summaryrefslogtreecommitdiff
path: root/btt/rstats.c
diff options
context:
space:
mode:
Diffstat (limited to 'btt/rstats.c')
-rw-r--r--btt/rstats.c136
1 files changed, 136 insertions, 0 deletions
diff --git a/btt/rstats.c b/btt/rstats.c
new file mode 100644
index 0000000..c0d2904
--- /dev/null
+++ b/btt/rstats.c
@@ -0,0 +1,136 @@
+/*
+ * blktrace output analysis: generate a timeline & gather statistics
+ *
+ * (C) Copyright 2009 Hewlett-Packard Development Company, L.P.
+ * Alan D. Brunelle (alan.brunelle@hp.com)
+ *
+ * This program 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+#include "globals.h"
+
+struct files {
+ FILE *fp;
+ char *nm;
+};
+
+struct rstat {
+ struct list_head head;
+ struct files files[2];
+ unsigned long long ios, nblks;
+ long long base_sec;
+};
+
+static struct rstat *sys_info;
+static LIST_HEAD(rstats);
+
+static int do_open(struct files *fip, char *bn, char *pn)
+{
+ fip->nm = malloc(sizeof(bn) + 16);
+ sprintf(fip->nm, "%s_%s.dat", bn, pn);
+
+ fip->fp = my_fopen(fip->nm, "w");
+ if (fip->fp) {
+ add_file(fip->fp, fip->nm);
+ return 0;
+ }
+
+ free(fip->nm);
+ return -1;
+}
+
+static int init_rsip(struct rstat *rsip, char *bn)
+{
+ rsip->ios = rsip->nblks = 0;
+ if (do_open(&rsip->files[0], bn, "iops_fp") ||
+ do_open(&rsip->files[1], bn, "mbps_fp"))
+ return -1;
+
+ list_add_tail(&rsip->head, &rstats);
+ return 0;
+}
+
+static void rstat_emit(struct rstat *rsip, double cur)
+{
+ double mbps;
+
+ /*
+ * I/Os per second is easy: just the ios
+ */
+ fprintf(rsip->files[0].fp, "%lld %llu\n", rsip->base_sec, rsip->ios);
+
+ /*
+ * MB/s we convert blocks to mb...
+ */
+ mbps = ((double)rsip->nblks * 512.0) / (1024.0 * 1024.0);
+ fprintf(rsip->files[1].fp, "%lld %lf\n", rsip->base_sec, mbps);
+
+ rsip->base_sec = (unsigned long long)cur;
+ rsip->ios = rsip->nblks = 0;
+}
+
+static void __add(struct rstat *rsip, double cur, unsigned long long nblks)
+{
+ if (rsip->base_sec < 0)
+ rsip->base_sec = (long long)cur;
+ else if (((long long)cur - rsip->base_sec) >= 1)
+ rstat_emit(rsip, cur);
+
+ rsip->ios++;
+ rsip->nblks += nblks;
+}
+
+void *rstat_alloc(char *bn)
+{
+ struct rstat *rsip = malloc(sizeof(*rsip));
+
+ if (!init_rsip(rsip, bn))
+ return rsip;
+
+ free(rsip);
+ return NULL;
+}
+
+void rstat_free(void *ptr)
+{
+ struct rstat *rsip = ptr;
+
+ rstat_emit(rsip, last_t_seen);
+ list_del(&rsip->head);
+ free(rsip);
+}
+
+void rstat_add(void *ptr, double cur, unsigned long long nblks)
+{
+ if (ptr != NULL)
+ __add((struct rstat *)ptr, cur, nblks);
+ __add(sys_info, cur, nblks);
+}
+
+int rstat_init(void)
+{
+ sys_info = rstat_alloc("sys");
+ return sys_info != NULL;
+}
+
+void rstat_exit(void)
+{
+ struct list_head *p, *q;
+
+ list_for_each_safe(p, q, &rstats) {
+ struct rstat *rsip = list_entry(p, struct rstat, head);
+ rstat_free(rsip);
+ }
+}