Re: slab.c change request

From: Jes Sorensen (Jes.Sorensen@cern.ch)
Date: Sat Apr 29 2000 - 05:17:27 EST


>>>>> "Berkley" == Berkley Shands <berkley@cs.wustl.edu> writes:

Berkley> [2.] Full description of the problem/report: on big machines
Berkley> (> 256mb RAM), there is sometimes a need to allocate large
Berkley> chunks of contiguous memory (gigabit network cards, etc) a
Berkley> 1.2Gb/sec network card can hit the PCI bus at 95-107
Berkley> MByte/sec. a 768 MB P3-600 can buffer up to 6 seconds of data
Berkley> :-) Really now, a 256K buffer will not handle that data
Berkley> rate. Make it reasonable at 2MBytes.

Most modern hardware will do scatter/gather so they don't need
contiguous memory. But then again Gigabit Ethernet only goes up to 9K
packets with Jumbo frames, it doesn't require 2MB allocations.

Jes

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