diff options
| -rw-r--r-- | qemu-img-cmds.hx | 4 | ||||
| -rw-r--r-- | qemu-img.c | 38 | ||||
| -rw-r--r-- | qemu-img.texi | 13 |
3 files changed, 44 insertions, 11 deletions
diff --git a/qemu-img-cmds.hx b/qemu-img-cmds.hx index f3bd546335..baca85ee12 100644 --- a/qemu-img-cmds.hx +++ b/qemu-img-cmds.hx @@ -10,9 +10,9 @@ STEXI ETEXI DEF("bench", img_bench, - "bench [-c count] [-d depth] [-f fmt] [-n] [-q] [-s buffer_size] [-t cache] filename") + "bench [-c count] [-d depth] [-f fmt] [-n] [--pattern=pattern] [-q] [-s buffer_size] [-t cache] [-w] filename") STEXI -@item bench [-c @var{count}] [-d @var{depth}] [-f @var{fmt}] [-n] [-q] [-s @var{buffer_size}] [-t @var{cache}] @var{filename} +@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} ETEXI DEF("check", img_check, 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); diff --git a/qemu-img.texi b/qemu-img.texi index b6b28e3542..c477fbf1c3 100644 --- a/qemu-img.texi +++ b/qemu-img.texi @@ -131,16 +131,21 @@ Skip the creation of the target volume Command description: @table @option -@item bench [-c @var{count}] [-d @var{depth}] [-f @var{fmt}] [-n] [-q] [-s @var{buffer_size}] [-t @var{cache}] @var{filename} +@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} -Run a simple sequential read benchmark on the specified image. 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. +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. 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. +For write tests, by default a buffer filled with zeros is written. This can be +overridden with a pattern byte specified by @var{pattern}. + @item check [-f @var{fmt}] [--output=@var{ofmt}] [-r [leaks | all]] [-T @var{src_cache}] @var{filename} Perform a consistency check on the disk image @var{filename}. The command can |