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authorKevin Wolf <kwolf@redhat.com>2015-07-10 18:09:18 +0200
committerKevin Wolf <kwolf@redhat.com>2016-06-08 10:21:09 +0200
commitb6495fa8493bb56e51506e39a5e575a4404c1cec (patch)
tree24bfcfcfc95b354922246369da2a3ee97e02a43c /qemu-img.c
parentb6133b8c68c75cdb6b74d23257cd330bb66f595b (diff)
downloadqemu-arm-b6495fa8493bb56e51506e39a5e575a4404c1cec.tar.gz
qemu-img bench: Sequential writes
This extends qemu-img bench with an option that makes it use sequential writes instead of reads for the test run. 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.c')
-rw-r--r--qemu-img.c38
1 files changed, 33 insertions, 5 deletions
diff --git a/qemu-img.c b/qemu-img.c
index d471d10020..85d13532e8 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -53,6 +53,7 @@ enum {
OPTION_BACKING_CHAIN = 257,
OPTION_OBJECT = 258,
OPTION_IMAGE_OPTS = 259,
+ OPTION_PATTERN = 260,
};
typedef enum OutputFormat {
@@ -3462,6 +3463,7 @@ out_no_progress:
typedef struct BenchData {
BlockBackend *blk;
uint64_t image_size;
+ bool write;
int bufsize;
int nrreq;
int n;
@@ -3487,8 +3489,13 @@ static void bench_cb(void *opaque, int ret)
}
while (b->n > b->in_flight && b->in_flight < b->nrreq) {
- acb = blk_aio_preadv(b->blk, b->offset, b->qiov, 0,
- bench_cb, b);
+ if (b->write) {
+ acb = blk_aio_pwritev(b->blk, b->offset, b->qiov, 0,
+ bench_cb, b);
+ } else {
+ acb = blk_aio_preadv(b->blk, b->offset, b->qiov, 0,
+ bench_cb, b);
+ }
if (!acb) {
error_report("Failed to issue request");
exit(EXIT_FAILURE);
@@ -3505,9 +3512,11 @@ static int img_bench(int argc, char **argv)
const char *fmt = NULL, *filename;
bool quiet = false;
bool image_opts = false;
+ bool is_write = false;
int count = 75000;
int depth = 64;
size_t bufsize = 4096;
+ int pattern = 0;
int64_t image_size;
BlockBackend *blk = NULL;
BenchData data = {};
@@ -3520,9 +3529,10 @@ static int img_bench(int argc, char **argv)
static const struct option long_options[] = {
{"help", no_argument, 0, 'h'},
{"image-opts", no_argument, 0, OPTION_IMAGE_OPTS},
+ {"pattern", required_argument, 0, OPTION_PATTERN},
{0, 0, 0, 0}
};
- c = getopt_long(argc, argv, "hc:d:f:nqs:t:", long_options, NULL);
+ c = getopt_long(argc, argv, "hc:d:f:nqs:t:w", long_options, NULL);
if (c == -1) {
break;
}
@@ -3585,6 +3595,21 @@ static int img_bench(int argc, char **argv)
goto out;
}
break;
+ case 'w':
+ flags |= BDRV_O_RDWR;
+ is_write = true;
+ break;
+ case OPTION_PATTERN:
+ {
+ char *end;
+ errno = 0;
+ pattern = strtoul(optarg, &end, 0);
+ if (errno || *end || pattern > 0xff) {
+ error_report("Invalid pattern byte specified");
+ return 1;
+ }
+ break;
+ }
case OPTION_IMAGE_OPTS:
image_opts = true;
break;
@@ -3614,11 +3639,14 @@ static int img_bench(int argc, char **argv)
.bufsize = bufsize,
.nrreq = depth,
.n = count,
+ .write = is_write,
};
- printf("Sending %d requests, %d bytes each, %d in parallel\n",
- data.n, data.bufsize, data.nrreq);
+ printf("Sending %d %s requests, %d bytes each, %d in parallel\n",
+ data.n, data.write ? "write" : "read", data.bufsize, data.nrreq);
data.buf = blk_blockalign(blk, data.nrreq * data.bufsize);
+ memset(data.buf, pattern, data.nrreq * data.bufsize);
+
data.qiov = g_new(QEMUIOVector, data.nrreq);
for (i = 0; i < data.nrreq; i++) {
qemu_iovec_init(&data.qiov[i], 1);