Messages in this thread Patch in this message | | | From | Arnaldo Carvalho de Melo <> | Subject | [PATCH 10/19] perf test shell: Add 'probe_vfs_getname' shell test | Date | Mon, 14 Aug 2017 13:27:32 -0300 |
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From: Arnaldo Carvalho de Melo <acme@redhat.com>
First perf shell test:
# perf test vfs_getname 60: Add vfs_getname probe to get syscall args filenames: Ok #
In verbose mode:
# perf test -v vfs_getname 60: Add vfs_getname probe to get syscall args filenames: --- start --- test child forked, pid 19146 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
test child finished with 0 ---- end ---- Add vfs_getname probe to get syscall args filenames: Ok #
And if the vmlinux file is not found:
# mv ../build/v4.12.0-rc6+/vmlinux ../build/v4.12.0-rc6+/vmlinux.hidden # perf test vfs_getname 60: Add vfs_getname probe to get syscall args filenames: Skip #
Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Michael Petlan <mpetlan@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Thomas Richter <tmricht@linux.vnet.ibm.com> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-8f3n22c1yn516ev30s603ow2@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> --- tools/perf/tests/shell/probe_vfs_getname.sh | 30 +++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) create mode 100755 tools/perf/tests/shell/probe_vfs_getname.sh
diff --git a/tools/perf/tests/shell/probe_vfs_getname.sh b/tools/perf/tests/shell/probe_vfs_getname.sh new file mode 100755 index 000000000000..d5f5248de927 --- /dev/null +++ b/tools/perf/tests/shell/probe_vfs_getname.sh @@ -0,0 +1,30 @@ +# Add vfs_getname probe to get syscall args filenames +# +# Arnaldo Carvalho de Melo <acme@kernel.org>, 2017 + +perf probe -l | grep -q probe:vfs_getname +had_vfs_getname=$? + +cleanup_probe_vfs_getname() { + if [ $had_vfs_getname -eq 1 ] ; then + perf probe -q -d probe:vfs_getname + fi +} + +add_probe_vfs_getname() { + local verbose=$1 + if [ $had_vfs_getname -eq 1 ] ; then + line=$(perf probe -L getname_flags | egrep 'result.*=.*filename;' | sed -r 's/[[:space:]]+([[:digit:]]+)[[:space:]]+result->uptr.*/\1/') + perf probe $verbose "vfs_getname=getname_flags:${line} pathname=result->name:string" + fi +} + +skip_if_no_debuginfo() { + add_probe_vfs_getname -v 2>&1 | grep -q "^Failed to find the path for kernel" && return 2 + return 1 +} + +add_probe_vfs_getname || skip_if_no_debuginfo +err=$? +cleanup_probe_vfs_getname +exit $err -- 2.13.4
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