Re: [PATCH v4 00/11] perf: Intel Cache QoS Monitoring support

[Matt Fleming]

On Tue, 25 Nov, at 02:55:09PM, Matt Fleming wrote:
> On Fri, 14 Nov, at 09:15:01PM, Matt Fleming wrote:
> > From: Matt Fleming <matt.fleming@xxxxxxxxx>
> > 
> > This patch series adds a new PMU driver for the Intel Cache Monitoring
> > hardware feature available in Intel Xeon processors, which allows
> > monitoring of LLC occupancy on a task, group or system-wide basis.
> > 
> > The first few patches modify tools/perf to handle per-package counters,
> > which necessitates discarding some values when doing per-cpu reads to
> > avoid getting duplicate data. The rest add support for the new PMU code.
> > 
> > I've left a notoriously funky bit of code near the end of the series,
> > the RMID rotation code, in an attempt to simplify things. Doing the
> > rotation provides the ability to multiplex the RMIDs and basically
> > overcome the hardware limitation, but the rest of the patches work fine
> > without it. But there are a number of scenarios where being able to
> > monitor more tasks than RMIDs is extremely useful.
> > 
> > The series is based on tip/perf/core.
> 
> Any feedback on this series?
> 
> Stephane, the original thread is here, 
> 
>   https://lkml.kernel.org/r/1415999712-5850-1-git-send-email-matt@xxxxxxxxxxxxxxxxx

Ping.

-- 
Matt Fleming, Intel Open Source Technology Center
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