summaryrefslogtreecommitdiff
path: root/tools/perf/scripts/perl/rwtop.pl
diff options
context:
space:
mode:
authorTom Zanussi <tzanussi@gmail.com>2010-05-09 23:46:54 -0500
committerArnaldo Carvalho de Melo <acme@redhat.com>2010-05-10 19:50:56 -0300
commite88a4bfbcda440b1c6b9d5a31a554a6ad9686182 (patch)
treeba73fe7a89847aadf2584e1a537ee257a56ac564 /tools/perf/scripts/perl/rwtop.pl
parent6922c3d772711239e75ddaea760e6b0535e7e7a6 (diff)
downloadlinux-e88a4bfbcda440b1c6b9d5a31a554a6ad9686182.tar.gz
perf/trace/scripting: rwtop script cleanup
A couple of fixes for the rwtop script: - printing the totals and clearing the hashes in the signal handler eventually leads to various random and serious problems when running the rwtop script continuously. Moving the print_totals() calls to the event handlers solves that problem, and the event handlers are invoked frequently enough that it doesn't affect the timeliness of the output. - Fix nuisance 'use of uninitialized value' warnings Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Message-Id: <1273466820-9330-4-git-send-email-tzanussi@gmail.com> Signed-off-by: Tom Zanussi <tzanussi@gmail.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/scripts/perl/rwtop.pl')
-rw-r--r--tools/perf/scripts/perl/rwtop.pl48
1 files changed, 35 insertions, 13 deletions
diff --git a/tools/perf/scripts/perl/rwtop.pl b/tools/perf/scripts/perl/rwtop.pl
index ec2ab49a6f25..4bb3ecd33472 100644
--- a/tools/perf/scripts/perl/rwtop.pl
+++ b/tools/perf/scripts/perl/rwtop.pl
@@ -21,6 +21,7 @@ use Perf::Trace::Util;
my $default_interval = 3;
my $nlines = 20;
my $print_thread;
+my $print_pending = 0;
my %reads;
my %writes;
@@ -36,6 +37,8 @@ sub syscalls::sys_exit_read
$common_pid, $common_comm,
$nr, $ret) = @_;
+ print_check();
+
if ($ret > 0) {
$reads{$common_pid}{bytes_read} += $ret;
} else {
@@ -52,6 +55,8 @@ sub syscalls::sys_enter_read
$common_pid, $common_comm,
$nr, $fd, $buf, $count) = @_;
+ print_check();
+
$reads{$common_pid}{bytes_requested} += $count;
$reads{$common_pid}{total_reads}++;
$reads{$common_pid}{comm} = $common_comm;
@@ -63,6 +68,8 @@ sub syscalls::sys_exit_write
$common_pid, $common_comm,
$nr, $ret) = @_;
+ print_check();
+
if ($ret <= 0) {
$writes{$common_pid}{errors}{$ret}++;
}
@@ -74,6 +81,8 @@ sub syscalls::sys_enter_write
$common_pid, $common_comm,
$nr, $fd, $buf, $count) = @_;
+ print_check();
+
$writes{$common_pid}{bytes_written} += $count;
$writes{$common_pid}{total_writes}++;
$writes{$common_pid}{comm} = $common_comm;
@@ -81,7 +90,7 @@ sub syscalls::sys_enter_write
sub trace_begin
{
- $SIG{ALRM} = \&print_totals;
+ $SIG{ALRM} = \&set_print_pending;
alarm 1;
}
@@ -91,6 +100,20 @@ sub trace_end
print_totals();
}
+sub print_check()
+{
+ if ($print_pending == 1) {
+ $print_pending = 0;
+ print_totals();
+ }
+}
+
+sub set_print_pending()
+{
+ $print_pending = 1;
+ alarm $interval;
+}
+
sub print_totals
{
my $count;
@@ -106,12 +129,12 @@ sub print_totals
printf("%6s %-20s %10s %10s %10s\n", "------", "--------------------",
"----------", "----------", "----------");
- foreach my $pid (sort {$reads{$b}{bytes_read} <=>
- $reads{$a}{bytes_read}} keys %reads) {
- my $comm = $reads{$pid}{comm};
- my $total_reads = $reads{$pid}{total_reads};
- my $bytes_requested = $reads{$pid}{bytes_requested};
- my $bytes_read = $reads{$pid}{bytes_read};
+ foreach my $pid (sort { ($reads{$b}{bytes_read} || 0) <=>
+ ($reads{$a}{bytes_read} || 0) } keys %reads) {
+ my $comm = $reads{$pid}{comm} || "";
+ my $total_reads = $reads{$pid}{total_reads} || 0;
+ my $bytes_requested = $reads{$pid}{bytes_requested} || 0;
+ my $bytes_read = $reads{$pid}{bytes_read} || 0;
printf("%6s %-20s %10s %10s %10s\n", $pid, $comm,
$total_reads, $bytes_requested, $bytes_read);
@@ -130,11 +153,11 @@ sub print_totals
printf("%6s %-20s %10s %13s\n", "------", "--------------------",
"----------", "-------------");
- foreach my $pid (sort {$writes{$b}{bytes_written} <=>
- $writes{$a}{bytes_written}} keys %writes) {
- my $comm = $writes{$pid}{comm};
- my $total_writes = $writes{$pid}{total_writes};
- my $bytes_written = $writes{$pid}{bytes_written};
+ foreach my $pid (sort { ($writes{$b}{bytes_written} || 0) <=>
+ ($writes{$a}{bytes_written} || 0)} keys %writes) {
+ my $comm = $writes{$pid}{comm} || "";
+ my $total_writes = $writes{$pid}{total_writes} || 0;
+ my $bytes_written = $writes{$pid}{bytes_written} || 0;
printf("%6s %-20s %10s %13s\n", $pid, $comm,
$total_writes, $bytes_written);
@@ -146,7 +169,6 @@ sub print_totals
%reads = ();
%writes = ();
- alarm $interval;
}
my %unhandled;