Author: mav
Date: Wed Oct 23 17:55:35 2013
New Revision: 256995
URL: http://svnweb.freebsd.org/changeset/base/256995
Log:
Remove 128KB bzero() call done for every block I/O data buffer.
On my tests this improves performance of the new iSCSI target backed by
GEOM STRIPE of SSDs from 75K to 110K IOPS.
Reviewed by: ken
Modified:
head/sys/cam/ctl/ctl_backend_block.c
Modified: head/sys/cam/ctl/ctl_backend_block.c
==============================================================================
--- head/sys/cam/ctl/ctl_backend_block.c Wed Oct 23 17:24:21 2013
(r256994)
+++ head/sys/cam/ctl/ctl_backend_block.c Wed Oct 23 17:55:35 2013
(r256995)
@@ -1605,18 +1605,6 @@ ctl_be_block_open(struct ctl_be_block_so
}
static int
-ctl_be_block_mem_ctor(void *mem, int size, void *arg, int flags)
-{
- return (0);
-}
-
-static void
-ctl_be_block_mem_dtor(void *mem, int size, void *arg)
-{
- bzero(mem, size);
-}
-
-static int
ctl_be_block_create(struct ctl_be_block_softc *softc, struct ctl_lun_req *req)
{
struct ctl_be_block_lun *be_lun;
@@ -1644,8 +1632,7 @@ ctl_be_block_create(struct ctl_be_block_
mtx_init(&be_lun->lock, be_lun->lunname, NULL, MTX_DEF);
be_lun->lun_zone = uma_zcreate(be_lun->lunname, MAXPHYS,
- ctl_be_block_mem_ctor, ctl_be_block_mem_dtor, NULL, NULL,
- /*align*/ 0, /*flags*/0);
+ NULL, NULL, NULL, NULL, /*align*/ 0, /*flags*/0);
if (be_lun->lun_zone == NULL) {
snprintf(req->error_str, sizeof(req->error_str),
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