Re: Terrible IO performance when using 4GB of RAM on a 32 bit machine [solved]

Robert Hancock wrote: Peter Rabbitson wrote: reg00: base=0x ( 0MB), size=2048MB: write-back, count=1 reg01: base=0x8000 (2048MB), size=1024MB: write-back, count=1 reg02: base=0xc000 (3072MB), size= 512MB: write-back, count=1 reg03: base=0xe000 (3584MB), size= 256MB:

Re: Terrible IO performance when using 4GB of RAM on a 32 bit machine [solved]

Robert Hancock wrote: Peter Rabbitson wrote: reg00: base=0x ( 0MB), size=2048MB: write-back, count=1 reg01: base=0x8000 (2048MB), size=1024MB: write-back, count=1 reg02: base=0xc000 (3072MB), size= 512MB: write-back, count=1 reg03: base=0xe000 (3584MB), size= 256MB:

Re: Terrible IO performance when using 4GB of RAM on a 32 bit machine

Peter Rabbitson wrote: Robert Hancock wrote: Peter Rabbitson wrote: H. Peter Anvin wrote: What does /proc/mtrr look like in the two cases? Identical for mem=3900 and without it. reg00: base=0x ( 0MB), size=2048MB: write-back, count=1 reg01: base=0x8000 (2048MB),

Re: Terrible IO performance when using 4GB of RAM on a 32 bit machine

Robert Hancock wrote: Peter Rabbitson wrote: H. Peter Anvin wrote: What does /proc/mtrr look like in the two cases? Identical for mem=3900 and without it. reg00: base=0x ( 0MB), size=2048MB: write-back, count=1 reg01: base=0x8000 (2048MB), size=1024MB: write-back, count=1

Re: Terrible IO performance when using 4GB of RAM on a 32 bit machine

Robert Hancock wrote: Peter Rabbitson wrote: H. Peter Anvin wrote: What does /proc/mtrr look like in the two cases? Identical for mem=3900 and without it. reg00: base=0x ( 0MB), size=2048MB: write-back, count=1 reg01: base=0x8000 (2048MB), size=1024MB: write-back, count=1

Re: Terrible IO performance when using 4GB of RAM on a 32 bit machine

Peter Rabbitson wrote: Robert Hancock wrote: Peter Rabbitson wrote: H. Peter Anvin wrote: What does /proc/mtrr look like in the two cases? Identical for mem=3900 and without it. reg00: base=0x ( 0MB), size=2048MB: write-back, count=1 reg01: base=0x8000 (2048MB),

Re: Terrible IO performance when using 4GB of RAM on a 32 bit machine

Peter Rabbitson wrote: 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=0x ( 0MB), size=2048MB:

Re: Terrible IO performance when using 4GB of RAM on a 32 bit machine

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=0x ( 0MB), size=2048MB: write-back, count=1 reg01:

Re: Terrible IO performance when using 4GB of RAM on a 32 bit machine

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? -hpa - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED]

Terrible IO performance when using 4GB of RAM on a 32 bit machine

Hello everyone, I hope this question is not too basic for the intended audience. I have a server with an Intel SE7210TP1-E motherboard[1] and a single 3.4GHz P4 CPU[2]. I am currently running a vanilla 2.6.21.5 kernel with SMP/HT. Two patches are applied: one is a SATA driver[3] and the other

Terrible IO performance when using 4GB of RAM on a 32 bit machine

Hello everyone, I hope this question is not too basic for the intended audience. I have a server with an Intel SE7210TP1-E motherboard[1] and a single 3.4GHz P4 CPU[2]. I am currently running a vanilla 2.6.21.5 kernel with SMP/HT. Two patches are applied: one is a SATA driver[3] and the other

Re: Terrible IO performance when using 4GB of RAM on a 32 bit machine

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? -hpa - To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to [EMAIL PROTECTED] More

Re: Terrible IO performance when using 4GB of RAM on a 32 bit machine

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=0x ( 0MB), size=2048MB: write-back, count=1 reg01:

Re: Terrible IO performance when using 4GB of RAM on a 32 bit machine

Peter Rabbitson wrote: 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=0x ( 0MB), size=2048MB: