohen <wcohen@redhat.com> Link: https://lkml.kernel.org/n/tip-q0og1xoqqi0w38ve5u0a43k2@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-08-15perf evswitch: Move switch logic to use in other toolsArnaldo Carvalho de Melo
Now other tools that want switching can use an evswitch for that, just set it up and add it to the PERF_RECORD_SAMPLE processing function. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Florian Weimer <fweimer@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: William Cohen <wcohen@redhat.com> Link: https://lkml.kernel.org/n/tip-b1trj1q97qwfv251l66q3noj@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-08-15perf evswitch: Move struct to a separate header to use in other toolsArnaldo Carvalho de Melo
Now that we see that the simple userspace-based "slicing" of events using delimiter events ("markers") works, lets move it to a separate header to make it available to other tools, next step will be having the switch on/off check done at the PERF_RECORD_SAMPLE processing function moved too. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Florian Weimer <fweimer@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: William Cohen <wcohen@redhat.com> Link: https://lkml.kernel.org/n/tip-z0cyi9ifzlr37cedr9xztc1k@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-08-15perf script: Allow specifying event to switch off processing of other eventsArnaldo Carvalho de Melo
Counterpart of --switch-on: # perf record -e sched:*,syscalls:sys_*_nanosleep sleep 1 [ perf record: Woken up 36 times to write data ] [ perf record: Captured and wrote 0.032 MB perf.data (10 samples) ] # # perf script :20918 20918 [002] 109866.143696: sched:sched_waking: comm=perf pid=20919 prio=120 target_cpu=001 :20918 20918 [002] 109866.143702: sched:sched_wakeup: perf:20919 [120] success=1 CPU:001 sleep 20919 [001] 109866.144081: sched:sched_process_exec: filename=/usr/bin/sleep pid=20919 old_pid=20919 sleep 20919 [001] 109866.144408: syscalls:sys_enter_nanosleep: rqtp: 0x7ffc2384fef0, rmtp: 0x00000000 sleep 20919 [001] 109866.144411: sched:sched_stat_runtime: comm=sleep pid=20919 runtime=521249 [ns] vruntime=202919398131 [n> sleep 20919 [001] 109866.144412: sched:sched_switch: sleep:20919 [120] S ==> swapper/1:0 [120] swapper 0 [001] 109867.144568: sched:sched_waking: comm=sleep pid=20919 prio=120 target_cpu=001 swapper 0 [001] 109867.144586: sched:sched_wakeup: sleep:20919 [120] success=1 CPU:001 sleep 20919 [001] 109867.144614: syscalls:sys_exit_nanosleep: 0x0 sleep 20919 [001] 109867.144753: sched:sched_process_exit: comm=sleep pid=20919 prio=120 # # perf script --switch-off syscalls:sys_exit_nanosleep :20918 20918 [002] 109866.143696: sched:sched_waking: comm=perf pid=20919 prio=120 target_cpu=001 :20918 20918 [002] 109866.143702: sched:sched_wakeup: perf:20919 [120] success=1 CPU:001 sleep 20919 [001] 109866.144081: sched:sched_process_exec: filename=/usr/bin/sleep pid=20919 old_pid=20919 sleep 20919 [001] 109866.144408: syscalls:sys_enter_nanosleep: rqtp: 0x7ffc2384fef0, rmtp: 0x00000000 sleep 20919 [001] 109866.144411: sched:sched_stat_runtime: comm=sleep pid=20919 runtime=521249 [ns] vruntime=202919398131 [n> sleep 20919 [001] 109866.144412: sched:sched_switch: sleep:20919 [120] S ==> swapper/1:0 [120] swapper 0 [001] 109867.144568: sched:sched_waking: comm=sleep pid=20919 prio=120 target_cpu=001 swapper 0 [001] 109867.144586: sched:sched_wakeup: sleep:20919 [120] success=1 CPU:001 sleep 20919 [001] 109867.144753: sched:sched_process_exit: comm=sleep pid=20919 prio=120 # # perf script --switch-on syscalls:sys_enter_nanosleep --switch-off syscalls:sys_exit_nanosleep sleep 20919 [001] 109866.144411: sched:sched_stat_runtime: comm=sleep pid=20919 runtime=521249 [ns] vruntime=202919398131 [n> sleep 20919 [001] 109866.144412: sched:sched_switch: sleep:20919 [120] S ==> swapper/1:0 [120] swapper 0 [001] 109867.144568: sched:sched_waking: comm=sleep pid=20919 prio=120 target_cpu=001 swapper 0 [001] 109867.144586: sched:sched_wakeup: sleep:20919 [120] success=1 CPU:001 # # perf script --switch-on syscalls:sys_enter_nanosleep --switch-off syscalls:sys_exit_nanosleep --show-on-off sleep 20919 [001] 109866.144408: syscalls:sys_enter_nanosleep: rqtp: 0x7ffc2384fef0, rmtp: 0x00000000 sleep 20919 [001] 109866.144411: sched:sched_stat_runtime: comm=sleep pid=20919 runtime=521249 [ns] vruntime=202919398131 [n> sleep 20919 [001] 109866.144412: sched:sched_switch: sleep:20919 [120] S ==> swapper/1:0 [120] swapper 0 [001] 109867.144568: sched:sched_waking: comm=sleep pid=20919 prio=120 target_cpu=001 swapper 0 [001] 109867.144586: sched:sched_wakeup: sleep:20919 [120] success=1 CPU:001 sleep 20919 [001] 109867.144614: syscalls:sys_exit_nanosleep: 0x0 # Now think about using this together with 'perf probe' to create custom on/off events in your app :-) Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Florian Weimer <fweimer@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: William Cohen <wcohen@redhat.com> Link: https://lkml.kernel.org/n/tip-li3j01c4tmj9kw6ydsl8swej@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-08-15perf script: Allow showing the --switch-on eventArnaldo Carvalho de Melo
One may want to see the --switch-on event as well, allow for that, using the previous cset example: # perf script --switch-on syscalls:sys_enter_nanosleep --show-on-off sleep 13638 [001] 108237.582286: syscalls:sys_enter_nanosleep: rqtp: 0x7fff1948ac40, rmtp: 0x00000000 sleep 13638 [001] 108237.582289: sched:sched_stat_runtime: comm=sleep pid=13638 runtime=578104 [ns] vruntime=202889459556 [ns] sleep 13638 [001] 108237.582291: sched:sched_switch: sleep:13638 [120] S ==> swapper/1:0 [120] swapper 0 [001] 108238.582428: sched:sched_waking: comm=sleep pid=13638 prio=120 target_cpu=001 swapper 0 [001] 108238.582458: sched:sched_wakeup: sleep:13638 [120] success=1 CPU:001 sleep 13638 [001] 108238.582698: sched:sched_stat_runtime: comm=sleep pid=13638 runtime=173915 [ns] vruntime=202889633471 [ns] sleep 13638 [001] 108238.582782: sched:sched_process_exit: comm=sleep pid=13638 prio=120 # # perf script --switch-on syscalls:sys_enter_nanosleep sleep 13638 [001] 108237.582289: sched:sched_stat_runtime: comm=sleep pid=13638 runtime=578104 [ns] vruntime=202889459556 [ns] sleep 13638 [001] 108237.582291: sched:sched_switch: sleep:13638 [120] S ==> swapper/1:0 [120] swapper 0 [001] 108238.582428: sched:sched_waking: comm=sleep pid=13638 prio=120 target_cpu=001 swapper 0 [001] 108238.582458: sched:sched_wakeup: sleep:13638 [120] success=1 CPU:001 sleep 13638 [001] 108238.582698: sched:sched_stat_runtime: comm=sleep pid=13638 runtime=173915 [ns] vruntime=202889633471 [ns] sleep 13638 [001] 108238.582782: sched:sched_process_exit: comm=sleep pid=13638 prio=120 # Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: William Cohen <wcohen@redhat.com> Cc: Florian Weimer <fweimer@redhat.com> Link: https://lkml.kernel.org/n/tip-0omwwoywj1v63gu8cz0tr0cy@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-08-15perf script: Allow specifying event to switch on processing of other eventsArnaldo Carvalho de Melo
Sometime we want to only consider events after something happens, so allow discarding events till such events is found, e.g.: Record all scheduler tracepoints and the sys_enter_nanosleep syscall event for the 'sleep 1' workload: # perf record -e sched:*,syscalls:sys_enter_nanosleep sleep 1 [ perf record: Woken up 31 times to write data ] [ perf record: Captured and wrote 0.032 MB perf.data (10 samples) ] # So we have these events in the generated perf data file: # perf evlist sched:sched_kthread_stop sched:sched_kthread_stop_ret sched:sched_waking sched:sched_wakeup sched:sched_wakeup_new sched:sched_switch sched:sched_migrate_task sched:sched_process_free sched:sched_process_exit sched:sched_wait_task sched:sched_process_wait sched:sched_process_fork sched:sched_process_exec sched:sched_stat_wait sched:sched_stat_sleep sched:sched_stat_iowait sched:sched_stat_blocked sched:sched_stat_runtime sched:sched_pi_setprio sched:sched_move_numa sched:sched_stick_numa sched:sched_swap_numa sched:sched_wake_idle_without_ipi syscalls:sys_enter_nanosleep # Tip: use 'perf evlist --trace-fields' to show fields for tracepoint events # Then show all of the events that actually took place in this 'perf record' session: # perf script :13637 13637 [002] 108237.581529: sched:sched_waking: comm=perf pid=13638 prio=120 target_cpu=001 :13637 13637 [002] 108237.581537: sched:sched_wakeup: perf:13638 [120] success=1 CPU:001 sleep 13638 [001] 108237.581992: sched:sched_process_exec: filename=/usr/bin/sleep pid=13638 old_pid=13638 sleep 13638 [001] 108237.582286: syscalls:sys_enter_nanosleep: rqtp: 0x7fff1948ac40, rmtp: 0x00000000 sleep 13638 [001] 108237.582289: sched:sched_stat_runtime: comm=sleep pid=13638 runtime=578104 [ns] vruntime=202889459556 [ns] sleep 13638 [001] 108237.582291: sched:sched_switch: sleep:13638 [120] S ==> swapper/1:0 [120] swapper 0 [001] 108238.582428: sched:sched_waking: comm=sleep pid=13638 prio=120 target_cpu=001 swapper 0 [001] 108238.582458: sched:sched_wakeup: sleep:13638 [120] success=1 CPU:001 sleep 13638 [001] 108238.582698: sched:sched_stat_runtime: comm=sleep pid=13638 runtime=173915 [ns] vruntime=202889633471 [ns] sleep 13638 [001] 108238.582782: sched:sched_process_exit: comm=sleep pid=13638 prio=120 # Now lets see only the ones that took place after a certain "marker": # perf script --switch-on syscalls:sys_enter_nanosleep sleep 13638 [001] 108237.582289: sched:sched_stat_runtime: comm=sleep pid=13638 runtime=578104 [ns] vruntime=202889459556 [ns] sleep 13638 [001] 108237.582291: sched:sched_switch: sleep:13638 [120] S ==> swapper/1:0 [120] swapper 0 [001] 108238.582428: sched:sched_waking: comm=sleep pid=13638 prio=120 target_cpu=001 swapper 0 [001] 108238.582458: sched:sched_wakeup: sleep:13638 [120] success=1 CPU:001 sleep 13638 [001] 108238.582698: sched:sched_stat_runtime: comm=sleep pid=13638 runtime=173915 [ns] vruntime=202889633471 [ns] sleep 13638 [001] 108238.582782: sched:sched_process_exit: comm=sleep pid=13638 prio=120 # Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Florian Weimer <fweimer@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: William Cohen <wcohen@redhat.com> Link: https://lkml.kernel.org/n/tip-f1oo0ufdhrkx6nhy2lj1ierm@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-08-15perf vendor events intel: Add Tremontx event file v1.02Haiyan Song
