Messages in this thread | | | Subject | SV: Efficient IPC mechanism on Linux | Date | Wed, 10 Sep 2003 13:23:18 +0200 | From | "Lars Hammarstrand" <> |
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>>>On Wed, Sep 10, 2003 at 12:54:32PM +0200, Luca Veraldi wrote: >> > Memory is sort of starting to be like disk IO in this regard. >> >> Good. So the less you copy memory all around, the better you permorm. >> >Actually it's "the less discontiguos memory you touch the better you perform". Just like a 128Kb read is about the same cost as a 4Kb disk read, the same >>is starting to become true for memory copies. So in the extreme the memory copy is one operation only.
Well yes, that might be true for a one user desktop system. But shouldn't we meet the demands from the "data center" users as well? Now, I do hereby claim that: 1000 process/threads doing 128Kb reads is _absolute_ not the same as 1000 process/threads doing 4Kb disk reads in terms of i/o, memory and bus bandwidth.
Anyone willing to bet on this one?
Bottom line - don't waste unnecessary bandwidth, others might need it. --
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