diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2019-12-01 18:49:57 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-12-01 18:49:57 -0800 |
commit | b7fcf31f7036895ca8fc3a30eefffab0e82f75f6 (patch) | |
tree | de2480af1cb8213dd32f56ab596759a76ec7bd57 /tools/perf/tests/thread-maps-share.c | |
parent | 72c0870e3a05d9cd5466d08c3d2a3069ed0a2f9f (diff) | |
parent | e680a41fcaf07ccac8817c589fc4824988b48eac (diff) |
Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fixes from Ingo Molnar:
- Make /sys/devices/cpu/rdpmc based RDPMC enforcement more
instantaneous
- decoder: Update the Intel opcode map
- Various tooling fixes, including a few late optimizations and
cleanups.
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (23 commits)
perf script: Fix invalid LBR/binary mismatch error
perf script: Fix brstackinsn for AUXTRACE
perf affinity: Add infrastructure to save/restore affinity
perf pmu: Use file system cache to optimize sysfs access
perf regs: Make perf_reg_name() return "unknown" instead of NULL
perf diff: Use llabs() with 64-bit values
perf diff: Use llabs() with 64-bit values
perf/x86: Implement immediate enforcement of /sys/devices/cpu/rdpmc value of 0
perf tools: Allow to link with libbpf dynamicaly
perf tests: Rename tests/map_groups.c to tests/maps.c
perf tests: Rename thread-mg-share to thread-maps-share
perf maps: Rename map_groups.h to maps.h
perf maps: Rename 'mg' variables to 'maps'
perf map_symbol: Rename ms->mg to ms->maps
perf addr_location: Rename al->mg to al->maps
perf thread: Rename thread->mg to thread->maps
perf maps: Merge 'struct maps' with 'struct map_groups'
x86/insn: perf tools: Add some more instructions to the new instructions test
x86/insn: Add some more Intel instructions to the opcode map
perf map: Remove unused functions
...
Diffstat (limited to 'tools/perf/tests/thread-maps-share.c')
-rw-r--r-- | tools/perf/tests/thread-maps-share.c | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/tools/perf/tests/thread-maps-share.c b/tools/perf/tests/thread-maps-share.c new file mode 100644 index 000000000000..9371484973f2 --- /dev/null +++ b/tools/perf/tests/thread-maps-share.c @@ -0,0 +1,98 @@ +// SPDX-License-Identifier: GPL-2.0 +#include "tests.h" +#include "machine.h" +#include "thread.h" +#include "debug.h" + +int test__thread_maps_share(struct test *test __maybe_unused, int subtest __maybe_unused) +{ + struct machines machines; + struct machine *machine; + + /* thread group */ + struct thread *leader; + struct thread *t1, *t2, *t3; + struct maps *maps; + + /* other process */ + struct thread *other, *other_leader; + struct maps *other_maps; + + /* + * This test create 2 processes abstractions (struct thread) + * with several threads and checks they properly share and + * maintain maps info (struct maps). + * + * thread group (pid: 0, tids: 0, 1, 2, 3) + * other group (pid: 4, tids: 4, 5) + */ + + machines__init(&machines); + machine = &machines.host; + + /* create process with 4 threads */ + leader = machine__findnew_thread(machine, 0, 0); + t1 = machine__findnew_thread(machine, 0, 1); + t2 = machine__findnew_thread(machine, 0, 2); + t3 = machine__findnew_thread(machine, 0, 3); + + /* and create 1 separated process, without thread leader */ + other = machine__findnew_thread(machine, 4, 5); + + TEST_ASSERT_VAL("failed to create threads", + leader && t1 && t2 && t3 && other); + + maps = leader->maps; + TEST_ASSERT_EQUAL("wrong refcnt", refcount_read(&maps->refcnt), 4); + + /* test the maps pointer is shared */ + TEST_ASSERT_VAL("maps don't match", maps == t1->maps); + TEST_ASSERT_VAL("maps don't match", maps == t2->maps); + TEST_ASSERT_VAL("maps don't match", maps == t3->maps); + + /* + * Verify the other leader was created by previous call. + * It should have shared maps with no change in + * refcnt. + */ + other_leader = machine__find_thread(machine, 4, 4); + TEST_ASSERT_VAL("failed to find other leader", other_leader); + + /* + * Ok, now that all the rbtree related operations were done, + * lets remove all of them from there so that we can do the + * refcounting tests. + */ + machine__remove_thread(machine, leader); + machine__remove_thread(machine, t1); + machine__remove_thread(machine, t2); + machine__remove_thread(machine, t3); + machine__remove_thread(machine, other); + machine__remove_thread(machine, other_leader); + + other_maps = other->maps; + TEST_ASSERT_EQUAL("wrong refcnt", refcount_read(&other_maps->refcnt), 2); + + TEST_ASSERT_VAL("maps don't match", other_maps == other_leader->maps); + + /* release thread group */ + thread__put(leader); + TEST_ASSERT_EQUAL("wrong refcnt", refcount_read(&maps->refcnt), 3); + + thread__put(t1); + TEST_ASSERT_EQUAL("wrong refcnt", refcount_read(&maps->refcnt), 2); + + thread__put(t2); + TEST_ASSERT_EQUAL("wrong refcnt", refcount_read(&maps->refcnt), 1); + + thread__put(t3); + + /* release other group */ + thread__put(other_leader); + TEST_ASSERT_EQUAL("wrong refcnt", refcount_read(&other_maps->refcnt), 1); + + thread__put(other); + + machines__exit(&machines); + return 0; +} |