1 files changed, 93 insertions, 0 deletions
diff --git a/btt/plat.c b/btt/plat.c
new file mode 100644
index 0000000..7a9bb2a
--- /dev/null
+++ b/btt/plat.c
@@ -0,0 +1,93 @@
+/*
+ * 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;
+};
+
+void *plat_alloc(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 = my_fopen(oname, "w")) == NULL) {
+		perror(oname);
+		return NULL;
+	}
+	add_file(pp->fp, oname);
+
+	return pp;
+}
+
+void plat_free(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_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;
+	}
+}