Date: Thu, 23 Apr 2015 09:50:06 +0300 From: Slawa Olhovchenkov <slw@zxy.spb.ru> To: Adrian Chadd <adrian@freebsd.org> Cc: "freebsd-arch@freebsd.org" <freebsd-arch@freebsd.org>, freebsd-current <freebsd-current@freebsd.org> Subject: Re: help with sandybridge/ivybridge hwpmc NUMA DRAM counters Message-ID: <20150423065006.GV1394@zxy.spb.ru> In-Reply-To: <CAJ-VmomZNDFE9%2BQJhZ2H8aRmCbk7RNrk%2BUyUA5_KK2z=yHkiyA@mail.gmail.com> References: <CAJ-VmomZNDFE9%2BQJhZ2H8aRmCbk7RNrk%2BUyUA5_KK2z=yHkiyA@mail.gmail.com>
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On Wed, Apr 22, 2015 at 11:38:22PM -0700, Adrian Chadd wrote:
> hi all,
>
> I'm having a spot of problem trying to get the local/remote dram
> counters working on the NUMA sandybridge and ivybridge systems here.
>
> Things work fine using intel-pcm, but those same counters don't work with hwpmc.
>
> Sandybridge - there's apparently an MSR that needs to be fiddled if
> the counters are active.
>
> Ivybridge - the v1 and v2 chips have different local/remote dram
> counters, and on my v2 setup there's actually /two/ LOCAL_DRAM:
# pmccontrol -L | grep DRAM
MEM_LOAD_UOPS_LLC_MISS_RETIRED.LOCAL_DRAM
MEM_LOAD_UOPS_LLC_MISS_RETIRED.REMOTE_DRAM
CPU: Intel(R) Xeon(R) CPU E5-2650 v2 @ 2.60GHz (2600.05-MHz K8-class CPU)
> adrian@testbox1:~/git/github/erikarn/freebsd/sys/dev/hwpmc %
> pmccontrol -L | grep DRAM
> MEM_LOAD_UOPS_LLC_MISS_RETIRED.LOCAL_DRAM
> MEM_LOAD_UOPS_LLC_MISS_RETIRED.LOCAL_DRAM
> MEM_LOAD_UOPS_LLC_MISS_RETIRED.REMOTE_DRAM
>
> Now, i may be able to get to figuring this out at some point in the
> distant future, but I'd really appreciate any help I can get now. I'm
> now at the point with the NUMA affinity API stuff where I'm now
> chasing down when things are correctly working with local/remote RAM,
> and I'd really like to use hwpmc in sampling mode to work on it.
>
> Thanks for any help!
>
>
>
> -adrian
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