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-rw-r--r--libglusterfs/src/latency.c191
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diff --git a/libglusterfs/src/latency.c b/libglusterfs/src/latency.c
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+/*
+ Copyright (c) 2009 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,
+ struct xlator_mops *mops, 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->checksum == fn)
+ fop = GF_FOP_CHECKSUM;
+ 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 (mops->getspec == fn)
+ fop = GF_MOP_GETSPEC;
+ else if (mops->log == fn)
+ fop = GF_MOP_LOG;
+ 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 = get_global_ctx_ptr ();
+
+ if (ctx) {
+ ctx->measure_latency = !ctx->measure_latency;
+ gf_log ("[core]", GF_LOG_NORMAL,
+ "Latency measurement turned %s",
+ ctx->measure_latency ? "on" : "off");
+ }
+}