From e498f336d66f804f87787b2ec31821e349a37b7b Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Fri, 4 Aug 2017 17:06:26 -0300 Subject: perf test shell: Add test using vfs_getname + 'perf trace' Uses the 'perf test shell' library to add probe:vfs_getname to the system then use it with 'perf trace' using 'touch' to write to a temp file, then checks that that was captured by the vfs_getname was used by 'perf trace', that already handles "probe:vfs_getname" if present, and used in the "open" syscall "filename" argument beautifier. Testing it: # perf test "trace + vfs_getname" 61: Check open filename arg using perf trace + vfs_getname: Ok # # perf test -v "trace + vfs_getname" 61: Check open filename arg using perf trace + vfs_getname: --- start --- test child forked, pid 30846 Added new event: probe:vfs_getname (on getname_flags:72 with pathname=result->name:string) You can now use it in all perf tools, such as: perf record -e probe:vfs_getname -aR sleep 1 2.237 ( 0.012 ms): touch/30855 open(filename: /tmp/temporary_file.kmoWQ, flags: CREAT|NOCTTY|NONBLOCK|WRONLY, mode: IRUGO|IWUGO) = 3 test child finished with 0 ---- end ---- Check open filename arg using perf trace + vfs_getname: Ok # Cc: Adrian Hunter Cc: David Ahern Cc: Jiri Olsa Cc: Michael Petlan Cc: Namhyung Kim Cc: Thomas Richter Cc: Wang Nan Link: http://lkml.kernel.org/n/tip-j02nobfvvn9c7yrphdsnbqx0@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/tests/shell/trace+probe_vfs_getname.sh | 31 +++++++++++++++++++++++ 1 file changed, 31 insertions(+) create mode 100755 tools/perf/tests/shell/trace+probe_vfs_getname.sh (limited to 'tools/perf/tests/shell') diff --git a/tools/perf/tests/shell/trace+probe_vfs_getname.sh b/tools/perf/tests/shell/trace+probe_vfs_getname.sh new file mode 100755 index 000000000000..d0fba0c5e354 --- /dev/null +++ b/tools/perf/tests/shell/trace+probe_vfs_getname.sh @@ -0,0 +1,31 @@ +# Check open filename arg using perf trace + vfs_getname + +# Uses the 'perf test shell' library to add probe:vfs_getname to the system +# then use it with 'perf trace' using 'touch' to write to a temp file, then +# checks that that was captured by the vfs_getname was used by 'perf trace', +# that already handles "probe:vfs_getname" if present, and used in the +# "open" syscall "filename" argument beautifier. + +# Arnaldo Carvalho de Melo , 2017 + +. $(dirname $0)/lib/probe_vfs_getname.sh + +file=$(mktemp /tmp/temporary_file.XXXXX) + +trace_open_vfs_getname() { + perf trace -e open touch $file 2>&1 | \ + egrep " +[0-9]+\.[0-9]+ +\( +[0-9]+\.[0-9]+ ms\): +touch\/[0-9]+ open\(filename: +${file}, +flags: CREAT\|NOCTTY\|NONBLOCK\|WRONLY, +mode: +IRUGO\|IWUGO\) += +[0-9]+$" +} + + +add_probe_vfs_getname || skip_if_no_debuginfo +err=$? +if [ $err -ne 0 ] ; then + exit $err +fi + +trace_open_vfs_getname +err=$? +rm -f ${file} +cleanup_probe_vfs_getname +exit $err -- cgit v1.2.3