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2017-01-26tools lib bpf: Add set/is helpers for all prog typesJoe Stringer
These bpf_prog_types were exposed in the uapi but there were no corresponding functions to set these types for programs in libbpf. Signed-off-by: Joe Stringer <joe@ovn.org> Acked-by: Wang Nan <wangnan0@huawei.com> Cc: Alexei Starovoitov <ast@fb.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: netdev@vger.kernel.org Link: http://lkml.kernel.org/r/20170123011128.26534-4-joe@ovn.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-26tools lib bpf: Define prog_type fns with macroJoe Stringer
Turning this into a macro allows future prog types to be added with a single line per type. Signed-off-by: Joe Stringer <joe@ovn.org> Acked-by: Wang Nan <wangnan0@huawei.com> Cc: Alexei Starovoitov <ast@fb.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: netdev@vger.kernel.org Link: http://lkml.kernel.org/r/20170123011128.26534-3-joe@ovn.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-26tools lib bpf: Fix map offsets in relocationJoe Stringer
Commit 4708bbda5cb2 ("tools lib bpf: Fix maps resolution") attempted to fix map resolution by identifying the number of symbols that point to maps, and using this number to resolve each of the maps. However, during relocation the original definition of the map size was still in use. For up to two maps, the calculation was correct if there was a small difference in size between the map definition in libbpf and the one that the client library uses. However if the difference was large, particularly if more than two maps were used in the BPF program, the relocation would fail. For example, when using a map definition with size 28, with three maps, map relocation would count: (sym_offset / sizeof(struct bpf_map_def) => map_idx) (0 / 16 => 0), ie map_idx = 0 (28 / 16 => 1), ie map_idx = 1 (56 / 16 => 3), ie map_idx = 3 So, libbpf reports: libbpf: bpf relocation: map_idx 3 large than 2 Fix map relocation by checking the exact offset of maps when doing relocation. Signed-off-by: Joe Stringer <joe@ovn.org> [Allow different map size in an object] Signed-off-by: Wang Nan <wangnan0@huawei.com> Cc: Alexei Starovoitov <ast@fb.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: netdev@vger.kernel.org Fixes: 4708bbda5cb2 ("tools lib bpf: Fix maps resolution") Link: http://lkml.kernel.org/r/20170123011128.26534-2-joe@ovn.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-26perf probe: Delete an unnecessary assignment in try_to_find_absolute_address()Markus Elfring
Remove an error code assignment which is redundant in an if branch for the handling of a memory allocation failure because the same value was set for the local variable "err" before. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Acked-by: Masami Hiramatsu <mhiramat@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: He Kuang <hekuang@huawei.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Milian Wolff <milian.wolff@kdab.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com> Cc: Wang Nan <wangnan0@huawei.com> Cc: kernel-janitors@vger.kernel.org Link: http://lkml.kernel.org/r/0ede09ec-79b6-c8bd-5b20-02c63ed98aab@users.sourceforge.net Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-26perf probe: Delete an unnecessary check in try_to_find_absolute_address()Markus Elfring
Remove a condition check which is unnecessary at the end because this source code place should usually only be reached with a non-zero pointer. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Acked-by: Masami Hiramatsu <mhiramat@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: He Kuang <hekuang@huawei.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Milian Wolff <milian.wolff@kdab.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com> Cc: Wang Nan <wangnan0@huawei.com> Cc: kernel-janitors@vger.kernel.org Link: http://lkml.kernel.org/r/a3f2473b-6383-a326-bce0-b826423608b8@users.sourceforge.net Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-26perf probe: Fix wrong register name for arm64He Kuang
The register name of arm64 architecture is x0-x31 not r0-r31, this patch changes this typo. Before this patch: # perf probe --definition 'sys_write count' p:probe/sys_write _text+1502872 count=%r2:s64 # echo 'p:probe/sys_write _text+1502872 count=%r2:s64' > \ /sys/kernel/debug/tracing/kprobe_events Parse error at argument[0]. (-22) After this patch: # perf probe --definition 'sys_write count' p:probe/sys_write _text+1502872 count=%x2:s64 # echo 'p:probe/sys_write _text+1502872 count=%x2:s64' > \ /sys/kernel/debug/tracing/kprobe_events # echo 1 >/sys/kernel/debug/tracing/events/probe/enable # cat /sys/kernel/debug/tracing/trace ... sh-422 [000] d... 650.495930: sys_write: (SyS_write+0x0/0xc8) count=22 sh-422 [000] d... 651.102389: sys_write: (SyS_write+0x0/0xc8) count=26 sh-422 [000] d... 651.358653: sys_write: (SyS_write+0x0/0xc8) count=86 Signed-off-by: He Kuang <hekuang@huawei.com> Acked-by: Masami Hiramatsu <mhiramat@kernel.org> Acked-by: Will Deacon <will.deacon@arm.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Bintian Wang <bintian.wang@huawei.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/r/20170124103015.1936-2-hekuang@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-20perf c2c report: Coalesce by default only by pid,iaddrJiri Olsa