Add a Intel event file for perf. Signed-off-by: Haiyan Song <haiyanx.song@intel.com> Reviewed-by: Kan Liang <kan.liang@linux.intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jin Yao <yao.jin@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20190815035942.30602-1-haiyanx.song@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-08-15selftests: kvm: fix vmx_set_nested_state_testPaolo Bonzini
vmx_set_nested_state_test is trying to use the KVM_STATE_NESTED_EVMCS without enabling enlightened VMCS first. Correct the outcome of the test, and actually test that it succeeds after the capability is enabled. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2019-08-15selftests: kvm: provide common function to enable eVMCSPaolo Bonzini
There are two tests already enabling eVMCS and a third is coming. Add a function that enables the capability and tests the result. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2019-08-15selftests: kvm: do not try running the VM in vmx_set_nested_state_testPaolo Bonzini
This test is only covering various edge cases of the KVM_SET_NESTED_STATE ioctl. Running the VM does not really add anything. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2019-08-14tools/testing/nvdimm: Fix fallthrough warningDan Williams
Use the expected 'fall through' designation to fix: tools/testing/nvdimm/test/nfit.c: In function ‘nd_intel_test_finish_query’: tools/testing/nvdimm/test/nfit.c:433:13: warning: this statement may fall through [-Wimplicit-fallthrough=] fw->state = FW_STATE_UPDATED; ~~~~~~~~~~^~~~~~~~~~~~~~~~~~ tools/testing/nvdimm/test/nfit.c:435:2: note: here case FW_STATE_UPDATED: ^~~~ Reviewed-by: Vishal Verma <vishal.l.verma@intel.com> Link: https://lore.kernel.org/r/156521347159.1442374.1381360879102718899.stgit@dwillia2-desk3.amr.corp.intel.com Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2019-08-14tools: bpftool: compile with $(EXTRA_WARNINGS)Quentin Monnet
Compile bpftool with $(EXTRA_WARNINGS), as defined in scripts/Makefile.include, and fix the new warnings produced. Simply leave -Wswitch-enum out of the warning list, as we have several switch-case structures where it is not desirable to process all values of an enum. Remove -Wshadow from the warnings we manually add to CFLAGS, as it is handled in $(EXTRA_WARNINGS). Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com> Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-08-14selftests/bpf: fix "bind{4, 6} deny specific IP & port" on s390Ilya Leoshkevich
"bind4 allow specific IP & port" and "bind6 deny specific IP & port" fail on s390 because of endianness issue: the 4 IP address bytes are loaded as a word and compared with a constant, but the value of this constant should be different on big- and little- endian machines, which is not the case right now. Use __bpf_constant_ntohl to generate proper value based on machine endianness. Fixes: 1d436885b23b ("selftests/bpf: Selftest for sys_bind post-hooks.") Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-08-14perf ui: No need to set ui_browser to 1 twiceArnaldo Carvalho de Melo
We need to do it only when fallbacking from GTK to the TUI. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Link: https://lkml.kernel.org/n/tip-dda0acxqef1k72n9z4myjbjt@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-08-14perf record: Support aarch64 random socket_id assignmentTan Xiaojun
Same as in the commit 01766229533f ("perf record: Support s390 random socket_id assignment"), aarch64 also have this problem. Without this fix: [root@localhost perf]# ./perf report --header -I -v ... socket_id number is too big.You may need to upgrade the perf tool. # ======== # captured on : Thu Aug 1 22:58:38 2019 # header version : 1 ... # Core ID and Socket ID information is not available ... With this fix: [root@localhost perf]# ./perf report --header -I -v ... cpumask list: 0-31 cpumask list: 32-63 cpumask list: 64-95 cpumask list: 96-127 # ======== # captured on : Thu Aug 1 22:58:38 2019 # header version : 1 ... # CPU 0: Core ID 0, Socket ID 36 # CPU 1: Core ID 1, Socket ID 36 ... # CPU 126: Core ID 126, Socket ID 8442 # CPU 127: Core ID 127, Socket ID 8442 ... Signed-off-by: Tan Xiaojun <tanxiaojun@huawei.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Alexey Budankov <alexey.budankov@linux.intel.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Song Liu <songliubraving@fb.com> Cc: Steven Rostedt (VMware) <rostedt@goodmis.org> Cc: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com> Link: http://lkml.kernel.org/r/1564717737-21602-1-git-send-email-tanxiaojun@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-08-14perf.data documentation: Clarify HEADER_SAMPLE_TOPOLOGY formatVince Weaver
