diff options
author | Ingo Molnar <mingo@kernel.org> | 2019-11-29 06:56:05 +0100 |
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committer | Ingo Molnar <mingo@kernel.org> | 2019-11-29 06:56:05 +0100 |
commit | e680a41fcaf07ccac8817c589fc4824988b48eac (patch) | |
tree | 8993cdfbd30e3d95162c53bc6af4e410360f99a8 /tools/perf/tests/thread-maps-share.c | |
parent | 405b45376de90b3027aaf8c4de035c6bb721fa7e (diff) | |
parent | 5172672da02e483d9b3c4d814c3482d0c8ffb1a6 (diff) |
Merge tag 'perf-core-for-mingo-5.5-20191128' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent
Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo:
perf script:
Adrian Hunter:
- Fix brstackinsn for AUXTRACE.
- Fix invalid LBR/binary mismatch error.
perf diff:
Arnaldo Carvalho de Melo:
- Use llabs() with 64-bit values, fixing the build in some 32-bit
architectures.
perf pmu:
Andi Kleen:
- Use file system cache to optimize sysfs access.
x86:
Adrian Hunter:
- Add some more Intel instructions to the opcode map and to the perf
test entry:
gf2p8affineinvqb, gf2p8affineqb, gf2p8mulb, v4fmaddps,
v4fmaddss, v4fnmaddps, v4fnmaddss, vaesdec, vaesdeclast, vaesenc,
vaesenclast, vcvtne2ps2bf16, vcvtneps2bf16, vdpbf16ps,
vgf2p8affineinvqb, vgf2p8affineqb, vgf2p8mulb, vp2intersectd,
vp2intersectq, vp4dpwssd, vp4dpwssds, vpclmulqdq, vpcompressb,
vpcompressw, vpdpbusd, vpdpbusds, vpdpwssd, vpdpwssds, vpexpandb,
vpexpandw, vpopcntb, vpopcntd, vpopcntq, vpopcntw, vpshldd, vpshldq,
vpshldvd, vpshldvq, vpshldvw, vpshldw, vpshrdd, vpshrdq, vpshrdvd,
vpshrdvq, vpshrdvw, vpshrdw, vpshufbitqmb.
perf affinity:
Andi Kleen:
- Add infrastructure to save/restore affinity
perf maps:
Arnaldo Carvalho de Melo:
- Merge 'struct maps' with 'struct map_groups', as there is a
1x1 relationship, simplifying code overal.
perf build:
Jiri Olsa:
- Allow to link with libbpf dynamicaly.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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; +} |