Commit 6c051ce0 authored Mar 25, 2009 by Li Zefan Committed by Ingo Molnar Mar 31, 2009

blktrace: fix timestamp in binary output



I found the timestamp is wrong:

 # echo bin > trace_option
 # echo blk > current_tracer
 # cat trace_pipe | blkparse -i -
 8,0    0        0     0.000000000   504  A   W ...
 ...
 8,7    1        0     0.008534097     0  C   R ...
            (should be 8.534097xxx)

user-space blkparse expects the timestamp to be nanosecond.

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Acked-by: Jens Axboe <jens.axboe@oracle.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

parent 09341997

kernel/trace/blktrace.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -1168,7 +1168,7 @@ static int blk_trace_synthesize_old_trace(struct trace_iterator *iter)
		const int offset = offsetof(struct blk_io_trace, sector);
		struct blk_io_trace old = {
		.magic = BLK_IO_TRACE_MAGIC \| BLK_IO_TRACE_VERSION,
		.time = ns2usecs(iter->ts),
		.time = iter->ts,
		};

		if (!trace_seq_putmem(s, &old, offset))