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Microoptimize cam_num_doneqs math in xpt_done().

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MFC after:	1 week
This commit is contained in:
Alexander Motin 2020-11-20 05:46:27 +00:00
parent dae0ba753c
commit 466d0a2572
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=367862
1 changed files with 2 additions and 2 deletions
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4
sys/cam/cam_xpt.c
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@ -178,7 +178,7 @@ 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,
@ -4620,7 +4620,7 @@ 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);