Messages in this thread | | | Date | Tue, 9 May 2023 15:10:58 -0300 | From | Arnaldo Carvalho de Melo <> | Subject | Re: [PATCH] perf/test: reduce run time of perf test Test java symbol |
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Em Tue, May 09, 2023 at 10:34:44AM -0700, Ian Rogers escreveu: > On Tue, May 9, 2023 at 6:19 AM Thomas Richter <tmricht@linux.ibm.com> wrote: > > > > Test case Test java symbol might run a long time. On Fedora 38 the > > run time is very, very long: > > > > Output before: > > # time ./perf test 108 > > 108: Test java symbol : Ok > > real 22m15.775s > > user 3m42.584s > > sys 4m30.685s > > # > > > > The reason is a lookup for the server for debug symbols as shown in > > # cat /etc/debuginfod/elfutils.urls > > https://debuginfod.fedoraproject.org/ > > # > > This lookup is done for every symbol/sample, so about 3500 lookups > > will take place. > > To omit this lookup, which is not needed, unset environment variable > > DEBUGINFOD_URLS=''. > > > > Output after: > > # time ./perf test 108 > > 108: Test java symbol : Ok > > > > real 0m6.242s > > user 0m4.982s > > sys 0m3.243s > > # > > > > Signed-off-by: Thomas Richter <tmricht@linux.ibm.com> > > Cc: leo.yan@linaro.org > > Cc: irogers@google.com > > --- > > tools/perf/tests/shell/test_java_symbol.sh | 2 +- > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > > diff --git a/tools/perf/tests/shell/test_java_symbol.sh b/tools/perf/tests/shell/test_java_symbol.sh > > index 90cea8811926..499539d1c479 100755 > > --- a/tools/perf/tests/shell/test_java_symbol.sh > > +++ b/tools/perf/tests/shell/test_java_symbol.sh > > @@ -56,7 +56,7 @@ if [ $? -ne 0 ]; then > > exit 1 > > fi > > > > -if ! perf inject -i $PERF_DATA -o $PERF_INJ_DATA -j; then > > +if ! DEBUGINFOD_URLS='' perf inject -i $PERF_DATA -o $PERF_INJ_DATA -j; then > > Jiri, is this the best way to workaround a debuginfod slowness?
I noticed this delay, It is good that someone worked on rootcausing this excessive delay, thanks Thomas.
I'll test it now.
- Arnaldo
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