selftests/bpf: Add threads to consumer test

Browse source

With recent uprobe fix [1] the sync time after unregistering uprobe is
much longer and prolongs the consumer test which creates and destroys
hundreds of uprobes.

This change adds 16 threads (which fits the test logic) and speeds up
the test.

Before the change:

  # perf stat --null ./test_progs -t uprobe_multi_test/consumers
  #421/9   uprobe_multi_test/consumers:OK
  #421     uprobe_multi_test:OK
  Summary: 1/1 PASSED, 0 SKIPPED, 0 FAILED

   Performance counter stats for './test_progs -t uprobe_multi_test/consumers':

        28.818778973 seconds time elapsed

         0.745518000 seconds user
         0.919186000 seconds sys

After the change:

  # perf stat --null ./test_progs -t uprobe_multi_test/consumers 2>&1
  #421/9   uprobe_multi_test/consumers:OK
  #421     uprobe_multi_test:OK
  Summary: 1/1 PASSED, 0 SKIPPED, 0 FAILED

   Performance counter stats for './test_progs -t uprobe_multi_test/consumers':

         3.504790814 seconds time elapsed

         0.012141000 seconds user
         0.751760000 seconds sys

[1] commit 87195a1ee3 ("uprobes: switch to RCU Tasks Trace flavor for better performance")

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20241108134544.480660-14-jolsa@kernel.org

...

This commit is contained in:

Jiri Olsa 2024-11-08 14:45:44 +01:00 • committed by Andrii Nakryiko

parent b1c570adc7

commit abaec8341a

1 changed files with 80 additions and 18 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

98

tools/testing/selftests/bpf/prog_tests/uprobe_multi_test.c

View file