The perf.data file format documentation for HEADER_SAMPLE_TOPOLOGY specifies the layout in a confusing manner that doesn't match the rest of the document. This patch attempts to describe things consistent with the rest of the file. Signed-off-by: Vince Weaver <vincent.weaver@maine.edu> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Chong Jiang <chongjiang@chromium.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Simon Que <sque@chromium.org> Link: http://lkml.kernel.org/r/alpine.DEB.2.21.1908011425240.14303@macbook-air Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-08-14tools: Keep list of tools in alphabetical orderAndy Shevchenko
When `make help` is executed it lists the possible tools to build, though couple of entries is kept unordered. Fix it here. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Song Liu <songliubraving@fb.com> Cc: Alexei Starovoitov <ast@kernel.org> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Martin KaFai Lau <kafai@fb.com> Cc: Yonghong Song <yhs@fb.com> Link: https://lkml.kernel.org/n/tip-0ke3p64ksa0hnbueh52n3v3q@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-08-14perf evsel: Provide meaningful warning when trying to use 'aux_output' on ↵Arnaldo Carvalho de Melo
older kernels Just like we do with the 'write_backwards' feature: Before: # perf record -e {intel_pt/branch=0/,cycles/aux-output/ppp} uname Error: The sys_perf_event_open() syscall returned with 22 (Invalid argument) for event (cycles/aux-output/ppp). /bin/dmesg | grep -i perf may provide additional information. # After: # perf record -e {intel_pt/branch=0/,cycles/aux-output/ppp} uname Error: The 'aux_output' feature is not supported, update the kernel. # Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: https://lkml.kernel.org/n/tip-wgjsjroe1e150c0metgwmqwd@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-08-14perf intel-pt: Add brief documentation for PEBS via Intel PTAdrian Hunter
Document how to select PEBS via Intel PT and how to display synthesized PEBS samples. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20190806084606.4021-8-alexander.shishkin@linux.intel.com Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> [ Update the example to use a group with intel_pt// as the group leader, as per Alex comment ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-08-14perf tools: Add aux-output config termAdrian Hunter
Expose the aux_output attribute flag to the user to configure, by adding a config term 'aux-output'. For events that support it, selection of 'aux-output' causes the generation of AUX records instead of event records. This requires that an AUX area event is also provided. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20190806084606.4021-7-alexander.shishkin@linux.intel.com Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-08-14perf intel-pt: Process options for PEBS event synthesisAdrian Hunter
Process synth_opts.other_events and attr.aux_output to set up for synthesizing PEBs via Intel PT events. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20190806084606.4021-6-alexander.shishkin@linux.intel.com Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> [ Fixed up libbperf clashes, i.e. some places using perf_evsel (now in libperf) need to use instead 'evsel' (a tools/perf only abstraction) ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-08-14perf tools: Add itrace option 'o' to synthesize aux-output eventsAdrian Hunter
Add itrace option 'o' to synthesize events recorded in the AUX area due to the use of perf record's aux-output config term. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20190806084606.4021-5-alexander.shishkin@linux.intel.com Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-08-14perf tools: Add aux_output attribute flagAdrian Hunter
Add aux_output attribute flag to match the kernel's perf_event.h file. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20190806084606.4021-4-alexander.shishkin@linux.intel.com Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-08-14perf record: Add an option to take an AUX snapshot on exitAlexander Shishkin
