Date: Wed, 23 Oct 2013 17:55:35 +0000 (UTC) From: Alexander Motin <mav@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r256995 - head/sys/cam/ctl Message-ID: <201310231755.r9NHtZVG079192@svn.freebsd.org>
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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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