Date: Fri, 27 Nov 2020 13:25:12 +0000 (UTC) From: Alexander Motin <mav@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r368104 - stable/12/sys/cam Message-ID: <202011271325.0ARDPCKg057663@repo.freebsd.org>
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Author: mav Date: Fri Nov 27 13:25:12 2020 New Revision: 368104 URL: https://svnweb.freebsd.org/changeset/base/368104 Log: MFC r367862: Microoptimize cam_num_doneqs math in xpt_done(). Modified: stable/12/sys/cam/cam_xpt.c Directory Properties: stable/12/ (props changed) Modified: stable/12/sys/cam/cam_xpt.c ============================================================================== --- stable/12/sys/cam/cam_xpt.c Fri Nov 27 11:51:07 2020 (r368103) +++ stable/12/sys/cam/cam_xpt.c Fri Nov 27 13:25:12 2020 (r368104) @@ -179,7 +179,7 @@ struct cam_doneq { }; static struct cam_doneq cam_doneqs[MAXCPU]; -static int cam_num_doneqs; +static u_int __read_mostly cam_num_doneqs; static struct proc *cam_proc; SYSCTL_INT(_kern_cam, OID_AUTO, num_doneqs, CTLFLAG_RDTUN, @@ -4671,7 +4671,7 @@ xpt_done(union ccb *done_ccb) /* Store the time the ccb was in the sim */ done_ccb->ccb_h.qos.periph_data = cam_iosched_delta_t(done_ccb->ccb_h.qos.periph_data); - hash = (done_ccb->ccb_h.path_id + done_ccb->ccb_h.target_id + + hash = (u_int)(done_ccb->ccb_h.path_id + done_ccb->ccb_h.target_id + done_ccb->ccb_h.target_lun) % cam_num_doneqs; queue = &cam_doneqs[hash]; mtx_lock(&queue->cam_doneq_mtx);
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