It is sometimes useful to generate a snapshot when perf record exits; I've been using a wrapper script around the workload that would do a killall -USR2 perf when the workload exits. This patch makes it easier and also works when perf record is attached to a pre-existing task. A new snapshot option 'e' can be specified in -S to enable this behavior: root@elsewhere:~# perf record -e intel_pt// -Se sleep 1 [ perf record: Woken up 2 times to write data ] [ perf record: Captured and wrote 0.085 MB perf.data ] Co-developed-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20190806144101.62892-1-alexander.shishkin@linux.intel.com [ Fixed up !HAVE_AUXTRACE_SUPPORT build in builtin-record.c, adding 2 missing __maybe_unused ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-08-14perf ftrace: Improve error message about capability to use ftraceArnaldo Carvalho de Melo
If we link against libcap, then we can state that CAP_SYS_ADMIN is needed, if not, fallback to telling the user it needs to be root, as was before linking against libcap. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Alexey Budankov <alexey.budankov@linux.intel.com> Cc: Igor Lubashev <ilubashe@akamai.com> Cc: James Morris <jmorris@namei.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Suzuki Poulouse <suzuki.poulose@arm.com> Link: https://lkml.kernel.org/n/tip-hhnbjdo8r67054of9zm2kxtl@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-08-14perf ftrace: Use CAP_SYS_ADMIN instead of euid==0Igor Lubashev
The kernel requires CAP_SYS_ADMIN instead of euid==0 to mount debugfs for ftrace. Make perf do the same. Signed-off-by: Igor Lubashev <ilubashe@akamai.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Alexey Budankov <alexey.budankov@linux.intel.com> Cc: James Morris <jmorris@namei.org> Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Suzuki Poulouse <suzuki.poulose@arm.com> Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/bd8763b72ed4d58d0b42d44fbc7eb474d32e53a3.1565188228.git.ilubashe@akamai.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-08-14perf tools: Add CAP_SYSLOG define for older systemsArnaldo Carvalho de Melo
Some of the systems I test don't have that define, provide it conditionally since we'll use it in the kptr_restrict checks in the next patch. Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Alexey Budankov <alexey.budankov@linux.intel.com> Cc: Igor Lubashev <ilubashe@akamai.com> Cc: James Morris <jmorris@namei.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Suzuki Poulouse <suzuki.poulose@arm.com> Link: https://lkml.kernel.org/n/tip-dcize2v6jjab7tds5ngz97dk@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-08-14perf tools: Add NO_LIBCAP=1 to the minimal build testArnaldo Carvalho de Melo
We need to add these so that we test building without all selectable features. Acked-by: Igor Lubashev <ilubashe@akamai.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Alexey Budankov <alexey.budankov@linux.intel.com> Cc: James Morris <jmorris@namei.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Suzuki Poulouse <suzuki.poulose@arm.com> Link: https://lkml.kernel.org/n/tip-eknnvp22elznj0cl5a39hc4v@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-08-14perf tools: Add helpers to use capabilities if presentIgor Lubashev
Add utilities to help checking capabilities of the running procss. Make perf link with libcap, if it is available. If no libcap-dev[el], fallback to the geteuid() == 0 test used before. Committer notes: $ perf test python 18: 'import perf' in python : FAILED! $ perf test -v python Couldn't bump rlimit(MEMLOCK), failures may take place when creating BPF maps, etc 18: 'import perf' in python : --- start --- test child forked, pid 23288 Traceback (most recent call last): File "<stdin>", line 1, in <module> ImportError: /tmp/build/perf/python/perf.so: undefined symbol: cap_get_flag test child finished with -1 ---- end ---- 'import perf' in python: FAILED! $ This happens because differently from the perf binary generated with this patch applied: $ ldd /tmp/build/perf/perf | grep libcap libcap.so.2 => /lib64/libcap.so.2 (0x00007f724a4ef000) $ The python binding isn't linking with libcap: $ ldd /tmp/build/perf/python/perf.so | grep libcap $ So add 'cap' to the 'extra_libraries' variable in tools/perf/util/setup.py, and rebuild: $ perf test python 18: 'import perf' in python : Ok $ If we explicitely disable libcap it also continues to work: $ make NO_LIBCAP=1 -C tools/perf O=/tmp/build/perf install-bin $ ldd /tmp/build/perf/perf | grep libcap $ ldd /tmp/build/perf/python/perf.so | grep libcap $ perf test python 18: 'import perf' in python : Ok $ Signed-off-by: Igor Lubashev <ilubashe@akamai.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Alexey Budankov <alexey.budankov@linux.intel.com> Cc: James Morris <jmorris@namei.org> Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Suzuki Poulouse <suzuki.poulose@arm.com> Cc: linux-arm-kernel@lists.infradead.org [ split from a larger patch ] Link: http://lkml.kernel.org/r/8a1e76cf5c7c9796d0d4d240fbaa85305298aafa.1565188228.git.ilubashe@akamai.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-08-14media: selftests: ir: fix ir_loopback test failureSean Young
