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Subject: Re: [hwloc-users] Zero cache line size on Power7?
From: Brice Goglin (Brice.Goglin_at_[hidden])
Date: 2013-02-27 17:19:52


I think I've seen cases where the device-tree contains 0 for such line
sizes.
I guess we should document that the line size is 0 means unknown.

Can you send the tarball generated by hwloc-gather-topology ? (send it
only to, in a private email)

Brice

Le 27/02/2013 23:11, Erik Schnetter a écrit :
> I am running hwloc 1.7a1r5312 on a Power7 architecture. I find there a
> level 2 cache with a cacheline size of 0. Is this to be expected? The
> documentation doesn't say that determining the cacheline size may fail.
>
> I query the cache parameters from my application with these results:
>
> Cache (unknown name) has type "data" depth 1
> size 32768 linesize 128 associativity 8 stride 4096
> Cache (unknown name) has type "unified" depth 2
> size 262144 linesize 0 associativity 8 stride 32768
>
> -erik
>
> --
> Erik Schnetter <schnetter_at_[hidden] <mailto:schnetter_at_[hidden]>>
> http://www.perimeterinstitute.ca/personal/eschnetter/
>
>
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