It seems to be the most used argument for -c option so far. In the beginning when you want to have the overall process report, so it makes sense to make it the default one. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Joe Mario <jmario@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1484904032-11040-5-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-20perf c2c report: Display Total records column in offset viewJiri Olsa
Adding "Total records" column into cacheline pareto table, between cycles and cpu info. $ perf c2c report ... --- ---------- cycles ---------- Total cpu rmt hitm lcl hitm load records cnt ... ........ ........ ........ ....... ........ 0 112 71 34 4 0 0 0 18 1 0 0 0 2 1 0 132 0 3 3 ... It's useful to see how many recorded samples represent each offset. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Joe Mario <jmario@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1484904032-11040-4-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-20perf hists browser: Add e/c hotkeys to expand/collapse callchain for current ↵Jiri Olsa
entry Currently we allow only to expand or collapse all entries in the browser with 'E' or 'C' keys. Allow user to expand or collapse only current entry in the browser with e or c key. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Joe Mario <jmario@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1484904032-11040-3-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-20perf hists browser: Put hist_entry folding logic into single functionJiri Olsa
It will be used in following patch to expand or collapse only the current browser entry. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1484904032-11040-2-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-18perf unwind: Fix looking up dwarf unwind stack infoMatija Glavinic Pecotic
Using perf with call graph method dwarf fails to provide backtrace support for stripped binary even though .gnu_debuglink points to *.dbg flavor with properly populated debug symbols. Problem is reproduced on ARM (v7, v8), kernels 3.14.y, 4.4.y and 4.10.rc3. Perf is configured with libunwind, and unwind dwarf support [1]. Test code (stress_bt.c) can be found on [2]. Running (explicitly disable other unwinding methods): $ gcc -g -o stress_bt -fomit-frame-pointer -fno-unwind-tables \ -fno-asynchronous-unwind-tables stress_bt.c $ perf record -N --call-graph dwarf ./stress_bt $ perf report results in properly generated call graph. Stripping the binary and running it results with missing call graph. Expected result is to have call graph: $ gcc -g -o stress_bt -fomit-frame-pointer -fno-unwind-tables \ -fno-asynchronous-unwind-tables stress_bt.c $ objcopy --only-keep-debug stress_bt stress_bt.dbg $ objcopy --strip-debug stress_bt $ objcopy --add-gnu-debuglink=stress_bt.dbg stress_bt $ perf record -N --call-graph dwarf ./stress_bt $ perf report Problem is that perf doesn't try to read symbols pointed by gnu debuglink. Patch adds checking, and reading of the symbols from debuglink and symsrc. Order of the check is to first check within dso, then check whether symsrc is defined and try to read from it. Finally, debuglink is checked. Default locations of debug files are discussed in [3] and [4]. Comments on RFC are on [5]. [1] https://wiki.linaro.org/LEG/Engineering/TOOLS/perf-callstack-unwinding [2] [1]#Backtrace_stress_application [3] https://sourceware.org/gdb/onlinedocs/gdb/Separate-Debug-Files.html [4] https://sourceware.org/binutils/docs/binutils/objcopy.html [5] https://lkml.org/lkml/2016/8/22/473 Signed-off-by: Matija Glavinic Pecotic <matija.glavinic-pecotic.ext@nokia.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Sverdlin <alexander.sverdlin@nokia.com> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Link: http://lkml.kernel.org/r/d309d40a-463f-482b-68e1-1465326efdc1@nokia.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-18Merge tag 'perf-core-for-mingo-4.11-20170117' of ↵Ingo Molnar
git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo: New features: - Account thread wait time (off CPU time) separately: sleep, iowait and preempt, based on the prev_state of the last event, show the breakdown when using "perf sched timehist --state" (Namhyumg Kim) Infrastructure changes: - Factor out PMU scale conversion code (Andi Kleen) - Remove unnecessary feature-dwarf warning (David Carrillo-Cisneros) - Add missing member name in OPT_() macros (Soramichi AKIYAMA) - Move variables referenced in libperf.a object files from perf's main() file, so that other tools can use libperf.a with a different main() (Soramichi AKIYAMA) Documentation changes: - Fix 'perf script' man page about --dump-raw-trace option (Michael Petlan) - Also allow forcing reading of non-root owned files by root in 'perf script' (Yannick Brosseau) Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-17perf evlist: Fix typo in deliver_sample()Soramichi AKIYAMA
