Messages in this thread |  | | Date | Thu, 13 May 1999 20:58:44 +0200 (CEST) | | From | Andrea Arcangeli <> | | Subject | Re: [RFT] 2.2.8_andrea1 wake-one [Re: Overscheduling DOES happen with high web server load.] |
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On Thu, 13 May 1999, David S. Miller wrote:
>"Completely"? I beg to differ, watch and you will see that on every >new TCP connection, there will be 2 spurious and unnecessary wakeups,
Ah I didn't thought about this. Right.
Hmm maybe this is the reason I couldn't understand for which apache sleeps in flock(LOCK_EX) instead of in accept(2)? If there was 10 apache task sleeping in accpet(2) then there would been as worse 30 reschedule where only 1 task would go ahead accepting the connection for real.
Anyway I rejected from my tree my version of the wake-one since with my approch wake_up continue to browse the whole list of sleepers (it can address only the overschedule problem). I don't think there will be interest in my approch since 2.3.1 will do the better thing.
Andrea Arcangeli
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