From: Peter Zijlstra <peterz-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
To: "Waskiewicz Jr,
Peter P"
<peter.p.waskiewicz.jr-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Cc: Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Thomas Gleixner <tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org>,
Ingo Molnar <mingo-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
"H. Peter Anvin" <hpa-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org>,
Li Zefan <lizefan-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>,
"containers-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org"
<containers-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org>,
"cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: Re: [PATCH 0/4] x86: Add Cache QoS Monitoring (CQM) support
Date: Mon, 6 Jan 2014 22:26:23 +0100 [thread overview]
Message-ID: <20140106212623.GH30183@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <1389039035.32504.35.camel-29DAm2eTeB2q+SSgkFU3IPooFf0ArEBIu+b9c/7xato@public.gmane.org>
On Mon, Jan 06, 2014 at 08:10:45PM +0000, Waskiewicz Jr, Peter P wrote:
> There is one per logical CPU. However, in the current generation, they
> report on the usage of the same L3 cache. But the CPU takes care of the
> resolution of which MSR write and read comes from the logical CPU, so
> software doesn't need to lock access to it from different CPUs.
What are the rules of RMIDs, I can't seem to find that in the SDM and I
think you're tagging cachelines with them. Which would mean that in
order to (re) use them you need a complete cache (L3) wipe.
Without a wipe you keep having stale entries of the former user and no
clear indication on when your numbers are any good.
Also, is there any sane way of shooting down the entire L3?
next prev parent reply other threads:[~2014-01-06 21:26 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-03 20:34 [PATCH 0/4] x86: Add Cache QoS Monitoring (CQM) support Peter P Waskiewicz Jr
[not found] ` <1388781285-18067-1-git-send-email-peter.p.waskiewicz.jr-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2014-01-03 20:34 ` [PATCH 3/4] cgroup: Add new cacheqos cgroup subsys to support Cache QoS Monitoring Peter P Waskiewicz Jr
2014-01-03 20:34 ` [PATCH 4/4] Documentation: Add documentation for cacheqos cgroup Peter P Waskiewicz Jr
2014-01-04 16:10 ` [PATCH 0/4] x86: Add Cache QoS Monitoring (CQM) support Tejun Heo
[not found] ` <20140104161050.GA24306-Gd/HAXX7CRxy/B6EtB590w@public.gmane.org>
2014-01-04 22:43 ` Waskiewicz Jr, Peter P
[not found] ` <1388875369.9761.25.camel-29DAm2eTeB2q+SSgkFU3IPooFf0ArEBIu+b9c/7xato@public.gmane.org>
2014-01-04 22:50 ` Tejun Heo
[not found] ` <20140104225058.GC24306-Gd/HAXX7CRxy/B6EtB590w@public.gmane.org>
2014-01-05 5:23 ` Waskiewicz Jr, Peter P
[not found] ` <1388899376.9761.45.camel-29DAm2eTeB2q+SSgkFU3IPooFf0ArEBIu+b9c/7xato@public.gmane.org>
2014-01-06 11:16 ` Peter Zijlstra
[not found] ` <20140106111624.GB5623-ndre7Fmf5hadTX5a5knrm8zTDFooKrT+cvkQGrU6aU0@public.gmane.org>
2014-01-06 16:34 ` Waskiewicz Jr, Peter P