This patch fixes a typo: s/delievery/delivery/ Signed-off-by: Soramichi Akiyama <akiyama@m.soramichi.jp> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20170117222233.dfd92de0ad701e7c53396950@m.soramichi.jp Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-17perf tools: Move two variables usied in libperf from perf.cSoramichi AKIYAMA
The use_browser and perf_version_string variables are both declared in perf.c but they are also referenced by other functions of libperf.a. Therefore a user linking an own main() with libperf.a must declare those two variables in their files even if the files never use the browser or the version information. This patch fixes this issue by moving use_browser and perf_version_string out of perf.c to some other files. Signed-off-by: Soramichi Akiyama <akiyama@m.soramichi.jp> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20170117002237.c1aec0ce3b4d675dca018deb@m.soramichi.jp Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-17perf sched timehist: Show total wait times for summaryNamhyung Kim
When --state option is given, the summary will show total run, sleep, iowait, preempt and delay time instead of statistics of runtime. $ perf sched timehist -s --state Wait-time summary comm parent sched-in run-time sleep iowait preempt delay (count) (msec) (msec) (msec) (msec) (msec) --------------------------------------------------------------------- systemd[1] 0 3 0.497 1.685 0.000 0.000 0.061 ksoftirqd/0[3] 2 21 0.434 989.948 0.000 0.000 0.325 rcu_preempt[7] 2 28 0.386 993.211 0.000 0.000 0.712 migration/0[10] 2 12 0.126 50.174 0.000 0.000 0.044 watchdog/0[11] 2 1 0.009 0.000 0.000 0.000 0.016 migration/1[13] 2 2 0.029 11.755 0.000 0.000 0.007 <SNIP> Signed-off-by: Namhyung Kim <namhyung@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Minchan Kim <minchan@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20170113104523.31212-3-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-17perf sched timehist: Add --state optionNamhyung Kim
The --state option is to show task state when switched out. The state is printed as a single character like in the /proc but I added 'I' for idle state rather than 'R'. $ perf sched timehist --state | head Samples do not have callchains. time cpu task name wait time sch delay run time state [tid/pid] (msec) (msec) (msec) -------- --- ----------------------- -------- ------------------ ----- 1.753791 [3] <idle> 0.000 0.000 0.000 I 1.753834 [1] perf[27469] 0.000 0.000 0.000 S 1.753904 [3] perf[27470] 0.000 0.006 0.112 S 1.753914 [1] <idle> 0.000 0.000 0.079 I 1.753915 [3] migration/3[23] 0.000 0.002 0.011 S 1.754287 [2] <idle> 0.000 0.000 0.000 I 1.754335 [2] transmission[1773/1739] 0.000 0.004 0.047 S Signed-off-by: Namhyung Kim <namhyung@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Minchan Kim <minchan@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20170113104523.31212-2-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-17perf sched timehist: Account thread wait time separatelyNamhyung Kim
Separate thread wait time into 3 parts - sleep, iowait and preempt based on the prev_state of the last event. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Minchan Kim <minchan@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20170113104523.31212-1-namhyung@kernel.org [ Fix the build on centos:5 where 'wait' shadows a global declaration ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-16perf script: Also allow forcing reading of non-root owned files by rootYannick Brosseau
In 2059fc7a5a9e ("perf symbols: Allow forcing reading of non-root owned files by root") 'perf report' was added the option of forcing reading of non-root owned symbol file. This add the same behavior for perf script. Reported-by: Mark Drayton <mbd@fb.com> Signed-off-by: Yannick Brosseau <scientist@fb.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: kernel-team@fb.com Link: http://lkml.kernel.org/r/20170113182527.18625-1-scientist@fb.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-16perf script: Fix man page about --dump-raw-trace optionMichael Petlan
The "--dump-raw-script" is not a valid option, replace it with the valid one, "--dump-raw-trace" Signed-off-by: Michael Petlan <mpetlan@redhat.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Fixes: 133dc4c39c57 ("perf: Rename 'perf trace' to 'perf script'") LPU-Reference: 728644547.14560155.1484320012612.JavaMail.zimbra@redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-16tools lib subcmd: Fix missing member nameSoramichi AKIYAMA
