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Arnaldo Carvalho de Melo 6cc7361440 perf python scripting: Improve the failed-syscalls-by-pid script 
. Print message at script start telling how to get te summary
. Print the syscall name using the audit-lib-python package, if
  installed
. Print the errno string
. Accept both pid (if numeric) or COMM name

Now it looks like this:

[root@emilia ~]# perf trace failed-syscalls-by-pid
Press control+C to stop and show the summary
^C
syscall errors:

comm [pid]                           count
------------------------------  ----------

automount [1670]
  syscall: futex
    err = ETIMEDOUT                     39

irqbalance [1462]
  syscall: openat
    err = ENOENT                         4

perf [7888]
  syscall: lseek
    err = ESPIPE                         1
  syscall: open
    err = ENOENT                        24

perf [7889]
  syscall: ioctl
    err = EINVAL                         1
  syscall: readlink
    err = EINVAL                         2
  syscall: open
    err = ENOENT                       389
  syscall: stat
    err = ENOENT                       141
  syscall: lseek
    err = ESPIPE                         3
[root@emilia ~]#

[root@emilia ~]# perf trace failed-syscalls-by-pid 1670
Press control+C to stop and show the summary
^C
syscall errors:

comm [pid]                           count
------------------------------  ----------

automount [1670]
  syscall: futex
    err = ETIMEDOUT                      2
[root@emilia ~]#
[root@emilia ~]#
[root@emilia ~]#
[root@emilia ~]# perf trace failed-syscalls-by-pid automount
Press control+C to stop and show the summary
^C
syscall errors for automount:

comm [pid]                           count
------------------------------  ----------

automount [1669]
  syscall: futex
    err = ETIMEDOUT                      1

automount [1670]
  syscall: futex
    err = ETIMEDOUT                      5
[root@emilia ~]#

Cc: David S. Miller <davem@davemloft.net>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2010-10-25 18:46:41 -02:00
..
arch Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2010-08-06 09:30:52 -07:00
bench perf options: Check v type in OPT_U?INTEGER 2010-05-17 15:43:38 -03:00
Documentation perf tools: Document event modifiers 2010-10-23 15:31:20 -02:00
scripts perf python scripting: Improve the failed-syscalls-by-pid script 2010-10-25 18:46:41 -02:00
util perf probe: Fix format specified for Dwarf_Off parameter 2010-10-23 15:31:20 -02:00
.gitignore perf tools: .gitignore += config.make config.make.autogen 2010-06-17 10:24:31 -03:00
builtin-annotate.c perf tools: Add --tui and --stdio to choose the UI 2010-08-21 10:49:46 -03:00
builtin-bench.c perf options: Type check all the remaining OPT_ variants 2010-05-17 16:22:41 -03:00
builtin-buildid-cache.c perf buildid: add perfconfig option to specify buildid cache dir 2010-06-05 09:34:04 -03:00
builtin-buildid-list.c perf tools: Remove unneeded code for tracking the cwd in perf sessions 2010-07-27 11:46:12 -03:00
builtin-diff.c perf tools: Remove unneeded code for tracking the cwd in perf sessions 2010-07-27 11:46:12 -03:00
builtin-help.c perf options: Type check all the remaining OPT_ variants 2010-05-17 16:22:41 -03:00
builtin-inject.c perf inject: Add missing bits 2010-05-04 10:48:22 -03:00
builtin-kmem.c perf: add perf-inject builtin 2010-05-02 13:36:56 -03:00
builtin-kvm.c perf options: Type check all the remaining OPT_ variants 2010-05-17 16:22:41 -03:00
builtin-list.c perf list: Fix large list output by using the pager 2009-08-13 09:05:48 +02:00
builtin-lock.c perf options: Type check OPT_BOOLEAN and fix the offenders 2010-05-17 16:22:37 -03:00
builtin-probe.c perf probe: Add basic module support 2010-10-21 16:11:44 -02:00
builtin-record.c perf tools: Release session and symbol resources on exit 2010-07-30 18:31:28 -03:00
builtin-report.c perf: Rename append_callchain into callchain_append 2010-08-22 20:43:51 +02:00
builtin-sched.c perf: Use event__process_task from perf sched 2010-06-01 00:10:32 +02:00
builtin-stat.c perf tools: Add the ability to specify list of cpus to monitor 2010-06-05 09:33:01 -03:00
builtin-test.c perf options: Type check OPT_BOOLEAN and fix the offenders 2010-05-17 16:22:37 -03:00
builtin-timechart.c perf timechart: Adjust confusing if indentation 2010-08-05 19:38:02 -03:00
builtin-top.c perf: expose event__process function 2010-08-04 12:41:23 -03:00
builtin-trace.c perf trace: Fix detection of script extension 2010-10-23 15:31:20 -02:00
builtin.h perf: add perf-inject builtin 2010-05-02 13:36:56 -03:00
command-list.txt perf inject: Add missing bits 2010-05-04 10:48:22 -03:00
CREDITS perf_counter tools: Add CREDITS file for Git contributors 2009-06-24 19:54:29 +02:00
design.txt perf: Fix few typos + cosmetics 2010-01-13 17:39:44 +01:00
feature-tests.mak Merge branch 'linus' into perf/core 2010-08-25 13:10:00 +02:00
Makefile Merge branch 'perf/urgent' into perf/core 2010-10-05 09:47:14 +02:00
MANIFEST perf tools: Make target to generate self contained source tarball 2010-06-05 09:33:35 -03:00
perf-archive.sh perf buildid: add perfconfig option to specify buildid cache dir 2010-06-05 09:34:04 -03:00
perf.c perf buildid: add perfconfig option to specify buildid cache dir 2010-06-05 09:34:04 -03:00
perf.h perf options: Type check OPT_BOOLEAN and fix the offenders 2010-05-17 16:22:37 -03:00