Previous version just used batching for initial queue depth loading
as an example of how to batch. This version adds a new param -b that
allows the caller to either disable or set a specific batch value
for use during the entire run. For example Q depth 128 with a batch of
64 will always send IO in batches of 64 so in effect once the Q depth
has been met the tool will wait until the Q depth has dropped enough
to send another 64. This will allow for a more accurate measurement
of batching performance vs sending IO one at a time.
Also added clarrifying note on usage the Q depth is per core, not
spread over all cores.
Signed-off-by: paul luse <paul.e.luse@intel.com>
Change-Id: Ieb1df5f668ae9c7b37b0d789fceab1138044a5e6
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/5489
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Community-CI: Mellanox Build Bot
f17e67059e