diff options
author | Kevin Wolf <kwolf@redhat.com> | 2016-06-03 13:59:41 +0200 |
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committer | Kevin Wolf <kwolf@redhat.com> | 2016-06-08 10:21:09 +0200 |
commit | 55d539c8f75abab70301a43d8c94b976f6ddc358 (patch) | |
tree | d565d50193f90066146e9dfbcb7bc7fedec80993 /qemu-img.c | |
parent | 83de9be0dc59439ec6f97f58c8e9015b4fdc3010 (diff) | |
download | qemu-55d539c8f75abab70301a43d8c94b976f6ddc358.zip qemu-55d539c8f75abab70301a43d8c94b976f6ddc358.tar.gz qemu-55d539c8f75abab70301a43d8c94b976f6ddc358.tar.bz2 |
qemu-img bench: Add --flush-interval
This options allows to flush the image periodically during write tests.
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.c | 95 |
1 files changed, 86 insertions, 9 deletions
@@ -54,6 +54,8 @@ enum { OPTION_OBJECT = 258, OPTION_IMAGE_OPTS = 259, OPTION_PATTERN = 260, + OPTION_FLUSH_INTERVAL = 261, + OPTION_NO_DRAIN = 262, }; typedef enum OutputFormat { @@ -3468,13 +3470,24 @@ typedef struct BenchData { int step; int nrreq; int n; + int flush_interval; + bool drain_on_flush; uint8_t *buf; QEMUIOVector *qiov; int in_flight; + bool in_flush; uint64_t offset; } BenchData; +static void bench_undrained_flush_cb(void *opaque, int ret) +{ + if (ret < 0) { + error_report("Failed flush request: %s\n", strerror(-ret)); + exit(EXIT_FAILURE); + } +} + static void bench_cb(void *opaque, int ret) { BenchData *b = opaque; @@ -3484,9 +3497,39 @@ static void bench_cb(void *opaque, int ret) error_report("Failed request: %s\n", strerror(-ret)); exit(EXIT_FAILURE); } - if (b->in_flight > 0) { + + if (b->in_flush) { + /* Just finished a flush with drained queue: Start next requests */ + assert(b->in_flight == 0); + b->in_flush = false; + } else if (b->in_flight > 0) { + int remaining = b->n - b->in_flight; + b->n--; b->in_flight--; + + /* Time for flush? Drain queue if requested, then flush */ + if (b->flush_interval && remaining % b->flush_interval == 0) { + if (!b->in_flight || !b->drain_on_flush) { + BlockCompletionFunc *cb; + + if (b->drain_on_flush) { + b->in_flush = true; + cb = bench_cb; + } else { + cb = bench_undrained_flush_cb; + } + + acb = blk_aio_flush(b->blk, cb, b); + if (!acb) { + error_report("Failed to issue flush request"); + exit(EXIT_FAILURE); + } + } + if (b->drain_on_flush) { + return; + } + } } while (b->n > b->in_flight && b->in_flight < b->nrreq) { @@ -3520,6 +3563,8 @@ static int img_bench(int argc, char **argv) size_t bufsize = 4096; int pattern = 0; size_t step = 0; + int flush_interval = 0; + bool drain_on_flush = true; int64_t image_size; BlockBackend *blk = NULL; BenchData data = {}; @@ -3531,8 +3576,10 @@ static int img_bench(int argc, char **argv) for (;;) { static const struct option long_options[] = { {"help", no_argument, 0, 'h'}, + {"flush-interval", required_argument, 0, OPTION_FLUSH_INTERVAL}, {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, {"pattern", required_argument, 0, OPTION_PATTERN}, + {"no-drain", no_argument, 0, OPTION_NO_DRAIN}, {0, 0, 0, 0} }; c = getopt_long(argc, argv, "hc:d:f:no:qs:S:t:w", long_options, NULL); @@ -3640,6 +3687,20 @@ static int img_bench(int argc, char **argv) } break; } + case OPTION_FLUSH_INTERVAL: + { + char *end; + errno = 0; + flush_interval = strtoul(optarg, &end, 0); + if (errno || *end || flush_interval > INT_MAX) { + error_report("Invalid flush interval specified"); + return 1; + } + break; + } + case OPTION_NO_DRAIN: + drain_on_flush = false; + break; case OPTION_IMAGE_OPTS: image_opts = true; break; @@ -3651,6 +3712,17 @@ static int img_bench(int argc, char **argv) } filename = argv[argc - 1]; + if (!is_write && flush_interval) { + error_report("--flush-interval is only available in write tests"); + ret = -1; + goto out; + } + if (flush_interval && flush_interval < depth) { + error_report("Flush interval can't be smaller than depth"); + ret = -1; + goto out; + } + blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet); if (!blk) { ret = -1; @@ -3664,19 +3736,24 @@ static int img_bench(int argc, char **argv) } data = (BenchData) { - .blk = blk, - .image_size = image_size, - .bufsize = bufsize, - .step = step ?: bufsize, - .nrreq = depth, - .n = count, - .offset = offset, - .write = is_write, + .blk = blk, + .image_size = image_size, + .bufsize = bufsize, + .step = step ?: bufsize, + .nrreq = depth, + .n = count, + .offset = offset, + .write = is_write, + .flush_interval = flush_interval, + .drain_on_flush = drain_on_flush, }; printf("Sending %d %s requests, %d bytes each, %d in parallel " "(starting at offset %" PRId64 ", step size %d)\n", data.n, data.write ? "write" : "read", data.bufsize, data.nrreq, data.offset, data.step); + if (flush_interval) { + printf("Sending flush every %d requests\n", flush_interval); + } data.buf = blk_blockalign(blk, data.nrreq * data.bufsize); memset(data.buf, pattern, data.nrreq * data.bufsize); |