67439d555f
Since common_callchain has been added to the argument array, we need to
reflect it in perl-based scripts, because otherwise the following args
would be shifted and thus incorrect. E.g. rw-by-pid and calculation of
read and written bytes:
Before:
read counts by pid:
pid comm # reads bytes_requested bytes_read
------ -------------------- ----------- ---------- ----------
19301 dd 4 424510450039736 0
After:
read counts by pid:
pid comm # reads bytes_requested bytes_read
------ -------------------- ----------- ---------- ----------
19301 dd 4 9536 4341
Committer testing:
To see before after first do:
# perf script record rw-by-pid
^C
Now you'll have a perf.data file to report on, then do before and after
using:
# perf script report rw-by-pid
Anbd notice the bytes_request/bytes_read, as above.
Signed-off-by: Michael Petlan <mpetlan@redhat.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Benjamin Salon <bsalon@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
LPU-Reference: 20200311132836.12693-1-mpetlan@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
48 lines
1.1 KiB
Raku
48 lines
1.1 KiB
Raku
# failed system call counts
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# (c) 2010, Tom Zanussi <tzanussi@gmail.com>
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# Licensed under the terms of the GNU GPL License version 2
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#
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# Displays system-wide failed system call totals
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# If a [comm] arg is specified, only syscalls called by [comm] are displayed.
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use lib "$ENV{'PERF_EXEC_PATH'}/scripts/perl/Perf-Trace-Util/lib";
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use lib "./Perf-Trace-Util/lib";
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use Perf::Trace::Core;
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use Perf::Trace::Context;
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use Perf::Trace::Util;
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my $for_comm = shift;
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my %failed_syscalls;
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sub raw_syscalls::sys_exit
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{
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my ($event_name, $context, $common_cpu, $common_secs, $common_nsecs,
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$common_pid, $common_comm, $common_callchain,
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$id, $ret) = @_;
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if ($ret < 0) {
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$failed_syscalls{$common_comm}++;
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}
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}
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sub syscalls::sys_exit
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{
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raw_syscalls::sys_exit(@_)
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}
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sub trace_end
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{
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printf("\nfailed syscalls by comm:\n\n");
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printf("%-20s %10s\n", "comm", "# errors");
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printf("%-20s %6s %10s\n", "--------------------", "----------");
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foreach my $comm (sort {$failed_syscalls{$b} <=> $failed_syscalls{$a}}
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keys %failed_syscalls) {
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next if ($for_comm && $comm ne $for_comm);
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printf("%-20s %10s\n", $comm, $failed_syscalls{$comm});
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}
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}
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