The decoder is called rc-mm, not rcmm. This was renamed late in the cycle so this bug crept in. Acked-by: Shuah Khan <skhan@linuxfoundation.org> Signed-off-by: Sean Young <sean@mess.org> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
2019-08-13Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-nextJakub Kicinski
Daniel Borkmann says: ==================== The following pull-request contains BPF updates for your *net-next* tree. There is a small merge conflict in libbpf (Cc Andrii so he's in the loop as well): for (i = 1; i <= btf__get_nr_types(btf); i++) { t = (struct btf_type *)btf__type_by_id(btf, i); if (!has_datasec && btf_is_var(t)) { /* replace VAR with INT */ t->info = BTF_INFO_ENC(BTF_KIND_INT, 0, 0); <<<<<<< HEAD /* * using size = 1 is the safest choice, 4 will be too * big and cause kernel BTF validation failure if * original variable took less than 4 bytes */ t->size = 1; *(int *)(t+1) = BTF_INT_ENC(0, 0, 8); } else if (!has_datasec && kind == BTF_KIND_DATASEC) { ======= t->size = sizeof(int); *(int *)(t + 1) = BTF_INT_ENC(0, 0, 32); } else if (!has_datasec && btf_is_datasec(t)) { >>>>>>> 72ef80b5ee131e96172f19e74b4f98fa3404efe8 /* replace DATASEC with STRUCT */ Conflict is between the two commits 1d4126c4e119 ("libbpf: sanitize VAR to conservative 1-byte INT") and b03bc6853c0e ("libbpf: convert libbpf code to use new btf helpers"), so we need to pick the sanitation fixup as well as use the new btf_is_datasec() helper and the whitespace cleanup. Looks like the following: [...] if (!has_datasec && btf_is_var(t)) { /* replace VAR with INT */ t->info = BTF_INFO_ENC(BTF_KIND_INT, 0, 0); /* * using size = 1 is the safest choice, 4 will be too * big and cause kernel BTF validation failure if * original variable took less than 4 bytes */ t->size = 1; *(int *)(t + 1) = BTF_INT_ENC(0, 0, 8); } else if (!has_datasec && btf_is_datasec(t)) { /* replace DATASEC with STRUCT */ [...] The main changes are: 1) Addition of core parts of compile once - run everywhere (co-re) effort, that is, relocation of fields offsets in libbpf as well as exposure of kernel's own BTF via sysfs and loading through libbpf, from Andrii. More info on co-re: http://vger.kernel.org/bpfconf2019.html#session-2 and http://vger.kernel.org/lpc-bpf2018.html#session-2 2) Enable passing input flags to the BPF flow dissector to customize parsing and allowing it to stop early similar to the C based one, from Stanislav. 3) Add a BPF helper function that allows generating SYN cookies from XDP and tc BPF, from Petar. 4) Add devmap hash-based map type for more flexibility in device lookup for redirects, from Toke. 5) Improvements to XDP forwarding sample code now utilizing recently enabled devmap lookups, from Jesper. 6) Add support for reporting the effective cgroup progs in bpftool, from Jakub and Takshak. 7) Fix reading kernel config from bpftool via /proc/config.gz, from Peter. 8) Fix AF_XDP umem pages mapping for 32 bit architectures, from Ivan. 9) Follow-up to add two more BPF loop tests for the selftest suite, from Alexei. 10) Add perf event output helper also for other skb-based program types, from Allan. 11) Fix a co-re related compilation error in selftests, from Yonghong. ==================== Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
2019-08-13Merge LKMM and RCU commitsPaul E. McKenney
2019-08-13libbpf: attempt to load kernel BTF from sysfs firstAndrii Nakryiko
Add support for loading kernel BTF from sysfs (/sys/kernel/btf/vmlinux) as a target BTF. Also extend the list of on disk search paths for vmlinux ELF image with entries that perf is searching for. Signed-off-by: Andrii Nakryiko <andriin@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-08-13selftests/bpf: fix race in flow dissector testsPetar Penkov
Since the "last_dissection" map holds only the flow keys for the most recent packet, there is a small race in the skb-less flow dissector tests if a new packet comes between transmitting the test packet, and reading its keys from the map. If this happens, the test packet keys will be overwritten and the test will fail. Changing the "last_dissection" map to a hash map, keyed on the source/dest port pair resolves this issue. Additionally, let's clear the last test results from the map between tests to prevent previous test cases from interfering with the following test cases. Fixes: 0905beec9f52 ("selftests/bpf: run flow dissector tests in skb-less mode") Signed-off-by: Petar Penkov <ppenkov@google.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-08-13tools: bpftool: add feature check for zlibPeter Wu
