linux-kernel - Re: [PATCH 4/7] perf/x86-ibs: Add support for IBS pseudo events

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Date:	Mon, 07 May 2012 14:08:48 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Robert Richter <robert.richter@....com>
Cc:	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Ingo Molnar <mingo@...nel.org>,
	Stephane Eranian <eranian@...gle.com>,
	Jiri Olsa <jolsa@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 4/7] perf/x86-ibs: Add support for IBS pseudo events

On Wed, 2012-05-02 at 20:26 +0200, Robert Richter wrote:

> This patch includes kernel and userland changes.
> 
> Signed-off-by: Robert Richter <robert.richter@....com>
> ---
>  arch/x86/kernel/cpu/perf_event_amd_ibs.c |   83 ++++++-
>  tools/perf/util/pmu-ibs.c                |  433 +++++++++++++++++++++++++-----

I think its best to separate this.

>  2 files changed, 445 insertions(+), 71 deletions(-)
> 
> diff --git a/arch/x86/kernel/cpu/perf_event_amd_ibs.c b/arch/x86/kernel/cpu/perf_event_amd_ibs.c
> index 03743ad..1675479 100644
> --- a/arch/x86/kernel/cpu/perf_event_amd_ibs.c
> +++ b/arch/x86/kernel/cpu/perf_event_amd_ibs.c
> @@ -478,6 +478,81 @@ static struct perf_ibs perf_ibs_op = {
>  	.get_count		= get_ibs_op_count,
>  };
>  
> +enum ibs_filter_type {
> +	IBS_NO_FILTER		= 0,
> +	IBS_MATCH_FILTER	= 1,
> +	IBS_ANY_SET_FILTER	= 2,
> +	IBS_PSEUDO_EVENT	= 0x0F,
> +};
> +
> +struct ibs_filter {
> +	struct {
> +		u16		idx		: 8;
> +		u16		reserved	: 4;
> +		u16		type		: 4;
> +	};
> +	union {
> +		struct {
> +			u8	mask;
> +			u8	match;
> +		};
> +		u16		any;
> +	};
> +};

> diff --git a/tools/perf/util/pmu-ibs.c b/tools/perf/util/pmu-ibs.c
> index 07acb82..604cb8c 100644
> --- a/tools/perf/util/pmu-ibs.c
> +++ b/tools/perf/util/pmu-ibs.c


> +enum ibs_filter_type {
> +	IBS_NO_FILTER		= 0,
> +	IBS_MATCH_FILTER	= 1,
> +	IBS_ANY_SET_FILTER	= 2,
> +	IBS_PSEUDO_EVENT	= 0x0F,
> +};
> +
> +struct ibs_filter {
> +	struct {
> +		__u16		idx		: 8;
> +		__u16		reserved	: 4;
> +		__u16		type		: 4;
> +	};
> +	union {
> +		struct {
> +			__u8	mask;
> +			__u8	match;
> +		};
> +		__u16		any;
> +	};
> +};

Having two copies of this just stinks, its only matter of time before
one receives changes the other doesn't.


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