This patch adds missing member names to struct initializations. Although in C99 for struct S {int x, int y} two init codes struct S s = {.x = (a), (b)} and struct S s = {.x = (a), .y = (b)} are the same, it is better to explicitly write .y (.argh in this patch) for readability and robustness against language/compiler evolutions. Signed-off-by: Soramichi Akiyama <akiyama@m.soramichi.jp> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20170113215623.32fb1ac2d862af0048c30fe6@m.soramichi.jp Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-16perf tools: Remove unneccessary feature-dwarf warningDavid Carrillo-Cisneros
Don't warn for feature-dwarf==0 if user explicitily disabled DWARF by using NO_DWARF=1. Signed-off-by: David Carrillo-Cisneros <davidcc@google.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/20170112210159.76143-1-davidcc@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-16perf pmu: Factor out scale conversion codeAndi Kleen
Move the scale factor parsing code to an own function to reuse it in an upcoming patch. v2: Return error in case strdup returns NULL. Signed-off-by: Andi Kleen <ak@linux.intel.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Link: http://lkml.kernel.org/r/20170103150833.6694-2-andi@firstfloor.org [ Keep returning -ENOMEM when strdup() fails in perf_pmu__parse_scale()/convert_scale() ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-14kprobes, extable: Identify kprobes trampolines as kernel text areaMasami Hiramatsu
Improve __kernel_text_address()/kernel_text_address() to return true if the given address is on a kprobe's instruction slot trampoline. This can help stacktraces to determine the address is on a text area or not. To implement this atomically in is_kprobe_*_slot(), also change the insn_cache page list to an RCU list. This changes timings a bit (it delays page freeing to the RCU garbage collection phase), but none of that is in the hot path. Note: this change can add small overhead to stack unwinders because it adds 2 additional checks to __kernel_text_address(). However, the impact should be very small, because kprobe_insn_pages list has 1 entry per 256 probes(on x86, on arm/arm64 it will be 1024 probes), and kprobe_optinsn_pages has 1 entry per 32 probes(on x86). In most use cases, the number of kprobe events may be less than 20, which means that is_kprobe_*_slot() will check just one entry. Tested-by: Josh Poimboeuf <jpoimboe@redhat.com> Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Acked-by: Peter Zijlstra <peterz@infradead.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andrey Konovalov <andreyknvl@google.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/148388747896.6869.6354262871751682264.stgit@devbox [ Improved the changelog and coding style. ] Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-12Merge tag 'perf-core-for-mingo-4.11-20170111' of ↵Ingo Molnar
git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo: New features: - Add more triggers to switch the output file (perf.data.TIMESTAMP). Now, in addition to switching to a different output file when receiving a SIGUSR2, one can also specify file size and time based triggers: perf record -a --switch-output=signal is equivalent to what we had before: perf record -a --switch-output While we can also ask for the file to be "sliced" by size, taking into account that that will happen only when we get woken up by the kernel, i.e. one has to take into account the --mmap-pages (the size of the perf mmap ring buffer): perf record -a --switch-output=2G will break the perf.data output into multiple files limited to 2GB of samples, right when generating the output. For time based samples, alert() will be used, so to have 1 minute limited perf.data output files: perf record -a --switch-output=1m (Jiri Olsa) - Remove the need to use -e only for syscalls and --event only for tracepoints/HW/SW/etc events, i.e. now one can use: perf trace -e nanosleep,futex,sched:sched_switch ./workload or: perf trace --event nanosleep,futex,sched:sched_switch ./workload And have it tracing raw_syscalls:sys_{enter,exit} for the nanosleep and futex syscalls, formatting those as strace does while also tracing sched:sched_switch, ordering it all into one strace like output. Using '!' as the first character in the -e/--event argument remains a way to negate the list of syscalls, i.e. all syscalls except for the ones specified, doesn't affect the other kinds of events. E.g: [root@jouet ~] # perf trace -e sched:sched_switch,nanosleep usleep 1 0.000 ( 0.028 ms): usleep/28150 nanosleep(rqtp: 0x7ffe4201b9f0) ... 0.028 ( ): sched:sched_switch:usleep:28150 [120] S ==> swapper/0:0 [120]) 0.000 ( 0.065 ms): usleep/28150 ... [continued]: nanosleep()) = 0 [root@jouet ~]# (Arnaldo Carvalho de Melo) - 'perf kallsyms' toy tool to look for extended symbol information on the running kernel and demonstrate the machine/thread/symbol APIs for use in other tools, such as 'perf probe' (Arnaldo Carvalho de Melo) Infrastructure improvements: - Add missing linux/kernel.h include to subcmd.h (Arnaldo Carvalho de Melo) tools: Sync x86's vmx.h with the kernel - Create libdir directory before installing libperf-jvmti.so (Laura Abbott) - Fix typo in perf_evlist__start_workload() (Soramichi Akiyama) Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-11tools: Sync x86's vmx.h with the kernelArnaldo Carvalho de Melo
