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qemu-img: adds option to use aio engine for benchmarking

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Signed-off-by: Aarushi Mehta <mehta.aaru20@gmail.com>
Acked-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 20200120141858.587874-13-stefanha@redhat.com
Message-Id: <20200120141858.587874-13-stefanha@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Aarushi Mehta 2020-01-20 14:18:55 +00:00 committed by Stefan Hajnoczi
parent 1c5a2aecea
commit cdd267749a
3 changed files with 16 additions and 4 deletions
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4
qemu-img-cmds.hx
View File

@ -20,9 +20,9 @@ STEXI
ETEXI
DEF("bench", img_bench,
"bench [-c count] [-d depth] [-f fmt] [--flush-interval=flush_interval] [-n] [--no-drain] [-o offset] [--pattern=pattern] [-q] [-s buffer_size] [-S step_size] [-t cache] [-w] [-U] filename")
"bench [-c count] [-d depth] [-f fmt] [--flush-interval=flush_interval] [-n] [--no-drain] [-o offset] [--pattern=pattern] [-q] [-s buffer_size] [-S step_size] [-t cache] [-i aio] [-w] [-U] filename")
STEXI
@item bench [-c @var{count}] [-d @var{depth}] [-f @var{fmt}] [--flush-interval=@var{flush_interval}] [-n] [--no-drain] [-o @var{offset}] [--pattern=@var{pattern}] [-q] [-s @var{buffer_size}] [-S @var{step_size}] [-t @var{cache}] [-w] [-U] @var{filename}
@item bench [-c @var{count}] [-d @var{depth}] [-f @var{fmt}] [--flush-interval=@var{flush_interval}] [-n] [--no-drain] [-o @var{offset}] [--pattern=@var{pattern}] [-q] [-s @var{buffer_size}] [-S @var{step_size}] [-t @var{cache}] [-i @var{aio}] [-w] [-U] @var{filename}
ETEXI
DEF("check", img_check,

11
qemu-img.c
View File

@ -4187,7 +4187,8 @@ static int img_bench(int argc, char **argv)
{"force-share", no_argument, 0, 'U'},
{0, 0, 0, 0}
};
c = getopt_long(argc, argv, ":hc:d:f:no:qs:S:t:wU", long_options, NULL);
c = getopt_long(argc, argv, ":hc:d:f:ni:o:qs:S:t:wU", long_options,
NULL);
if (c == -1) {
break;
}
@ -4230,6 +4231,14 @@ static int img_bench(int argc, char **argv)
case 'n':
flags |= BDRV_O_NATIVE_AIO;
break;
case 'i':
ret = bdrv_parse_aio(optarg, &flags);
if (ret < 0) {
error_report("Invalid aio option: %s", optarg);
ret = -1;
goto out;
}
break;
case 'o':
{
offset = cvtnum(optarg);

5
qemu-img.texi
View File

@ -206,7 +206,7 @@ Command description:
Amends the image format specific @var{options} for the image file
@var{filename}. Not all file formats support this operation.
@item bench [-c @var{count}] [-d @var{depth}] [-f @var{fmt}] [--flush-interval=@var{flush_interval}] [-n] [--no-drain] [-o @var{offset}] [--pattern=@var{pattern}] [-q] [-s @var{buffer_size}] [-S @var{step_size}] [-t @var{cache}] [-w] [-U] @var{filename}
@item bench [-c @var{count}] [-d @var{depth}] [-f @var{fmt}] [--flush-interval=@var{flush_interval}] [-n] [-i @var{aio}] [--no-drain] [-o @var{offset}] [--pattern=@var{pattern}] [-q] [-s @var{buffer_size}] [-S @var{step_size}] [-t @var{cache}] [-w] [-U] @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.
@ -227,6 +227,9 @@ 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
specified as well.
If @code{-i} is specified, aio option can be used to specify different AIO
backends: @var{threads}, @var{native} or @var{io_uring}.
For write tests, by default a buffer filled with zeros is written. This can be
overridden with a pattern byte specified by @var{pattern}.