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Subject[PATCH 1/3] 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>
---
kernel/trace/blktrace.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c
index 6fb274f..ee7a8bb 100644
--- a/kernel/trace/blktrace.c
+++ b/kernel/trace/blktrace.c
@@ -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))
--
1.5.4.rc3



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