Re: [PATCH 2/2] perf test: Add perf record sample filtering test

From: Arnaldo Carvalho de Melo
Date: Tue Aug 15 2023 - 13:42:48 EST


Em Tue, Aug 15, 2023 at 02:30:18PM -0300, Arnaldo Carvalho de Melo escreveu:
> Em Thu, Aug 10, 2023 at 07:58:22PM -0700, Namhyung Kim escreveu:
> > $ sudo ./perf test 'sample filter' -v
> > 94: perf record sample filtering (by BPF) tests :
> > --- start ---
> > test child forked, pid 3817527
> > Checking BPF-filter privilege
> > Basic bpf-filter test
> > Basic bpf-filter test [Success]
> > Failing bpf-filter test
> > Error: task-clock event does not have PERF_SAMPLE_CPU
> > Failing bpf-filter test [Success]
> > Group bpf-filter test
> > Error: task-clock event does not have PERF_SAMPLE_CPU
> > Error: task-clock event does not have PERF_SAMPLE_CODE_PAGE_SIZE
> > Group bpf-filter test [Success]
> > test child finished with 0
> > ---- end ----
> > perf record sample filtering (by BPF) tests: Ok
>
> [root@five ~]# perf test -v "by BPF"
> 91: perf record sample filtering (by BPF) tests :
> --- start ---
> test child forked, pid 64165
> Checking BPF-filter privilege
> Basic bpf-filter test
> ffffffff97f4f688
> ffffffff97f73859
> ffffffff97412ce6
> ffffffff976da215
> ffffffff973a92bf
> ffffffff97376ad7
> ffffffff97f73859
<SNIP
> ffffffff971fdca5
> ffffffff9737dbc4
> ffffffff971b4e04
> Basic bpf-filter test [Failed invalid output]
> test child finished with -1
> ---- end ----
> perf record sample filtering (by BPF) tests: FAILED!
> [root@five ~]#
>
> [root@five ~]# uname -a
> Linux five 6.2.15-100.fc36.x86_64 #1 SMP PREEMPT_DYNAMIC Thu May 11 16:51:53 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux
> [root@five ~]#

Above was on a AMD Ryzen 5950X, the following was on a lenovo t480s,
Intel notebook:

[root@quaco ~]# uname -a
Linux quaco 6.4.7-200.fc38.x86_64 #1 SMP PREEMPT_DYNAMIC Thu Jul 27 20:01:18 UTC 2023 x86_64 GNU/Linux
[root@quaco ~]# perf test "filter"
30: Filter hist entries : Ok
36: Filter fds with revents mask in a fdarray : Ok
67: dlfilter C API : Ok
91: perf record sample filtering (by BPF) tests : Ok
[root@quaco ~]# perf test -v "by BPF"
91: perf record sample filtering (by BPF) tests :
--- start ---
test child forked, pid 273609
Checking BPF-filter privilege
Basic bpf-filter test
Basic bpf-filter test [Success]
Failing bpf-filter test
Error: task-clock event does not have PERF_SAMPLE_CPU
Failing bpf-filter test [Success]
Group bpf-filter test
Error: task-clock event does not have PERF_SAMPLE_CPU
Error: task-clock event does not have PERF_SAMPLE_CODE_PAGE_SIZE
Group bpf-filter test [Success]
test child finished with 0
---- end ----
perf record sample filtering (by BPF) tests: Ok
[root@quaco ~]#