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examples/nvme/perf: pick num_requests based on qpairs per ns

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If we want to test something like 512 qpairs, with qd = 8 for
each, you need to specify -q 4096 -P 512.  Then those 4096
I/O are spread across the 512 qpairs, to get qd = 8
for each qpair..

But currently it ends up also allocating 4096 num_io_requests
for each qpair which is a huge waste.  We need to instead
base the num_io_requests on the effective queue depth for
each of the qpairs.

Signed-off-by: Jim Harris <james.r.harris@intel.com>
Change-Id: I3ec0f4d9ab94388bf980c0b0439790847161ec12
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/17620
Reviewed-by: Konrad Sztyber <konrad.sztyber@intel.com>
Reviewed-by: Aleksey Marchuk <alexeymar@nvidia.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Shuhei Matsumoto <smatsumoto@nvidia.com>
This commit is contained in:
Jim Harris 2023-04-18 00:05:57 +00:00 committed by David Ko
parent 168f31f5b0
commit a8d86cb313
1 changed files with 1 additions and 1 deletions
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2
examples/nvme/perf/perf.c
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@ -1265,7 +1265,7 @@ register_ns(struct spdk_nvme_ctrlr *ctrlr, struct spdk_nvme_ns *ns)
entry->fn_table = &nvme_fn_table;
entry->u.nvme.ctrlr = ctrlr;
entry->u.nvme.ns = ns;
entry->num_io_requests = g_queue_depth * entries;
entry->num_io_requests = entries * spdk_divide_round_up(g_queue_depth, g_nr_io_queues_per_ns);
entry->size_in_ios = ns_size / g_io_size_bytes;
entry->io_size_blocks = g_io_size_bytes / sector_size;