To pick the changes from: 1b07304c587d ("KVM: nVMX: support descriptor table exits") That adds entries to VMX_EXIT_REASONS, that is used by tools/perf/arch/x86/util/kvm-stat.c. This also picks the changes in: 1dc35dacc16b ("KVM: nVMX: check host CR3 on vmentry and vmexit") But these are not used in 'perf kvm stat', do it just to silence the kernel/tools file cache coherency detector: $ make -C tools/perf make: Entering directory '/home/acme/git/linux/tools/perf' BUILD: Doing 'make -j4' parallel build Warning: arch/x86/include/uapi/asm/vmx.h differs from kernel Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Ladi Prosek <lprosek@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-56uowkk8t5zje49a42asffcy@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-11perf record: Add switch-output time option argumentJiri Olsa
It's now possible to specify the threshold time for perf.data like: $ perf record --switch-output=30s ... Once it's reached, the current data are dumped in to the perf.data.<timestamp> file and session does on. $ perf record --switch-output=30s ... [ perf record: dump data: Woken up 44 times ] [ perf record: Dump perf.data.2017010213043746 ] ... The time is expected to be a number with appended unit character - s/m/h/d. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Acked-by: Wang Nan <wangnan0@huawei.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1483955520-29063-7-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-11perf record: Add switch-output size warningJiri Olsa
Adding switch-output size warning if the requested size of lower than the wakeup ring buffer size. $ perf record --switch-output=1K ls WARNING: switch-output data size lower than wakeup kernel buffer size (258K) expect bigger perf.data sizes ... Signed-off-by: Jiri Olsa <jolsa@kernel.org> Suggested-and-Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/r/1483955520-29063-6-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-11perf record: Add switch-output size option argumentJiri Olsa
It's now possible to specify the threshold size for perf.data like: $ perf record --switch-output=2G ... Once it's reached, the current data are dumped in to the perf.data.<timestamp> file and session does on. $ perf record --switch-output=2G ... [ perf record: dump data: Woken up 7244 times ] [ perf record: Dump perf.data.2017010214093746 ] ... The size is expected to be a number with appended unit character - B/K/M/G. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Acked-by: Wang Nan <wangnan0@huawei.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1483955520-29063-5-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-11perf record: Change switch-output option to take optional argumentJiri Olsa
Next patches will add --switch-output option arguments, changing the option to allow that and adding its default value to 'signal'. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Acked-by: Wang Nan <wangnan0@huawei.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1483955520-29063-4-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-11perf record: Add struct switch_outputJiri Olsa
Next patches will add more --switch-output option arguments, so preparing the data holder. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Acked-by: Wang Nan <wangnan0@huawei.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1483955520-29063-3-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-11perf tools: Add unit_number__scnprintf functionJiri Olsa
Add unit_number__scnprintf function to display size units and use it in -m option info message. Before: $ perf record -m 10M ls rounding mmap pages size to 16777216 bytes (4096 pages) ... After: $ perf record -m 10M ls rounding mmap pages size to 16M (4096 pages) ... Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/r/1483955520-29063-2-git-send-email-jolsa@kernel.org [ Rename it to unit_number__scnprintf for consistency ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-11perf evlist: Fix typo in perf_evlist__start_workload()Soramichi Akiyama
This patch fixes a typo: s/enable to/unable to/ Signed-off-by: Soramichi AKIYAMA <akiyama@m.soramichi.jp> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Namhyung Kim <namhyung.kim@lge.com> Cc: Peter Zijlstra <peterz@infradead.org> Fixes: bcf3145fbeb1 ("perf evlist: Enhance perf_evlist__start_workload()") Link: http://lkml.kernel.org/r/20170110200006.e1f7a766b4faf1f107ae2e1b@m.soramichi.jp [ Wasn't applying, fixed it up by hand, added Fixes: tag ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-11perf trace: Allow specifying list of syscalls and events in -e/--expr/--eventArnaldo Carvalho de Melo
