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nvme/perf: align buffers to block size for libaio

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This is required by libaio.  Previously, buffers were aligned to 512
bytes, but 4K devices need 4K-aligned buffers.

Change-Id: I96080e72dc77e0e72f426f7c9fe98b6724f66e1b
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
This commit is contained in:
Daniel Verkamp 2017-04-06 09:59:32 -07:00 committed by Ben Walker
parent 8e97d585de
commit 4f9f191c89
1 changed files with 10 additions and 1 deletions
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11
examples/nvme/perf/perf.c
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@ -141,6 +141,7 @@ static int g_num_workers = 0;
static uint64_t g_tsc_rate;
static uint32_t g_io_align = 0x200;
static uint32_t g_io_size_bytes;
static int g_rw_percentage;
static int g_is_random;
@ -336,6 +337,14 @@ register_aio_file(const char *path)
return -1;
}
/*
* TODO: This should really calculate the LCM of the current g_io_align and blklen.
* For now, it's fairly safe to just assume all block sizes are powers of 2.
*/
if (g_io_align < blklen) {
g_io_align = blklen;
}
entry = malloc(sizeof(struct ns_entry));
if (entry == NULL) {
close(fd);
@ -401,7 +410,7 @@ aio_check_io(struct ns_worker_ctx *ns_ctx)
static void task_ctor(struct rte_mempool *mp, void *arg, void *__task, unsigned id)
{
struct perf_task *task = __task;
task->buf = spdk_zmalloc(g_io_size_bytes, 0x200, NULL);
task->buf = spdk_zmalloc(g_io_size_bytes, g_io_align, NULL);
if (task->buf == NULL) {
fprintf(stderr, "task->buf spdk_zmalloc failed\n");
exit(1);