In message <43608FE3.9050406_at_freebsd.org>, David Xu writes: >Poul-Henning Kamp wrote: >> In message <43607DD5.3020708_at_freebsd.org>, David Xu writes: >> >>>Check gettimeofday syscall, it follows every I/O syscall, I think >>>our gettimeofday is tooooooo expensive, if we can directly get time from >>>memory, the performance will be improved further. >> >> Why would anybody take a timestamp at all I/O syscalls ? >> >> "I wonder why my car can only go 30 km/h with the trunk full of concrete" ? >> >> In a data base application I could possibly understand a timestamp >> after every write. >> >> But after _all_ I/O syscalls ? That's just plain stupid... > >Don't panic, I agree that is stupid code, but I can not change it, it >is not written by me, sorry! I'm not panicing, I'm merely pointing out that we should not optimize performance after bogus code but rather try to improve it. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk_at_FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence.Received on Thu Oct 27 2005 - 08:37:31 UTC
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