Makes it easier to specify both events and syscalls (to be formatter strace-like), i.e. previously one would have to do: # perf trace -e nanosleep --event sched:sched_switch usleep 1 Now it is possible to do: # perf trace -e nanosleep,sched:sched_switch usleep 1 0.000 ( 0.021 ms): usleep/17962 nanosleep(rqtp: 0x7ffdedd61ec0) ... 0.021 ( ): sched:sched_switch:usleep:17962 [120] S ==> swapper/1:0 [120]) 0.000 ( 0.066 ms): usleep/17962 ... [continued]: nanosleep()) = 0 # The old style --expr and using both -e and --event continues to work. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Milian Wolff <milian.wolff@kdab.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-ieg6bakub4657l9e6afn85r4@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-11perf kallsyms: Introduce tool to look for extended symbol information on the ↵Arnaldo Carvalho de Melo
running kernel Its similar to doing grep on a /proc/kallsyms, but it also shows extra information like the path to the kernel module and the unrelocated addresses in it, to help in diagnosing problems. It is also helps demonstrate the use of the symbols routines so that tool writers can use them more effectively. Using it: $ perf kallsyms e1000_xmit_frame netif_rx usb_stor_set_xfer_buf e1000_xmit_frame: [e1000e] /lib/modules/4.9.0+/kernel/drivers/net/ethernet/intel/e1000e/e1000e.ko 0xffffffffc046fc10-0xffffffffc0470bb0 (0x19c80-0x1ac20) netif_rx: [kernel] [kernel.kallsyms] 0xffffffff916f03a0-0xffffffff916f0410 (0xffffffff916f03a0-0xffffffff916f0410) usb_stor_set_xfer_buf: [usb_storage] /lib/modules/4.9.0+/kernel/drivers/usb/storage/usb-storage.ko 0xffffffffc057aea0-0xffffffffc057af19 (0xf10-0xf89) $ Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-79bk9pakujn4l4vq0f90klv3@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-11perf machine: Add a kallsyms loading constructorArnaldo Carvalho de Melo
To reduce the boilerplate for searching for functions in the running kernel and modules. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-93iqzayafpaxaguoiwjqezgz@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-11tools lib subcmd: Add missing linux/kernel.h include to subcmd.hArnaldo Carvalho de Melo
As it was getting the BUILD_BUG_ON_ZERO() definition by luck. Cc: Jiri Olsa <jolsa@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Link: http://lkml.kernel.org/n/tip-dh71o31ar72ajck8o2x4aoae@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-11perf jvmti: Create libdir directory before installing libperf-jvmti.soLaura Abbott
The install command for libperf-jvmti.so does not check if libdir exists before installing. This means that when the install command is run: install libperf-jvmti.so '/tmp/test_root/usr/lib64'; libperf-jvmti.so will get installed to /usr/lib64 as a file and break further installation. Fix this by ensuring the directory gets created first. See https://bugzilla.redhat.com/show_bug.cgi?id=1410296 Signed-off-by: Laura Abbott <labbott@redhat.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Fixes: d4dfdf00d43e ("perf jvmti: Plug compilation into perf build") Link: http://lkml.kernel.org/r/1483741088-13543-1-git-send-email-labbott@redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-11perf/x86/intel: Use ULL constant to prevent undefined shift behaviourColin King
When x86_pmu.num_counters is 32 the shift of the integer constant 1 is exceeding 32bit and therefor undefined behaviour. Fix this by shifting 1ULL instead of 1. Reported-by: CoverityScan CID#1192105 ("Bad bit shift operation") Signed-off-by: Colin Ian King <colin.king@canonical.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Kan Liang <kan.liang@intel.com> Cc: Stephane Eranian <eranian@google.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Link: http://lkml.kernel.org/r/20170111114310.17928-1-colin.king@canonical.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2017-01-11perf/x86/intel/uncore: Fix hardcoded socket 0 assumption in the Haswell init ↵Prarit Bhargava
code hswep_uncore_cpu_init() uses a hardcoded physical package id 0 for the boot cpu. This works as long as the boot CPU is actually on the physical package 0, which is normaly the case after power on / reboot. But it fails with a NULL pointer dereference when a kdump kernel is started on a secondary socket which has a different physical package id because the locigal package translation for physical package 0 does not exist. Use the logical package id of the boot cpu instead of hard coded 0. [ tglx: Rewrote changelog once more ] Fixes: cf6d445f6897 ("perf/x86/uncore: Track packages, not per CPU data") Signed-off-by: Prarit Bhargava <prarit@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Borislav Petkov <bp@suse.de> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Harish Chegondi <harish.chegondi@intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Kan Liang <kan.liang@intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Cc: stable@vger.kernel.org Link: http://lkml.kernel.org/r/1483628965-2890-1-git-send-email-prarit@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2017-01-05perf/x86: Set pmu->module in Intel PMU modulesDavid Carrillo-Cisneros