bpftool requires libelf, and zlib for decompressing /proc/config.gz. zlib is a transitive dependency via libelf, and became mandatory since elfutils 0.165 (Jan 2016). The feature check of libelf is already done in the elfdep target of tools/lib/bpf/Makefile, pulled in by bpftool via a dependency on libbpf.a. Add a similar feature check for zlib. Suggested-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: Peter Wu <peter@lekensteyn.nl> Acked-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-08-12tools build: Add capability-related feature detectionIgor Lubashev
Add utilities to help checking capabilities of the running procss. Make perf link with libcap, if it is available. If no libcap-dev[el], assume no capabilities. Committer testing: $ make O=/tmp/build/perf -C tools/perf install-bin make: Entering directory '/home/acme/git/perf/tools/perf' BUILD: Doing 'make -j8' parallel build Auto-detecting system features: <SNIP> ... libbfd: [ on ] ... libcap: [ OFF ] ... libelf: [ on ] <SNIP> Makefile.config:833: No libcap found, disables capability support, please install libcap-devel/libcap-dev <SNIP> $ grep libcap /tmp/build/perf/FEATURE-DUMP feature-libcap=0 $ cat /tmp/build/perf/feature/test-libcap.make.output test-libcap.c:2:10: fatal error: sys/capability.h: No such file or directory 2 | #include <sys/capability.h> | ^~~~~~~~~~~~~~~~~~ compilation terminated. $ Now install libcap-devel and try again: $ make O=/tmp/build/perf -C tools/perf install-bin make: Entering directory '/home/acme/git/perf/tools/perf' BUILD: Doing 'make -j8' parallel build Warning: Kernel ABI header at 'tools/include/linux/bits.h' differs from latest version at 'include/linux/bits.h' diff -u tools/include/linux/bits.h include/linux/bits.h Warning: Kernel ABI header at 'tools/arch/x86/include/asm/cpufeatures.h' differs from latest version at 'arch/x86/include/asm/cpufeatures.h' diff -u tools/arch/x86/include/asm/cpufeatures.h arch/x86/include/asm/cpufeatures.h Auto-detecting system features: <SNIP> ... libbfd: [ on ] ... libcap: [ on ] ... libelf: [ on ] <SNIP>> CC /tmp/build/perf/jvmti/libjvmti.o <SNIP>> $ grep libcap /tmp/build/perf/FEATURE-DUMP feature-libcap=1 $ cat /tmp/build/perf/feature/test-libcap.make.output $ ldd /tmp/build/perf/feature/test-libcap.make.bin ldd: /tmp/build/perf/feature/test-libcap.make.bin: No such file or directory $ ldd /tmp/build/perf/feature/test-libcap.bin linux-vdso.so.1 (0x00007ffc35bfe000) libcap.so.2 => /lib64/libcap.so.2 (0x00007ff9c62ff000) libc.so.6 => /lib64/libc.so.6 (0x00007ff9c6139000) /lib64/ld-linux-x86-64.so.2 (0x00007ff9c6326000) $ Signed-off-by: Igor Lubashev <ilubashe@akamai.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Alexey Budankov <alexey.budankov@linux.intel.com> Cc: James Morris <jmorris@namei.org> Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Suzuki Poulouse <suzuki.poulose@arm.com> [ split from a larger patch ] Link: http://lkml.kernel.org/r/8a1e76cf5c7c9796d0d4d240fbaa85305298aafa.1565188228.git.ilubashe@akamai.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-08-12perf top: Collapse and resort all evsels in a groupArnaldo Carvalho de Melo
And link them, i.e. find the hist entries in the non-leader events and link them to the ones in the leader. This should be the same thing already done for the 'perf report' case, but now we do it periodically. With this in place we get percentages in from the second overhead column on, not just on the first (the leader). Try it using: perf top --stdio -e '{cycles,instructions}' You should see something like: PerfTop: 20776 irqs/sec kernel:68.7% exact: 0.0% lost: 0/0 drop: 0/0 [cycles], (all, 8 CPUs) --------------------------------------------------------------------------------------------------- 4.44% 0.44% [kernel] [k] do_syscall_64 2.27% 0.17% [kernel] [k] entry_SYSCALL_64 1.73% 0.27% [kernel] [k] syscall_return_via_sysret 1.60% 0.91% [kernel] [k] _raw_spin_lock_irqsave 1.45% 3.53% libglib-2.0.so.0.6000.4 [.] g_string_insert_unichar 1.39% 0.21% [kernel] [k] copy_user_enhanced_fast_string 1.26% 1.15% [kernel] [k] psi_task_change 1.16% 0.14% libpixman-1.so.0.38.0 [.] 0x000000000006f403 1.00% 0.32% [kernel] [k] __sched_text_start 0.97% 2.11% [kernel] [k] n_tty_write 0.96% 0.04% [kernel] [k] queued_spin_lock_slowpath 0.93% 0.88% [kernel] [k] menu_select 0.87% 0.14% [kernel] [k] try_to_wake_up 0.77% 0.10% libpixman-1.so.0.38.0 [.] 0x000000000006f40b 0.73% 0.09% libpixman-1.so.0.38.0 [.] 0x000000000006f413 0.69% 0.48% libc-2.29.so [.] __memmove_avx_unaligned_erms 0.68% 0.29% [kernel] [k] _raw_spin_lock_irq 0.61% 0.04% libpixman-1.so.0.38.0 [.] 0x000000000006f423 0.60% 0.37% [kernel] [k] native_sched_clock 0.57% 0.23% [kernel] [k] do_idle 0.57% 0.23% [kernel] [k] __fget 0.56% 0.30% [kernel] [k] __switch_to_asm 0.56% 0.00% libc-2.29.so [.] __memset_avx2_erms 0.52% 0.32% [kernel] [k] _raw_spin_lock 0.49% 0.24% [kernel] [k] n_tty_poll 0.49% 0.54% libglib-2.0.so.0.6000.4 [.] g_mutex_lock 0.48% 0.62% [kernel] [k] _raw_spin_unlock_irqrestore 0.47% 0.27% [kernel] [k] __switch_to 0.47% 0.25% [kernel] [k] pick_next_task_fair 0.45% 0.17% [kernel] [k] filldir64 0.40% 0.16% [kernel] [k] update_rq_clock 0.39% 0.19% [kernel] [k] enqueue_task_fair # Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Link: https://lkml.kernel.org/n/tip-uw8cjeifxvjpkjp6x2iil0ar@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-08-12perf hist: Remove dummy entries when finding real ones.Arnaldo Carvalho de Melo
