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authorHiroaki Mihara <hmihara@redhat.com>2019-09-20 14:03:36 +0900
committerJens Axboe <axboe@kernel.dk>2019-09-24 15:28:51 -0600
commit09feee843ec1f5e00db56da5f4ff91847c3cd958 (patch)
tree87b4b2ff3181a7f881dacbb264f016c5fbc45923
parent667ac92a1a72b6038f0fae4acfc6a280fd69697b (diff)
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blktrace-09feee843ec1f5e00db56da5f4ff91847c3cd958.tar.bz2
blkparse: man: add absolute timestamp printing option
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@lst.de> > Date: Fri Dec 1 10:34:11 2006 +0100 > > [PATCH] Add timestamp support > > Signed-off-by: Jens Axboe <jens.axboe@oracle.com> > URL of the above patch, https://git.kernel.org/pub/scm/linux/kernel/git/axboe/blktrace.git/commit/?id=7bd4fd0a4fca645bb50a641afac1e460a4e32dfd Acked-by: Jeff Moyer <jmoyer@redhat.com> Signed-off-by: Hiroaki Mihara <hmihara@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
-rw-r--r--doc/blkparse.13
1 files changed, 3 insertions, 0 deletions
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,