The conversion of Intel PMU drivers into modules did not include reference counting. The machine will crash when attempting to access deleted code if an event from a module PMU is started and the module removed before the event is destroyed. i.e. this crashes the machine: $ insmod intel-rapl-perf.ko $ perf stat -e power/energy-cores/ -C 0 & $ rmmod intel-rapl-perf.ko Set THIS_MODULE to pmu->module in Intel module PMUs so that generic code can handle reference counting and deny rmmod while an event still exists. Signed-off-by: David Carrillo-Cisneros <davidcc@google.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Borislav Petkov <bp@suse.de> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Kan Liang <kan.liang@intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Turner <pjt@google.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1482455860-116269-1-git-send-email-davidcc@google.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-05Merge tag 'perf-urgent-for-mingo-4.10-20170104' of ↵Ingo Molnar
git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent Pull perf/urgent fixes and one improvement from Arnaldo Carvalho de Melo: Fixes: - Fix prev/next_prio formatting for deadline tasks in libtraceevent (Daniel Bristot de Oliveira) - Robustify reading of build-ids from /sys/kernel/note (Arnaldo Carvalho de Melo) - Fix building some sample/bpf in Alpine Linux 3.4 (Arnaldo Carvalho de Melo) - Fix 'make install-bin' to install libtraceevent plugins (Arnaldo Carvalho de Melo) - Fix 'perf record --switch-output' documentation and comment (Jiri Olsa) - Fix 'perf probe' for cross arch probing (Masami Hiramatsu) Improvement: - Show total scheduling time in 'perf sched timehist' (Namhyumg Kim) Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-04perf probe: Fix to probe on gcc generated symbols for offline kernelMasami Hiramatsu
Fix perf-probe to show probe definition on gcc generated symbols for offline kernel (including cross-arch kernel image). gcc sometimes optimizes functions and generate new symbols with suffixes such as ".constprop.N" or ".isra.N" etc. Since those symbol names are not recorded in DWARF, we have to find correct generated symbols from offline ELF binary to probe on it (kallsyms doesn't correct it). For online kernel or uprobes we don't need it because those are rebased on _text, or a section relative address. E.g. Without this: $ perf probe -k build-arm/vmlinux -F __slab_alloc* __slab_alloc.constprop.9 $ perf probe -k build-arm/vmlinux -D __slab_alloc p:probe/__slab_alloc __slab_alloc+0 If you put above definition on target machine, it should fail because there is no __slab_alloc in kallsyms. With this fix, perf probe shows correct probe definition on __slab_alloc.constprop.9: $ perf probe -k build-arm/vmlinux -D __slab_alloc p:probe/__slab_alloc __slab_alloc.constprop.9+0 Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/148350060434.19001.11864836288580083501.stgit@devbox Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-04perf probe: Fix --funcs to show correct symbols for offline moduleMasami Hiramatsu
Fix --funcs (-F) option to show correct symbols for offline module. Since previous perf-probe uses machine__findnew_module_map() for offline module, even if user passes a module file (with full path) which is for other architecture, perf-probe always tries to load symbol map for current kernel module. This fix uses dso__new_map() to load the map from given binary as same as a map for user applications. Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/148350053478.19001.15435255244512631545.stgit@devbox Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-03perf symbols: Robustify reading of build-id from sysfsArnaldo Carvalho de Melo
Markus reported that perf segfaults when reading /sys/kernel/notes from a kernel linked with GNU gold, due to what looks like a gold bug, so do some bounds checking to avoid crashing in that case. Reported-by: Markus Trippelsdorf <markus@trippelsdorf.de> Report-Link: http://lkml.kernel.org/r/20161219161821.GA294@x4 Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-ryhgs6a6jxvz207j2636w31c@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-03perf tools: Install tools/lib/traceevent plugins with install-binArnaldo Carvalho de Melo
