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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>
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@ -6,6 +6,8 @@
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# Public License ("GPL") version 2 as published by the Free Software
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# Public License ("GPL") version 2 as published by the Free Software
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# Foundation.
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# Foundation.
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import errno, os
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NSECS_PER_SEC = 1000000000
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NSECS_PER_SEC = 1000000000
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def avg(total, n):
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def avg(total, n):
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@ -26,3 +28,38 @@ def nsecs_str(nsecs):
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def clear_term():
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def clear_term():
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print("\x1b[H\x1b[2J")
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print("\x1b[H\x1b[2J")
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audit_package_warned = False
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try:
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import audit
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machine_to_id = {
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'x86_64': audit.MACH_86_64,
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'alpha' : audit.MACH_ALPHA,
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'armeb' : audit.MACH_ARMEB,
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'ia64' : audit.MACH_IA64,
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'ppc' : audit.MACH_PPC,
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'ppc64' : audit.MACH_PPC64,
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's390' : audit.MACH_S390,
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's390x' : audit.MACH_S390X,
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'i386' : audit.MACH_X86,
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'i586' : audit.MACH_X86,
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'i686' : audit.MACH_X86,
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}
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machine_id = machine_to_id[os.uname()[4]]
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except:
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if not audit_package_warned:
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audit_package_warned = True
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print "Install the audit-libs-python package to get syscall names"
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def syscall_name(id):
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try:
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return audit.audit_syscall_to_name(id, machine_id)
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except:
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return str(id)
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def strerror(nr):
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try:
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return errno.errorcode[abs(nr)]
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except:
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return "Unknown %d errno" % nr
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@ -13,21 +13,26 @@ sys.path.append(os.environ['PERF_EXEC_PATH'] + \
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from perf_trace_context import *
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from perf_trace_context import *
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from Core import *
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from Core import *
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from Util import *
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usage = "perf trace -s syscall-counts-by-pid.py [comm]\n";
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usage = "perf trace -s syscall-counts-by-pid.py [comm|pid]\n";
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for_comm = None
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for_comm = None
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for_pid = None
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if len(sys.argv) > 2:
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if len(sys.argv) > 2:
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sys.exit(usage)
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sys.exit(usage)
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if len(sys.argv) > 1:
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if len(sys.argv) > 1:
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for_comm = sys.argv[1]
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try:
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for_pid = int(sys.argv[1])
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except:
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for_comm = sys.argv[1]
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syscalls = autodict()
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syscalls = autodict()
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def trace_begin():
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def trace_begin():
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pass
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print "Press control+C to stop and show the summary"
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def trace_end():
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def trace_end():
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print_error_totals()
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print_error_totals()
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@ -35,9 +40,9 @@ def trace_end():
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def raw_syscalls__sys_exit(event_name, context, common_cpu,
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def raw_syscalls__sys_exit(event_name, context, common_cpu,
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common_secs, common_nsecs, common_pid, common_comm,
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common_secs, common_nsecs, common_pid, common_comm,
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id, ret):
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id, ret):
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if for_comm is not None:
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if (for_comm and common_comm != for_comm) or \
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if common_comm != for_comm:
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(for_pid and common_pid != for_pid ):
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return
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return
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if ret < 0:
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if ret < 0:
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try:
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try:
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@ -62,7 +67,7 @@ def print_error_totals():
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print "\n%s [%d]\n" % (comm, pid),
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print "\n%s [%d]\n" % (comm, pid),
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id_keys = syscalls[comm][pid].keys()
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id_keys = syscalls[comm][pid].keys()
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for id in id_keys:
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for id in id_keys:
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print " syscall: %-16d\n" % (id),
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print " syscall: %-16s\n" % syscall_name(id),
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ret_keys = syscalls[comm][pid][id].keys()
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ret_keys = syscalls[comm][pid][id].keys()
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for ret, val in sorted(syscalls[comm][pid][id].iteritems(), key = lambda(k, v): (v, k), reverse = True):
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for ret, val in sorted(syscalls[comm][pid][id].iteritems(), key = lambda(k, v): (v, k), reverse = True):
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print " err = %-20d %10d\n" % (ret, val),
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print " err = %-20s %10d\n" % (strerror(ret), val),
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