Messages in this thread |  | | Date | Tue, 17 Jul 2001 11:11:55 -0700 (PDT) | | From | Davide Libenzi <> | | Subject | Re: [Lse-tech] Re: CPU affinity & IPI latency (FIX)_ |
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On 17-Jul-2001 Hubertus Frnake wrote: > In an attempt to inline the code, somehow the tabs got lost. So here is the > attached correct patch fo 2.4.5. Please try and let me know whether you > see your problems disappear and/or others arise. > The sketchy writeup is still the same.
What is the reason You don't set the resched task in the fast path ?
best_cpu = p->processor; if (can_schedule(p, best_cpu)) { tsk = idle_task(best_cpu); if ((cpu_curr(best_cpu) == tsk) && (cpu_resched(best_cpu) == NULL)) { int need_resched; send_now_idle: /* * If need_resched == -1 then we can skip sending * the IPI altogether, tsk->need_resched is * actively watched by the idle thread. */ need_resched = tsk->need_resched; tsk->need_resched = 1; if ((best_cpu != this_cpu) && !need_resched) { >>>> cpu_resched(best_cpu) = p; smp_send_reschedule(best_cpu); } return; } }
- Davide
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