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stackcollapse-perf.pl: Add an option to aggregate comm across cpus. #334

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stackcollapse-perf.pl: Add an option to aggregate comm across cpus. #334

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7b826c0
stackcollapse-perf.pl: Add an option to aggregate comm across cpus.
Apr 16, 2024
e577966
stackcollapse-perf.pl: Add an option to aggregate comm across cpus.
Apr 16, 2024
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13 changes: 11 additions & 2 deletions stackcollapse-perf.pl
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Original file line number Diff line number Diff line change
Expand Up @@ -88,6 +88,7 @@ sub remember_stack {

my $show_inline = 0;
my $show_context = 0;
my $aggregate_comm = 0; # replace '/<suffix>' in input process names with '/all'

my $srcline_in_input = 0; # if there are extra lines with source location (perf script -F+srcline)
GetOptions('inline' => \$show_inline,
Expand All @@ -99,7 +100,8 @@ sub remember_stack {
'all' => \$annotate_all,
'tid' => \$include_tid,
'addrs' => \$include_addrs,
'event-filter=s' => \$event_filter)
'event-filter=s' => \$event_filter,
'aggregate-comm' => \$aggregate_comm)
or die <<USAGE_END;
USAGE: $0 [options] infile > outfile\n
--pid # include PID with process names [1]
Expand All @@ -111,7 +113,8 @@ sub remember_stack {
--context # adds source context to --inline
--srcline # parses output of 'perf script -F+srcline' and adds source context
--addrs # include raw addresses where symbols can't be found
--event-filter=EVENT # event name filter\n
--event-filter=EVENT # event name filter
--aggregate-comm # replace '/<suffix>' in input process names with '/all'\n
[1] perf script must emit both PID and TIDs for these to work; eg, Linux < 4.1:
perf script -f comm,pid,tid,cpu,time,event,ip,sym,dso,trace
for Linux >= 4.1:
Expand Down Expand Up @@ -256,6 +259,12 @@ sub inline {
$tid = $pid;
$pid = "?";
}
if ($aggregate_comm) {
# Replace per-cpu suffix in process names with '/all'.
# This allows aggregation across multiple CPUs.
# ksoftirqd/156 -> ksoftirqd/all
$comm =~ s/\/.+/\/all/g;
}

if (/:\s*(\d+)*\s+(\S+):\s*$/) {
$period = $1;
Expand Down