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| author | Kevin Wolf <kwolf@redhat.com> | 2015-07-10 18:09:18 +0200 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2016-06-08 10:21:09 +0200 |
| commit | d3199a31c7bc72f6bcecbb3ebcc16940a1721e10 (patch) | |
| tree | ea8bc6df0b3b2f00e8dd871b02d11fa37b6d6f80 /qemu-img.texi | |
| parent | b6495fa8493bb56e51506e39a5e575a4404c1cec (diff) | |
qemu-img bench: Make start offset configurable
This patch adds an option the specify the offset of the first request
made by qemu-img bench. This allows to benchmark misaligned requests.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Denis V. Lunev <den@openvz.org>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'qemu-img.texi')
| -rw-r--r-- | qemu-img.texi | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/qemu-img.texi b/qemu-img.texi index c477fbf1c3..9bffad226b 100644 --- a/qemu-img.texi +++ b/qemu-img.texi @@ -131,13 +131,14 @@ Skip the creation of the target volume Command description: @table @option -@item bench [-c @var{count}] [-d @var{depth}] [-f @var{fmt}] [-n] [--pattern=@var{pattern}] [-q] [-s @var{buffer_size}] [-t @var{cache}] [-w] @var{filename} +@item bench [-c @var{count}] [-d @var{depth}] [-f @var{fmt}] [-n] [-o @var{offset}] [--pattern=@var{pattern}] [-q] [-s @var{buffer_size}] [-t @var{cache}] [-w] @var{filename} Run a simple sequential I/O benchmark on the specified image. If @code{-w} is specified, a write test is performed, otherwise a read test is performed. A total number of @var{count} I/O requests is performed, each @var{buffer_size} -bytes in size, and with @var{depth} requests in parallel. +bytes in size, and with @var{depth} requests in parallel. The first request +starts at the position given by @var{offset}. If @code{-n} is specified, the native AIO backend is used if possible. On Linux, this option only works if @code{-t none} or @code{-t directsync} is |