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/*
Copyright (c) 2010 Gluster, Inc. <http://www.gluster.com>
This file is part of GlusterFS.
GlusterFS is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
by the Free Software Foundation; either version 3 of the License,
or (at your option) any later version.
GlusterFS is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see
<http://www.gnu.org/licenses/>.
*/
/*
* This file contains functions to support dumping of
* latencies of FOPs broken down by subvolumes.
*/
#include "glusterfs.h"
#include "stack.h"
#include "xlator.h"
#include "common-utils.h"
#include "statedump.h"
void
gf_set_fop_from_fn_pointer (call_frame_t *frame, struct xlator_fops *fops, void *fn)
{
glusterfs_fop_t fop = -1;
if (fops->stat == fn)
fop = GF_FOP_STAT;
else if (fops->readlink == fn)
fop = GF_FOP_READLINK;
else if (fops->mknod == fn)
fop = GF_FOP_MKNOD;
else if (fops->mkdir == fn)
fop = GF_FOP_MKDIR;
else if (fops->unlink == fn)
fop = GF_FOP_UNLINK;
else if (fops->rmdir == fn)
fop = GF_FOP_RMDIR;
else if (fops->symlink == fn)
fop = GF_FOP_SYMLINK;
else if (fops->rename == fn)
fop = GF_FOP_RENAME;
else if (fops->link == fn)
fop = GF_FOP_LINK;
else if (fops->truncate == fn)
fop = GF_FOP_TRUNCATE;
else if (fops->open == fn)
fop = GF_FOP_OPEN;
else if (fops->readv == fn)
fop = GF_FOP_READ;
else if (fops->writev == fn)
fop = GF_FOP_WRITE;
else if (fops->statfs == fn)
fop = GF_FOP_STATFS;
else if (fops->flush == fn)
fop = GF_FOP_FLUSH;
else if (fops->fsync == fn)
fop = GF_FOP_FSYNC;
else if (fops->setxattr == fn)
fop = GF_FOP_SETXATTR;
else if (fops->getxattr == fn)
fop = GF_FOP_GETXATTR;
else if (fops->removexattr == fn)
fop = GF_FOP_REMOVEXATTR;
else if (fops->opendir == fn)
fop = GF_FOP_OPENDIR;
else if (fops->fsyncdir == fn)
fop = GF_FOP_FSYNCDIR;
else if (fops->access == fn)
fop = GF_FOP_ACCESS;
else if (fops->create == fn)
fop = GF_FOP_CREATE;
else if (fops->ftruncate == fn)
fop = GF_FOP_FTRUNCATE;
else if (fops->fstat == fn)
fop = GF_FOP_FSTAT;
else if (fops->lk == fn)
fop = GF_FOP_LK;
else if (fops->lookup == fn)
fop = GF_FOP_LOOKUP;
else if (fops->readdir == fn)
fop = GF_FOP_READDIR;
else if (fops->inodelk == fn)
fop = GF_FOP_INODELK;
else if (fops->finodelk == fn)
fop = GF_FOP_FINODELK;
else if (fops->entrylk == fn)
fop = GF_FOP_ENTRYLK;
else if (fops->fentrylk == fn)
fop = GF_FOP_FENTRYLK;
else if (fops->xattrop == fn)
fop = GF_FOP_XATTROP;
else if (fops->fxattrop == fn)
fop = GF_FOP_FXATTROP;
else if (fops->fgetxattr == fn)
fop = GF_FOP_FGETXATTR;
else if (fops->fsetxattr == fn)
fop = GF_FOP_FSETXATTR;
else if (fops->rchecksum == fn)
fop = GF_FOP_RCHECKSUM;
else if (fops->setattr == fn)
fop = GF_FOP_SETATTR;
else if (fops->fsetattr == fn)
fop = GF_FOP_FSETATTR;
else if (fops->readdirp == fn)
fop = GF_FOP_READDIRP;
else if (fops->getspec == fn)
fop = GF_FOP_GETSPEC;
else
fop = -1;
frame->op = fop;
}
void
gf_update_latency (call_frame_t *frame)
{
double elapsed;
struct timeval *begin, *end;
fop_latency_t *lat;
begin = &frame->begin;
end = &frame->end;
elapsed = (end->tv_sec - begin->tv_sec) * 1e6
+ (end->tv_usec - begin->tv_usec);
lat = &frame->this->latencies[frame->op];
lat->total += elapsed;
lat->count++;
lat->mean = lat->mean + (elapsed - lat->mean) / lat->count;
}
void
gf_proc_dump_latency_info (xlator_t *xl)
{
char key_prefix[GF_DUMP_MAX_BUF_LEN];
char key[GF_DUMP_MAX_BUF_LEN];
int i;
snprintf (key_prefix, GF_DUMP_MAX_BUF_LEN, "%s.latency", xl->name);
gf_proc_dump_add_section (key_prefix);
for (i = 0; i < GF_FOP_MAXVALUE; i++) {
gf_proc_dump_build_key (key, key_prefix, gf_fop_list[i]);
gf_proc_dump_write (key, "%.03f,%"PRId64",%.03f",
xl->latencies[i].mean,
xl->latencies[i].count,
xl->latencies[i].total);
}
}
void
gf_latency_toggle (int signum)
{
glusterfs_ctx_t *ctx = NULL;
ctx = glusterfs_ctx_get ();
if (ctx) {
ctx->measure_latency = !ctx->measure_latency;
gf_log ("[core]", GF_LOG_NORMAL,
"Latency measurement turned %s",
ctx->measure_latency ? "on" : "off");
}
}
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