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Subject: Re: [hwloc-users] hwloc 0.9.3 not showing opt275 caches correctly?
From: Brock Palen (brockp_at_[hidden])
Date: 2010-01-25 14:30:37


yes they all show up as 1024K

cat /sys/devices/system/cpu/cpu*/cache/index*/size
1024K
1024K
1024K
1024K
1024K
1024K
1024K
1024K
1024K
1024K
1024K
1024K

Thanks for the input.

Brock Palen
www.umich.edu/~brockp
Center for Advanced Computing
brockp_at_[hidden]
(734)936-1985

On Jan 23, 2010, at 2:22 PM, Samuel Thibault wrote:

> Hello,
>
> Brock Palen, le Sat 23 Jan 2010 13:51:09 -0500, a écrit :
>> System(7870MB)
>> Node#0(3906MB) + Socket#0
>> L2(1024KB) + L1(1024KB) + Core#0 + P#0
>> L2(1024KB) + L1(1024KB) + Core#1 + P#1
>> Node#1(4040MB) + Socket#1
>> L2(1024KB) + L1(1024KB) + Core#0 + P#2
>> L2(1024KB) + L1(1024KB) + Core#1 + P#3
>>
>> If I am reading the AMD docs right, the L1 cache for each core should
>> be smaller, and in two parts, (data and instruction cache)
>> Also appears that L2 should be shared, as far as I can tell, it is
>> not
>> shared in this case.
>>
>> Am I looking at this wrong?
>
> No, that's the right interpretation of lstopo's output.
>
> However, the bug probably lies into your kernel's code. Could you
> check
>
> /sys/devices/system/cpu/cpu*/cache/index*/size
>
> ?
>
> Samuel
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>