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perf test: test_intel_pt.sh: Tidy some perf record options 

When not decoding, the options "-B -N --no-bpf-event" speed up perf record.
Make a common function for them.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/20221014170905.64069-3-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Adrian Hunter 2022-10-14 20:09:00 +03:00 committed by Arnaldo Carvalho de Melo
parent e408049287
commit 5021d82bca
1 changed files with 12 additions and 4 deletions
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16
tools/perf/tests/shell/test_intel_pt.sh
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@ -42,6 +42,14 @@ trap_cleanup()
trap trap_cleanup EXIT TERM INT
# perf record for testing without decoding
perf_record_no_decode()
{
# Options to speed up recording: no post-processing, no build-id cache update,
# and no BPF events.
perf record -B -N --no-bpf-event "$@"
}
have_workload=false
cat << _end_of_file_ | /usr/bin/cc -o "${workload}" -xc - -pthread && have_workload=true
#include <time.h>
@ -76,7 +84,7 @@ _end_of_file_
can_cpu_wide()
{
echo "Checking for CPU-wide recording on CPU $1"
if ! perf record -o "${tmpfile}" -B -N --no-bpf-event -e dummy:u -C "$1" true >/dev/null 2>&1 ; then
if ! perf_record_no_decode -o "${tmpfile}" -e dummy:u -C "$1" true >/dev/null 2>&1 ; then
echo "No so skipping"
return 2
fi
@ -93,7 +101,7 @@ test_system_wide_side_band()
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
perf_record_no_decode -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 "${perfdatafile}" --no-itrace --show-mmap-events -C 1 2>/dev/null | grep -c MMAP)
@ -109,7 +117,7 @@ test_system_wide_side_band()
can_kernel()
{
perf record -o "${tmpfile}" -B -N --no-bpf-event -e dummy:k true >/dev/null 2>&1 || return 2
perf_record_no_decode -o "${tmpfile}" -e dummy:k true >/dev/null 2>&1 || return 2
return 0
}
@ -235,7 +243,7 @@ test_per_thread()
wait_for_threads ${w1} 2
wait_for_threads ${w2} 2
perf record -B -N --no-bpf-event -o "${perfdatafile}" -e intel_pt//u"${k}" -vvv --per-thread -p "${w1},${w2}" 2>"${errfile}" >"${outfile}" &
perf_record_no_decode -o "${perfdatafile}" -e intel_pt//u"${k}" -vvv --per-thread -p "${w1},${w2}" 2>"${errfile}" >"${outfile}" &
ppid=$!
echo "perf PID is $ppid"
wait_for_perf_to_start ${ppid} "${errfile}" || return 1