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/*
* This file and its contents are supplied under the terms of the
* Common Development and Distribution License ("CDDL"), version 1.0.
* You may only use this file in accordance with the terms of version
* 1.0 of the CDDL.
*
* A full copy of the text of the CDDL should have accompanied this
* source. A copy of the CDDL is also available via the Internet at
* http://www.illumos.org/license/CDDL.
*/
/*
* Copyright (c) 2016, 2018 by Delphix. All rights reserved.
*/
/*
* This measures metrics that relate to the performance of the ZIL.
*
* The "zil_commit" and "zil_commit_writer" fuctions are instrumented.
* For each function, the number of times each function is called is
* tracked, as well as the average latency for function, and a histogram
* of the latencies for each function.
*/
#pragma D option aggsortkey
#pragma D option quiet
BEGIN
{
@c["zil_commit"] = count();
@a["zil_commit"] = avg(0);
@h["zil_commit"] = quantize(0);
@c["zil_commit_writer"] = count();
@a["zil_commit_writer"] = avg(0);
@h["zil_commit_writer"] = quantize(0);
clear(@c);
clear(@a);
clear(@h);
}
fbt:zfs:zil_commit:entry
/ args[0]->zl_spa->spa_name == $$1 /
{
self->zc_elapsed = timestamp;
}
fbt:zfs:zil_commit:return
/ self->zc_elapsed /
{
@c[probefunc] = count();
@a[probefunc] = avg(timestamp - self->zc_elapsed);
@h[probefunc] = quantize(timestamp - self->zc_elapsed);
self->zc_elapsed = 0;
}
fbt:zfs:zil_commit_writer:entry
/ self->zc_elapsed && args[0]->zl_spa->spa_name == $$1 /
{
self->zcw_elapsed = timestamp;
}
fbt:zfs:zil_commit_writer:return
/ self->zcw_elapsed /
{
@c[probefunc] = count();
@a[probefunc] = avg(timestamp - self->zcw_elapsed);
@h[probefunc] = quantize(timestamp - self->zcw_elapsed);
self->zcw_elapsed = 0;
}
tick-$2s
{
printf("%u\n", `time);
printa("counts_%-21s %@u\n", @c);
printa("avgs_%-21s %@u\n", @a);
printa("histograms_%-21s %@u\n", @h);
clear(@c);
clear(@a);
clear(@h);
}
ERROR
{
trace(arg1);
trace(arg2);
trace(arg3);
trace(arg4);
trace(arg5);
}
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