Messages in this thread | | | Date | Fri, 22 Jun 2007 01:02:05 +0200 | From | Peter Rabbitson <> | Subject | Re: Terrible IO performance when using 4GB of RAM on a 32 bit machine |
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H. Peter Anvin wrote: > Peter Rabbitson wrote: >> I have captured dmesg output without mem[5], with mem=3900M[6] and >> mem=2048M[7]. >> > > What does /proc/mtrr look like in the two cases? >
Identical for mem=3900 and without it.
reg00: base=0x00000000 ( 0MB), size=2048MB: write-back, count=1
reg01: base=0x80000000 (2048MB), size=1024MB: write-back, count=1
reg02: base=0xc0000000 (3072MB), size= 512MB: write-back, count=1
reg03: base=0xe0000000 (3584MB), size= 256MB: write-back, count=1
reg04: base=0xf0000000 (3840MB), size= 128MB: write-back, count=1
reg05: base=0xf8000000 (3968MB), size= 32MB: write-back, count=1
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