Prior to this patch the bdevperf application enabled using the zcopy API
by default. This means that on bdevs that don't natively support zcopy the
API emulates zero-copy by allocating a buffer. In my test environment, I
measured a 25% decrease in IOPS when zcopy was enabled. This patch changes
the default value so that zcopy is disabled by default. For bdevs that support
zcopy, use the -Z flag to enable using zcopy API.
Change-Id: Ib7e5c24f76eb16ffef038687daca58c0ffad1c1c
Signed-off-by: John Kariuki <John.K.Kariuki@intel.com>
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/4324
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
c5840d77b3