When he have an event group we have multiple struct hist instances, one per evsel, and in each of these hists we may have hist_entries that point to the same thing being observed, say a symbol, i.e. if we're looking at instructions and cycles, then we'll have one hist_entry in the "instructions" evsel and another in the "cycles" evsel. We need to link those to then show one column for each. When we're looking at some other pair of events, say instructions and cache misses, we may have just the "instructions" hist entry and not one for "cache misses", as instructions not necessarily generate cache misses, as the logic expects one hist_entry per evsel, we end up adding "dummy" hist_entries. This is enough for 'perf report', that does this matching operation (hists__match()) just once after processing all events, but for 'perf top', we do this at each refresh, so we may finally find events matching and then we need to trow away the dummies and link with the real events. So if we find a match, traverse the link of matches and trow away dummies for that hists. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Link: https://lkml.kernel.org/n/tip-dwvtjqqifsbsczeb35q6mqkk@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-08-12perf trace: Fix segmentation fault when access syscall info on arm64Leo Yan
'perf trace' reports the segmentation fault as below on Arm64: # perf trace -e string -e augmented_raw_syscalls.c LLVM: dumping tools/perf/examples/bpf/augmented_raw_syscalls.o perf: Segmentation fault Obtained 12 stack frames. perf(sighandler_dump_stack+0x47) [0xaaaaac96ac87] linux-vdso.so.1(+0x5b7) [0xffffadbeb5b7] /lib/aarch64-linux-gnu/libc.so.6(strlen+0x10) [0xfffface7d5d0] /lib/aarch64-linux-gnu/libc.so.6(_IO_vfprintf+0x1ac7) [0xfffface49f97] /lib/aarch64-linux-gnu/libc.so.6(__vsnprintf_chk+0xc7) [0xffffacedfbe7] perf(scnprintf+0x97) [0xaaaaac9ca3ff] perf(+0x997bb) [0xaaaaac8e37bb] perf(cmd_trace+0x28e7) [0xaaaaac8ec09f] perf(+0xd4a13) [0xaaaaac91ea13] perf(main+0x62f) [0xaaaaac8a147f] /lib/aarch64-linux-gnu/libc.so.6(__libc_start_main+0xe3) [0xfffface22d23] perf(+0x57723) [0xaaaaac8a1723] Segmentation fault This issue is introduced by commit 30a910d7d3e0 ("perf trace: Preallocate the syscall table"), it allocates trace->syscalls.table[] array and the element count is 'trace->sctbl->syscalls.nr_entries'; but on Arm64, the system call number is not continuously used; e.g. the syscall maximum id is 436 but the real entries is only 281. So the table is allocated with 'nr_entries' as the element count, but it accesses the table with the syscall id, which might be out of the bound of the array and cause the segmentation fault. This patch allocates trace->syscalls.table[] with the element count is 'trace->sctbl->syscalls.max_id + 1', this allows any id to access the table without out of the bound. Signed-off-by: Leo Yan <leo.yan@linaro.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Martin KaFai Lau <kafai@fb.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Song Liu <songliubraving@fb.com> Cc: Yonghong Song <yhs@fb.com> Fixes: 30a910d7d3e0 ("perf trace: Preallocate the syscall table") Link: http://lkml.kernel.org/r/20190809104752.27338-1-leo.yan@linaro.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-08-12perf hists: Do not link a pair if already linkedArnaldo Carvalho de Melo
When we have multiple events in a group we link hist_entries in the non-leader evsel hists to the one in the leader that points to the same sorting criteria, in hists__match(). For 'perf report' we do this just once and then print the results, but for 'perf top' we need to look if this was already done in the previous refresh of the screen, so check for that and don't try to link again. This is part of having 'perf top' using the hists browser for showing multiple events in multiple columns. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Link: https://lkml.kernel.org/n/tip-iwvb37rgb7upswhruwpcdnhw@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-08-12perf top: Set display thread COMM to help with debuggingArnaldo Carvalho de Melo
When we want to attach just to the thread that updates the display it helps having its COMM stand out, so change it from the default "perf" to "perf-top-UI". Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Link: https://lkml.kernel.org/n/tip-5w0hmlk3zfvysxvpsh763k9w@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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