The functionality of printing out absolute timestamps has been implemented in code but not documented in man pages. When comparing the timings of related events with block I/O traces, the absolute timestams play a key role. I think that the documentation of this might be beneficial to blktrace users. The related commit was done in 2006 as follows, > commit 7bd4fd0a4fca645bb50a641afac1e460a4e32dfd > Author: Olaf Kirch <okir@xxxxxx> > Date: Fri Dec 1 10:34:11 2006 +0100 > > [PATCH] Add timestamp support > > Signed-off-by: Jens Axboe <jens.axboe@xxxxxxxxxx> > URL of the above patch, https://git.kernel.org/pub/scm/linux/kernel/git/axboe/blktrace.git/commit/?id=7bd4fd0a4fca645bb50a641afac1e460a4e32dfd Signed-off-by: Hiroaki Mihara <hmihara@xxxxxxxxxx> --- doc/blkparse.1 | 3 +++ 1 file changed, 3 insertions(+) diff --git a/doc/blkparse.1 b/doc/blkparse.1 index 627b7b1..e494b6e 100644 --- a/doc/blkparse.1 +++ b/doc/blkparse.1 @@ -368,6 +368,9 @@ Elapsed value in microseconds (\fI\-t\fR command line option) .IP \fBU\fR 4 Payload unsigned integer +.IP \fBz\fR 4 +The absolute time, as local time in your time zone, with no date displayed + .PP Note that the user can optionally specify field display width, and optionally a left-aligned specifier. These precede field specifiers, with a '%' character, -- 2.21.0
