Avoid extra swi_sched() call, if this SIM is already queued.
It reduces overhead for coalesced command completions.
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3b02c4a3d3
commit
788fb3767d
@ -4198,12 +4198,12 @@ xpt_done(union ccb *done_ccb)
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mtx_lock(&cam_simq_lock);
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TAILQ_INSERT_TAIL(&cam_simq, sim,
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links);
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sim->flags |= CAM_SIM_ON_DONEQ;
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mtx_unlock(&cam_simq_lock);
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sim->flags |= CAM_SIM_ON_DONEQ;
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if ((done_ccb->ccb_h.path->periph->flags &
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CAM_PERIPH_POLLED) == 0)
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swi_sched(cambio_ih, 0);
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}
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if ((done_ccb->ccb_h.path->periph->flags &
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CAM_PERIPH_POLLED) == 0)
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swi_sched(cambio_ih, 0);
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break;
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default:
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panic("unknown periph type %d",
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@ -4889,16 +4889,20 @@ camisr(void *dummy)
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mtx_lock(&cam_simq_lock);
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TAILQ_INIT(&queue);
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TAILQ_CONCAT(&queue, &cam_simq, links);
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mtx_unlock(&cam_simq_lock);
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while (!TAILQ_EMPTY(&cam_simq)) {
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TAILQ_CONCAT(&queue, &cam_simq, links);
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mtx_unlock(&cam_simq_lock);
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while ((sim = TAILQ_FIRST(&queue)) != NULL) {
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TAILQ_REMOVE(&queue, sim, links);
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CAM_SIM_LOCK(sim);
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sim->flags &= ~CAM_SIM_ON_DONEQ;
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camisr_runqueue(&sim->sim_doneq);
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CAM_SIM_UNLOCK(sim);
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while ((sim = TAILQ_FIRST(&queue)) != NULL) {
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TAILQ_REMOVE(&queue, sim, links);
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CAM_SIM_LOCK(sim);
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sim->flags &= ~CAM_SIM_ON_DONEQ;
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camisr_runqueue(&sim->sim_doneq);
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CAM_SIM_UNLOCK(sim);
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}
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mtx_lock(&cam_simq_lock);
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}
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mtx_unlock(&cam_simq_lock);
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}
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static void
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