[not found] ` <1389026035.32504.3.camel-29DAm2eTeB2q+SSgkFU3IPooFf0ArEBIu+b9c/7xato@public.gmane.org>
2014-01-06 16:41 ` Peter Zijlstra
[not found] ` <20140106164150.GQ31570-ndre7Fmf5hadTX5a5knrm8zTDFooKrT+cvkQGrU6aU0@public.gmane.org>
2014-01-06 16:47 ` Waskiewicz Jr, Peter P
[not found] ` <1389026867.32504.16.camel-29DAm2eTeB2q+SSgkFU3IPooFf0ArEBIu+b9c/7xato@public.gmane.org>
2014-01-06 17:53 ` Peter Zijlstra
[not found] ` <20140106175338.GF30183-ndre7Fmf5hadTX5a5knrm8zTDFooKrT+cvkQGrU6aU0@public.gmane.org>
2014-01-06 18:05 ` Waskiewicz Jr, Peter P
2014-01-06 18:06 ` Peter Zijlstra
[not found] ` <20140106180636.GG30183-ndre7Fmf5hadTX5a5knrm8zTDFooKrT+cvkQGrU6aU0@public.gmane.org>
2014-01-06 20:10 ` Waskiewicz Jr, Peter P
[not found] ` <1389039035.32504.35.camel-29DAm2eTeB2q+SSgkFU3IPooFf0ArEBIu+b9c/7xato@public.gmane.org>
2014-01-06 21:26 ` Peter Zijlstra [this message]
[not found] ` <20140106212623.GH30183-ndre7Fmf5hadTX5a5knrm8zTDFooKrT+cvkQGrU6aU0@public.gmane.org>
2014-01-06 21:48 ` Waskiewicz Jr, Peter P
[not found] ` <1389044899.32504.43.camel-29DAm2eTeB2q+SSgkFU3IPooFf0ArEBIu+b9c/7xato@public.gmane.org>
2014-01-06 22:12 ` Peter Zijlstra
[not found] ` <20140106221251.GJ30183-ndre7Fmf5hadTX5a5knrm8zTDFooKrT+cvkQGrU6aU0@public.gmane.org>
2014-01-06 22:45 ` Waskiewicz Jr, Peter P
[not found] ` <1389048315.32504.57.camel-29DAm2eTeB2q+SSgkFU3IPooFf0ArEBIu+b9c/7xato@public.gmane.org>
2014-01-07 8:34 ` Peter Zijlstra
[not found] ` <20140107083440.GL30183-ndre7Fmf5hadTX5a5knrm8zTDFooKrT+cvkQGrU6aU0@public.gmane.org>
2014-01-07 15:15 ` Waskiewicz Jr, Peter P
[not found] ` <1389107743.32504.69.camel-29DAm2eTeB2q+SSgkFU3IPooFf0ArEBIu+b9c/7xato@public.gmane.org>
2014-01-07 21:12 ` Peter Zijlstra
[not found] ` <20140107211229.GF2480-RM5+C6weyIYnLiPH7yDmwOa11wxjtiyuLtmvbW2Dspo@public.gmane.org>
2014-01-10 18:55 ` Waskiewicz Jr, Peter P
[not found] ` <1389380100.32504.172.camel-29DAm2eTeB2q+SSgkFU3IPooFf0ArEBIu+b9c/7xato@public.gmane.org>
2014-01-13 7:55 ` Peter Zijlstra
[not found] ` <20140113075528.GR7572-RM5+C6weyIYnLiPH7yDmwOa11wxjtiyuLtmvbW2Dspo@public.gmane.org>
2014-01-14 17:58 ` H. Peter Anvin
[not found] ` <52D57AC2.3090109-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org>
2014-01-27 17:34 ` Peter Zijlstra
[not found] ` <20140127173420.GA9636-ndre7Fmf5hadTX5a5knrm8zTDFooKrT+cvkQGrU6aU0@public.gmane.org>
2014-02-18 17:29 ` Waskiewicz Jr, Peter P
[not found] ` <1392744567.3069.42.camel-29DAm2eTeB2q+SSgkFU3IPooFf0ArEBIu+b9c/7xato@public.gmane.org>
2014-02-18 19:35 ` Peter Zijlstra
[not found] ` <20140218193528.GQ14089-RM5+C6weyIYnLiPH7yDmwOa11wxjtiyuLtmvbW2Dspo@public.gmane.org>
2014-02-18 19:54 ` Waskiewicz Jr, Peter P
[not found] ` <1392753259.607.9.camel-29DAm2eTeB2q+SSgkFU3IPooFf0ArEBIu+b9c/7xato@public.gmane.org>
2014-02-20 16:58 ` Peter Zijlstra
2014-01-14 20:46 ` Waskiewicz Jr, Peter P
2014-01-06 11:08 ` Peter Zijlstra
[not found] ` <20140106110803.GA5623-ndre7Fmf5hadTX5a5knrm8zTDFooKrT+cvkQGrU6aU0@public.gmane.org>
2014-01-06 16:42 ` Waskiewicz Jr, Peter P
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