Those are binaries as well, so should be installed by: make -C tools/perf install-bin' too. Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Daniel Bristot de Oliveira <bristot@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Steven Rostedt <rostedt@goodmis.org> Link: http://lkml.kernel.org/n/tip-3841b37u05evxrs1igkyu6ks@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-03tools lib traceevent: Fix prev/next_prio for deadline tasksDaniel Bristot de Oliveira
Currently, the sched:sched_switch tracepoint reports deadline tasks with priority -1. But when reading the trace via perf script I've got the following output: # ./d & # (d is a deadline task, see [1]) # perf record -e sched:sched_switch -a sleep 1 # perf script ... swapper 0 [000] 2146.962441: sched:sched_switch: swapper/0:0 [120] R ==> d:2593 [4294967295] d 2593 [000] 2146.972472: sched:sched_switch: d:2593 [4294967295] R ==> g:2590 [4294967295] The task d reports the wrong priority [4294967295]. This happens because the "int prio" is stored in an unsigned long long val. Although it is set as a %lld, as int is shorter than unsigned long long, trace_seq_printf prints it as a positive number. The fix is just to cast the val as an int, and print it as a %d, as in the sched:sched_switch tracepoint's "format". The output with the fix is: # ./d & # perf record -e sched:sched_switch -a sleep 1 # perf script ... swapper 0 [000] 4306.374037: sched:sched_switch: swapper/0:0 [120] R ==> d:10941 [-1] d 10941 [000] 4306.383823: sched:sched_switch: d:10941 [-1] R ==> swapper/0:0 [120] [1] d.c --- #include <stdio.h> #include <unistd.h> #include <sys/syscall.h> #include <linux/types.h> #include <linux/sched.h> struct sched_attr { __u32 size, sched_policy; __u64 sched_flags; __s32 sched_nice; __u32 sched_priority; __u64 sched_runtime, sched_deadline, sched_period; }; int sched_setattr(pid_t pid, const struct sched_attr *attr, unsigned int flags) { return syscall(__NR_sched_setattr, pid, attr, flags); } int main(void) { struct sched_attr attr = { .size = sizeof(attr), .sched_policy = SCHED_DEADLINE, /* This creates a 10ms/30ms reservation */ .sched_runtime = 10 * 1000 * 1000, .sched_period = attr.sched_deadline = 30 * 1000 * 1000, }; if (sched_setattr(0, &attr, 0) < 0) { perror("sched_setattr"); return -1; } for(;;); } --- Committer notes: Got the program from the provided URL, http://bristot.me/lkml/d.c, trimmed it and included in the cset log above, so that we have everything needed to test it in one place. Signed-off-by: Daniel Bristot de Oliveira <bristot@redhat.com> Acked-by: Steven Rostedt <rostedt@goodmis.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Daniel Bristot de Oliveira <bristot@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/866ef75bcebf670ae91c6a96daa63597ba981f0d.1483443552.git.bristot@redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-03perf record: Fix --switch-output documentation and commentJiri Olsa
There's no --signal-trigger option, also adding the code comment into record man page. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Wang Nan <wangnan0@huawei.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1483431600-19887-4-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-03perf record: Make __record_options staticJiri Olsa
There's no need for this one to be global. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Wang Nan <wangnan0@huawei.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1483431600-19887-3-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-03tools lib subcmd: Add OPT_STRING_OPTARG_SET optionJiri Olsa
To allow string options with a default argument and variable set when the option is used. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Wang Nan <wangnan0@huawei.com> Cc: David Ahern <dsahern@gmail.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1483431600-19887-2-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-02perf probe: Fix to get correct modname from elf headerMasami Hiramatsu
Since 'perf probe' supports cross-arch probes, it is possible to analyze different arch kernel image which has different bits-per-long. In that case, it fails to get the module name because it uses the MOD_NAME_OFFSET macro based on the host machine bits-per-long, instead of the target arch bits-per-long. This fixes above issue by changing modname-offset based on the target archs bit width. This is ok because linux kernel uses LP64 model on 64bit arch. E.g. without this (on x86_64, and target module is arm32): $ perf probe -m build-arm/fs/configfs/configfs.ko -D configfs_lookup p:probe/configfs_lookup :configfs_lookup+0 ^-Here is an empty module name. With this fix, you can see correct module name: $ perf probe -m build-arm/fs/configfs/configfs.ko -D configfs_lookup p:probe/configfs_lookup configfs:configfs_lookup+0 Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/148337043836.6752.383495516397005695.stgit@devbox Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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