Messages in this thread Patch in this message | | | Date | Tue, 10 May 2022 14:18:44 -0300 | From | Arnaldo Carvalho de Melo <> | Subject | Re: [PATCH V2 01/23] perf intel-pt: Add a test for system-wide side band |
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Em Fri, May 06, 2022 at 03:25:39PM +0300, Adrian Hunter escreveu: > Add a test for system-wide side band even when tracing selected CPUs. > > Tested-by: Ian Rogers <irogers@google.com> > Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
[root@quaco ~]# uname -a Linux quaco 5.16.13-200.fc35.x86_64 #1 SMP PREEMPT Tue Mar 8 22:50:58 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux [root@quaco ~]# grep -m1 -i "model name" /proc/cpuinfo model name : Intel(R) Core(TM) i7-8650U CPU @ 1.90GHz [root@quaco ~]# perf test -v Misc 97: Miscellaneous Intel PT testing : --- start --- test child forked, pid 769475 [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 1.352 MB /tmp/tmp.Ty4Rqnz4vz ] [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 1.352 MB /tmp/tmp.Ty4Rqnz4vz ] Linux [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 1.446 MB /tmp/tmp.TnEqenwzZv ] Failed to record MMAP events on CPU 1 when tracing CPU 0 test child finished with -1 ---- end ---- Miscellaneous Intel PT testing: FAILED! [root@quaco ~]#
Do I need some more recent machine or kernel?
- Arnaldo
> --- > tools/perf/tests/shell/test_intel_pt.sh | 71 +++++++++++++++++++++++++ > 1 file changed, 71 insertions(+) > create mode 100755 tools/perf/tests/shell/test_intel_pt.sh > > diff --git a/tools/perf/tests/shell/test_intel_pt.sh b/tools/perf/tests/shell/test_intel_pt.sh > new file mode 100755 > index 000000000000..a3298643884d > --- /dev/null > +++ b/tools/perf/tests/shell/test_intel_pt.sh > @@ -0,0 +1,71 @@ > +#!/bin/sh > +# Miscellaneous Intel PT testing > +# SPDX-License-Identifier: GPL-2.0 > + > +set -e > + > +# Skip if no Intel PT > +perf list | grep -q 'intel_pt//' || exit 2 > + > +skip_cnt=0 > +ok_cnt=0 > +err_cnt=0 > + > +tmpfile=`mktemp` > +perfdatafile=`mktemp` > + > +can_cpu_wide() > +{ > + perf record -o ${tmpfile} -B -N --no-bpf-event -e dummy:u -C $1 true 2>&1 >/dev/null || return 2 > + return 0 > +} > + > +test_system_wide_side_band() > +{ > + # Need CPU 0 and CPU 1 > + can_cpu_wide 0 || return $? > + can_cpu_wide 1 || return $? > + > + # Record on CPU 0 a task running on CPU 1 > + perf record -B -N --no-bpf-event -o ${perfdatafile} -e intel_pt//u -C 0 -- taskset --cpu-list 1 uname > + > + # Should get MMAP events from CPU 1 because they can be needed to decode > + mmap_cnt=`perf script -i ${perfdatafile} --no-itrace --show-mmap-events -C 1 2>/dev/null | grep MMAP | wc -l` > + > + if [ ${mmap_cnt} -gt 0 ] ; then > + return 0 > + fi > + > + echo "Failed to record MMAP events on CPU 1 when tracing CPU 0" > + return 1 > +} > + > +count_result() > +{ > + if [ $1 -eq 2 ] ; then > + skip_cnt=`expr ${skip_cnt} \+ 1` > + return > + fi > + if [ $1 -eq 0 ] ; then > + ok_cnt=`expr ${ok_cnt} \+ 1` > + return > + fi > + err_cnt=`expr ${err_cnt} \+ 1` > +} > + > +test_system_wide_side_band > + > +count_result $? > + > +rm -f ${tmpfile} > +rm -f ${perfdatafile} > + > +if [ ${err_cnt} -gt 0 ] ; then > + exit 1 > +fi > + > +if [ ${ok_cnt} -gt 0 ] ; then > + exit 0 > +fi > + > +exit 2 > -- > 2.25.1 --
- Arnaldo
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