From b29edf35ef7022a6f72695106a6e91f67d00c9e9 Mon Sep 17 00:00:00 2001 From: Adrian Hunter Date: Wed, 11 Aug 2021 13:10:34 +0300 Subject: [PATCH] perf dlfilter: Amend documentation wrt library dependencies Like all locally-built programs, dlfilters may need to be re-built if shared libraries they use change. Also there may be unexpected results if the dfilter uses different versions of the shared libraries that perf uses. Note those things in the documentation. Signed-off-by: Adrian Hunter Cc: Jiri Olsa Link: https //lore.kernel.org/r/20210811101036.17986-5-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/Documentation/perf-dlfilter.txt | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/tools/perf/Documentation/perf-dlfilter.txt b/tools/perf/Documentation/perf-dlfilter.txt index ece0750..594f5a5 100644 --- a/tools/perf/Documentation/perf-dlfilter.txt +++ b/tools/perf/Documentation/perf-dlfilter.txt @@ -246,6 +246,14 @@ To use the filter with perf script: perf script --dlfilter dlfilter-example.so +NOTES +----- + +The dlfilter .so file will be dependent on shared libraries. If those change, +it may be necessary to rebuild the .so. Also there may be unexpected results +if the .so uses different versions of the shared libraries that perf uses. +Versions can be checked using the ldd command. + SEE ALSO -------- linkperf:perf-script[1] -- 2.7.4