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/*
Copyright (c) 2008-2012 Red Hat, Inc. <http://www.redhat.com>
This file is part of GlusterFS.
This file is licensed to you under your choice of the GNU Lesser
General Public License, version 3 or any later version (LGPLv3 or
later), or the GNU General Public License, version 2 (GPLv2), in all
cases as published by the Free Software Foundation.
*/
/*
* This file contains functions to support dumping of
* latencies of FOPs broken down by subvolumes.
*/
#include "glusterfs/glusterfs.h"
#include "glusterfs/statedump.h"
gf_latency_t *
gf_latency_new(size_t n)
{
int i = 0;
gf_latency_t *lat = NULL;
lat = GF_MALLOC(n * sizeof(*lat), gf_common_mt_latency_t);
if (!lat)
return NULL;
for (i = 0; i < n; i++) {
gf_latency_reset(lat + i);
}
return lat;
}
void
gf_latency_update(gf_latency_t *lat, struct timespec *begin,
struct timespec *end)
{
if (!(begin->tv_sec && end->tv_sec)) {
/*Measure latency might have been enabled/disabled during the op*/
return;
}
double elapsed = gf_tsdiff(begin, end);
if (lat->max < elapsed)
lat->max = elapsed;
if (lat->min > elapsed)
lat->min = elapsed;
lat->total += elapsed;
lat->count++;
}
void
gf_latency_reset(gf_latency_t *lat)
{
if (!lat)
return;
memset(lat, 0, sizeof(*lat));
lat->min = ULLONG_MAX;
/* make sure 'min' is set to high value, so it would be
properly set later */
}
void
gf_frame_latency_update(call_frame_t *frame)
{
gf_latency_t *lat;
/* Can happen mostly at initiator xlator, as STACK_WIND/UNWIND macros
set it right anyways for those frames */
if (!frame->op)
frame->op = frame->root->op;
if (frame->op < 0 || frame->op >= GF_FOP_MAXVALUE) {
gf_log("[core]", GF_LOG_WARNING, "Invalid frame op value: %d",
frame->op);
return;
}
lat = &frame->this->stats.interval.latencies[frame->op];
gf_latency_update(lat, &frame->begin, &frame->end);
}
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