From: Matt Fleming <matt@console-pimps.org>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@kernel.org>, Jiri Olsa <jolsa@redhat.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
linux-kernel@vger.kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
Matt Fleming <matt.fleming@intel.com>
Subject: Re: [PATCH 11/11] perf/x86/intel: Perform rotation on Intel CQM RMIDs
Date: Wed, 8 Oct 2014 21:04:58 +0100 [thread overview]
Message-ID: <20141008200458.GV14343@console-pimps.org> (raw)
In-Reply-To: <20141008181044.GI4750@worktop.programming.kicks-ass.net>
On Wed, 08 Oct, at 08:10:44PM, Peter Zijlstra wrote:
> On Wed, Sep 24, 2014 at 03:04:15PM +0100, Matt Fleming wrote:
> > + limbo_bitmap = kmalloc(sizeof(long) * BITS_TO_LONGS(nr_bits) *
> > + nr_cpumask_bits, GFP_KERNEL);
>
> That's going to be a _huge_ amount of memory on SGI class systems. Do we
> really need per-cpu storage for this?
Ah, no we don't.
Allocating it the above way just makes things easier because you can
index the array directly using your cpu.
I'll shrink this down to the minimum memory needed.
--
Matt Fleming, Intel Open Source Technology Center
next prev parent reply other threads:[~2014-10-08 20:05 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-24 14:04 [PATCH 00/11] perf: Intel Cache QoS Monitoring support Matt Fleming
2014-09-24 14:04 ` [PATCH 01/11] perf stat: Fix AGGR_CORE segfault on multi-socket system Matt Fleming
2014-09-24 14:04 ` [PATCH 02/11] perf tools: Refactor unit and scale function parameters Matt Fleming
2014-09-29 9:21 ` Jiri Olsa
2014-10-03 5:25 ` [tip:perf/core] " tip-bot for Matt Fleming
2014-09-24 14:04 ` [PATCH 03/11] perf tools: Parse event per-package info files Matt Fleming
2014-09-24 14:04 ` [PATCH 04/11] perf: Make perf_cgroup_from_task() global Matt Fleming
2014-10-07 18:51 ` Peter Zijlstra
2014-10-08 10:27 ` Matt Fleming
2014-09-24 14:04 ` [PATCH 05/11] perf: Add ->count() function to read per-package counters Matt Fleming
2014-09-24 14:04 ` [PATCH 06/11] perf: Move cgroup init before PMU ->event_init() Matt Fleming
2014-10-07 19:34 ` Peter Zijlstra
2014-10-08 10:32 ` Matt Fleming
2014-10-08 10:49 ` Peter Zijlstra
2014-09-24 14:04 ` [PATCH 07/11] x86: Add support for Intel Cache QoS Monitoring (CQM) detection Matt Fleming
2014-09-24 14:04 ` [PATCH 08/11] perf/x86/intel: Add Intel Cache QoS Monitoring support Matt Fleming
2014-09-24 16:40 ` Andi Kleen
2014-09-24 20:27 ` Matt Fleming
2014-09-24 20:39 ` Andi Kleen
2014-09-29 18:51 ` Matt Fleming
2014-10-07 19:43 ` Peter Zijlstra
2014-10-08 10:36 ` Matt Fleming
2014-10-08 12:15 ` Matt Fleming
2014-10-08 14:47 ` Peter Zijlstra
2014-10-08 20:51 ` Peter Zijlstra
2014-09-24 14:04 ` [PATCH 09/11] perf/x86/intel: Implement LRU monitoring ID allocation for CQM Matt Fleming
2014-10-08 9:51 ` Peter Zijlstra
2014-10-08 10:53 ` Matt Fleming
2014-09-24 14:04 ` [PATCH 10/11] perf/x86/intel: Support task events with Intel CQM Matt Fleming
2014-09-24 14:45 ` Matt Fleming
2014-10-08 10:01 ` Peter Zijlstra
2014-10-08 11:07 ` Peter Zijlstra
2014-10-08 12:10 ` Matt Fleming
2014-10-08 14:49 ` Peter Zijlstra
2014-10-10 12:02 ` Matt Fleming
2014-10-10 14:02 ` Peter Zijlstra
2014-10-10 10:54 ` Peter Zijlstra
2014-10-10 11:10 ` Matt Fleming
2014-09-24 14:04 ` [PATCH 11/11] perf/x86/intel: Perform rotation on Intel CQM RMIDs Matt Fleming
2014-10-08 11:19 ` Peter Zijlstra
2014-10-08 11:56 ` Matt Fleming
2014-10-08 18:08 ` Peter Zijlstra
2014-10-08 19:02 ` Thomas Gleixner
2014-10-08 19:59 ` Matt Fleming
2014-10-08 18:10 ` Peter Zijlstra
2014-10-08 20:04 ` Matt Fleming [this message]
-- strict thread matches above, loose matches on Subject: below --
2014-10-01 14:36 [PATCH v2 00/11] perf: Intel Cache QoS Monitoring support Matt Fleming
2014-10-01 14:36 ` [PATCH 11/11] perf/x86/intel: Perform rotation on Intel CQM RMIDs Matt Fleming
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