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perf python scripting: Improve the failed-syscalls-by-pid script

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. 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>
This commit is contained in:
Arnaldo Carvalho de Melo 2010-10-25 15:15:10 -02:00
parent 66a301c380
commit 6cc7361440
2 changed files with 50 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

37
tools/perf/scripts/python/Perf-Trace-Util/lib/Perf/Trace/Util.py
View File

@ -6,6 +6,8 @@
# Public License ("GPL") version 2 as published by the Free Software
# Foundation.
import errno, os
NSECS_PER_SEC = 1000000000
def avg(total, n):
@ -26,3 +28,38 @@ def nsecs_str(nsecs):
def clear_term():
print("\x1b[H\x1b[2J")
audit_package_warned = False
try:
import audit
machine_to_id = {
'x86_64': audit.MACH_86_64,
'alpha' : audit.MACH_ALPHA,
'armeb' : audit.MACH_ARMEB,
'ia64' : audit.MACH_IA64,
'ppc' : audit.MACH_PPC,
'ppc64' : audit.MACH_PPC64,
's390' : audit.MACH_S390,
's390x' : audit.MACH_S390X,
'i386' : audit.MACH_X86,
'i586' : audit.MACH_X86,
'i686' : audit.MACH_X86,
}
machine_id = machine_to_id[os.uname()[4]]
except:
if not audit_package_warned:
audit_package_warned = True
print "Install the audit-libs-python package to get syscall names"
def syscall_name(id):
try:
return audit.audit_syscall_to_name(id, machine_id)
except:
return str(id)
def strerror(nr):
try:
return errno.errorcode[abs(nr)]
except:
return "Unknown %d errno" % nr

21
tools/perf/scripts/python/failed-syscalls-by-pid.py
View File

@ -13,21 +13,26 @@ sys.path.append(os.environ['PERF_EXEC_PATH'] + \
from perf_trace_context import *
from Core import *
from Util import *
usage = "perf trace -s syscall-counts-by-pid.py [comm]\n";
usage = "perf trace -s syscall-counts-by-pid.py [comm|pid]\n";
for_comm = None
for_pid = None
if len(sys.argv) > 2:
sys.exit(usage)
if len(sys.argv) > 1:
for_comm = sys.argv[1]
try:
for_pid = int(sys.argv[1])
except:
for_comm = sys.argv[1]
syscalls = autodict()
def trace_begin():
pass
print "Press control+C to stop and show the summary"
def trace_end():
print_error_totals()
@ -35,9 +40,9 @@ def trace_end():
def raw_syscalls__sys_exit(event_name, context, common_cpu,
common_secs, common_nsecs, common_pid, common_comm,
id, ret):
if for_comm is not None:
if common_comm != for_comm:
return
if (for_comm and common_comm != for_comm) or \
(for_pid and common_pid != for_pid ):
return
if ret < 0:
try:
@ -62,7 +67,7 @@ def print_error_totals():
print "\n%s [%d]\n" % (comm, pid),
id_keys = syscalls[comm][pid].keys()
for id in id_keys:
print " syscall: %-16d\n" % (id),
print " syscall: %-16s\n" % syscall_name(id),
ret_keys = syscalls[comm][pid][id].keys()
for ret, val in sorted(syscalls[comm][pid][id].iteritems(), key = lambda(k, v): (v, k), reverse = True):
print " err = %-20d %10d\n" % (ret, val),
print " err = %-20s %10d\n" % (strerror(ret), val),