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-rw-r--r--btt/plat.c102
1 files changed, 102 insertions, 0 deletions
diff --git a/btt/plat.c b/btt/plat.c
new file mode 100644
index 0000000..9b7a2a1
--- /dev/null
+++ b/btt/plat.c
@@ -0,0 +1,102 @@
+/*
+ * blktrace output analysis: generate a timeline & gather statistics
+ *
+ * (C) Copyright 2008 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 plat_info {
+ long nl;
+ FILE *fp;
+ double first_ts, last_ts, tl;
+};
+
+static struct file_info *plat_files = NULL;
+
+void *plat_init(char *str)
+{
+ char *oname;
+ struct plat_info *pp;
+
+ if (plat_freq <= 0.0) return NULL;
+
+ pp = malloc(sizeof(*pp));
+ pp->nl = 0;
+ pp->first_ts = pp->last_ts = pp->tl = -1.0;
+
+ oname = malloc(strlen(str) + 32);
+ sprintf(oname, "%s.dat", str);
+ if ((pp->fp = fopen(oname, "w")) == NULL) {
+ perror(oname);
+ return NULL;
+ }
+ add_file(&plat_files, pp->fp, oname);
+
+ return pp;
+}
+
+void plat_exit(void *info)
+{
+ struct plat_info *pp = info;
+
+ if (pp == NULL) return;
+
+ if (pp->first_ts != -1.0) {
+ double delta = pp->last_ts - pp->first_ts;
+
+ fprintf(pp->fp, "%lf %lf\n",
+ pp->first_ts + (delta / 2), pp->tl / pp->nl);
+ }
+ free(info);
+}
+
+void plat_clean(void)
+{
+ clean_files(&plat_files);
+}
+
+void plat_x2c(void *info, __u64 ts, __u64 latency)
+{
+ double now = TO_SEC(ts);
+ double lat = TO_SEC(latency);
+ struct plat_info *pp = info;
+
+ if (pp == NULL) return;
+
+ if (pp->first_ts == -1.0) {
+ pp->first_ts = pp->last_ts = now;
+ pp->nl = 1;
+ pp->tl = lat;
+ }
+ else if ((now - pp->first_ts) >= plat_freq) {
+ double delta = pp->last_ts - pp->first_ts;
+
+ fprintf(pp->fp, "%lf %lf\n",
+ pp->first_ts + (delta / 2), pp->tl / pp->nl);
+
+ pp->first_ts = pp->last_ts = now;
+ pp->nl = 1;
+ pp->tl = lat;
+ }
+ else {
+ pp->last_ts = now;
+ pp->nl += 1;
+ pp->tl += lat;
+ }
+}