linux-kernel - Re: [PATCH V6 06/13] perf: Add Nehalem and Sandy Bridge uncore support

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Message-ID: <1339781398.2559.94.camel@twins>
Date:	Fri, 15 Jun 2012 19:29:58 +0200
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	"Yan, Zheng" <zheng.z.yan@...el.com>
Cc:	mingo@...e.hu, jolsa@...hat.com, eranian@...gle.com,
	andi@...stfloor.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH V6 06/13] perf: Add Nehalem and Sandy Bridge uncore
 support

On Fri, 2012-06-15 at 14:31 +0800, Yan, Zheng wrote:
> +static struct uncore_event_desc nhm_uncore_events[] = {
> +       INTEL_UNCORE_EVENT_DESC(CLOCKTICKS, "config=0xffff"),

Why does that use config=0xffff, also I couldn't find event 0xff listed,
is it special-cased somewhere?

> +       /* full cache line writes to DRAM */
> +       INTEL_UNCORE_EVENT_DESC(QMC_WRITES_FULL_ANY, "event=0x2f,umask=0xf"),
> +       /* Quickpath Memory Controller normal priority read requests */
> +       INTEL_UNCORE_EVENT_DESC(QMC_NORMAL_READS_ANY, "event=0x2c,umask=0xf"),
> +       /* Quickpath Home Logic read requests from the IOH */
> +       INTEL_UNCORE_EVENT_DESC(QHL_REQUEST_IOH_READS,
> +                               "event=0x20,umask=0x1"),
> +       /* Quickpath Home Logic write requests from the IOH */
> +       INTEL_UNCORE_EVENT_DESC(QHL_REQUEST_IOH_WRITES,
> +                               "event=0x20,umask=0x2"),
> +       /* Quickpath Home Logic read requests from a remote socket */
> +       INTEL_UNCORE_EVENT_DESC(QHL_REQUEST_REMOTE_READS,
> +                               "event=0x20,umask=0x4"),
> +       /* Quickpath Home Logic write requests from a remote socket */
> +       INTEL_UNCORE_EVENT_DESC(QHL_REQUEST_REMOTE_WRITES,
> +                               "event=0x20,umask=0x8"),
> +       /* Quickpath Home Logic read requests from the local socket */
> +       INTEL_UNCORE_EVENT_DESC(QHL_REQUEST_LOCAL_READS,
> +                               "event=0x20,umask=0x10"),
> +       /* Quickpath Home Logic write requests from the local socket */
> +       INTEL_UNCORE_EVENT_DESC(QHL_REQUEST_LOCAL_WRITES,
> +                               "event=0x20,umask=0x20"),
> +       { /* end: all zeroes */ },
> +}; 

The rest of the events seem to be valid on both NHM and WSM, I didn't
look very closely, but it looks like WSM has a few extra events, but
includes all NHM events.


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