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To: Mikael Pettersson <mikpe@csd.uu.se>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [PATCH] x86 performance counters driver 3.0-pre2 for 2.5.44: [2/4] x86 support
References: <200210241500.RAA03585@kim.it.uu.se>
From: Andi Kleen <ak@muc.de>
Date: 24 Oct 2002 17:49:55 +0200
In-Reply-To: <200210241500.RAA03585@kim.it.uu.se>
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Mikael Pettersson <mikpe@csd.uu.se> writes:

> +struct per_cpu_cache {	/* roughly a subset of perfctr_cpu_state */
> +	union {
> +		unsigned int p5_cesr;
> +		unsigned int id;	/* cache owner id */
> +	} k1;
> +	struct {
> +		/* NOTE: these caches have physical indices, not virtual */
> +		unsigned int evntsel[18];
> +		unsigned int escr[0x3E2-0x3A0];
> +		unsigned int pebs_enable;
> +		unsigned int pebs_matrix_vert;
> +	} control;
> +} __attribute__((__aligned__(SMP_CACHE_BYTES)));
> +static struct per_cpu_cache per_cpu_cache[NR_CPUS] __cacheline_aligned;

This should use per cpu data (asm/percpu.h) to save memory.

-Andi