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From: Jan Kara <jack@suse.cz>
To: Jens Axboe <axboe@kernel.dk>
Cc: <linux-block@vger.kernel.org>, Jan Kara <jack@suse.cz>
Subject: [PATCH] blkparse: Print time when trace was started
Date: Wed, 13 Jan 2021 12:26:43 +0100	[thread overview]
Message-ID: <20210113112643.12893-1-jack@suse.cz> (raw)

For correlating blktrace data with other information, it is useful to
know when the trace has been captured. Since the absolute timestamp
is contained in the blktrace file, just output it.

Signed-off-by: Jan Kara <jack@suse.cz>
---
 blkparse.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/blkparse.c b/blkparse.c
index 911309e26a15..dc518632ebf5 100644
--- a/blkparse.c
+++ b/blkparse.c
@@ -31,6 +31,7 @@
 #include <signal.h>
 #include <locale.h>
 #include <libgen.h>
+#include <time.h>
 
 #include "blktrace.h"
 #include "rbtree.h"
@@ -2797,6 +2798,7 @@ static void show_stats(void)
 
 	if (per_device_and_cpu_stats)
 		show_device_and_cpu_stats();
+	fprintf(ofp, "Trace started at %s\n", ctime(&abs_start_time.tv_sec));
 
 	fflush(ofp);
 }
-- 
2.26.2


             reply	other threads:[~2021-01-13 11:27 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-13 11:26 Jan Kara [this message]
2021-01-14  0:41 ` [PATCH] blkparse: Print time when trace was started Chaitanya Kulkarni
2021-04-19  8:06 ` Jan Kara
2021-04-19 17:55 ` Jens Axboe

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