linux-kernel - [tip:perf/core] perf tests shell lib: Use a wildcard to remove the vfs

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Date:   Sat, 17 Feb 2018 03:39:44 -0800
From:   tip-bot for Arnaldo Carvalho de Melo <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     acme@...hat.com, jolsa@...nel.org, wangnan0@...wei.com,
        adrian.hunter@...el.com, hpa@...or.com, tmricht@...ux.vnet.ibm.com,
        dsahern@...il.com, namhyung@...nel.org,
        linux-kernel@...r.kernel.org, tglx@...utronix.de, mingo@...nel.org,
        mhiramat@...nel.org
Subject: [tip:perf/core] perf tests shell lib: Use a wildcard to remove the
 vfs_getname probe

Commit-ID:  21316ac6803d4a1aadd74b896db8d60a92cd1140
Gitweb:     https://git.kernel.org/tip/21316ac6803d4a1aadd74b896db8d60a92cd1140
Author:     Arnaldo Carvalho de Melo <acme@...hat.com>
AuthorDate: Fri, 16 Feb 2018 15:26:51 -0300
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Fri, 16 Feb 2018 15:31:12 -0300

perf tests shell lib: Use a wildcard to remove the vfs_getname probe

In some situations the vfs_getname is being added both as requested and
with a _1 suffix (inlines?):

  probe:vfs_getname_1  (on getname_flags:63@...e/git/linux/fs/namei.c with pathname)

This ends up making the cleanup to miss that one, as it removes just
'probe:vfs_getname', which makes the second test to use this probe point
to fail, since it finds that leftover from the first test, use a
wildcard to remove both.

Before:

  # perf test 60 61 62 63
  60: Use vfs_getname probe to get syscall args filenames   : FAILED!
  61: probe libc's inet_pton & backtrace it with ping       : Ok
  62: Check open filename arg using perf trace + vfs_getname: FAILED!
  63: Add vfs_getname probe to get syscall args filenames   : Ok

After:

  # perf test 60 61 62 63
  60: Use vfs_getname probe to get syscall args filenames   : Ok
  61: probe libc's inet_pton & backtrace it with ping       : Ok
  62: Check open filename arg using perf trace + vfs_getname: Ok
  63: Add vfs_getname probe to get syscall args filenames   : Ok
  #

Cc: Adrian Hunter <adrian.hunter@...el.com>
Cc: David Ahern <dsahern@...il.com>
Cc: Jiri Olsa <jolsa@...nel.org>
Cc: Masami Hiramatsu <mhiramat@...nel.org>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Thomas Richter <tmricht@...ux.vnet.ibm.com>
Cc: Wang Nan <wangnan0@...wei.com>
Link: https://lkml.kernel.org/n/tip-2k5kutwr4ds36adiakyb4yvy@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/tests/shell/lib/probe_vfs_getname.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/tests/shell/lib/probe_vfs_getname.sh b/tools/perf/tests/shell/lib/probe_vfs_getname.sh
index 30a950c..1c16e56 100644
--- a/tools/perf/tests/shell/lib/probe_vfs_getname.sh
+++ b/tools/perf/tests/shell/lib/probe_vfs_getname.sh
@@ -5,7 +5,7 @@ had_vfs_getname=$?
 
 cleanup_probe_vfs_getname() {
 	if [ $had_vfs_getname -eq 1 ] ; then
-		perf probe -q -d probe:vfs_getname
+		perf probe -q -d probe:vfs_getname*
 	fi
 }