Re: 109-129 perf increase!!

Meelis Roos (mroos@tartu.cyber.ee)
Sun, 22 Nov 1998 21:53:28 +0200


GU> linux
GU> version2.1 sysV,semaphore lock/unlock time context switch time
GU> 109 6.8 4.1 -- 5.2 not stable
GU> 129 6.6 4.15
GU> 129SMP 7.2 5.8

GU> all timings are in microseconds. tests from posix book.

Increase in microseconds means decrease in performance, not increase.
But the lockings are almost (?) no-ops in UP case so it's clear that SMP
lockings take more time.

-- 
Meelis Roos (mroos@tartu.cyber.ee)

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