linux-kernel - Re: [PATCH 2/6] perf, x86: Add Haswell specific transaction flag reporting v4

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Date:	Mon, 16 Sep 2013 13:08:05 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	mingo@...nel.org, acme@...radead.org, linux-kernel@...r.kernel.org,
	eranian@...gle.com, Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH 2/6] perf, x86: Add Haswell specific transaction flag
 reporting v4

On Fri, Sep 13, 2013 at 11:08:32AM -0700, Andi Kleen wrote:
> @@ -207,6 +207,8 @@ union hsw_tsx_tuning {
>  	u64	    value;
>  };
>  
> +#define PEBS_HSW_TSX_FLAGS	0xff00000000

That's a 64bit value and this needs ULL.

>  void init_debug_store_on_cpu(int cpu)
>  {
>  	struct debug_store *ds = per_cpu(cpu_hw_events, cpu).ds;
> @@ -893,6 +895,16 @@ static void __intel_pmu_pebs_event(struct perf_event *event,
>  	    (x86_pmu.intel_cap.pebs_format >= 2))
>  		data.weight = intel_hsw_weight(pebs);
>  
> +	if ((event->attr.sample_type & PERF_SAMPLE_TRANSACTION) &&
> +	    x86_pmu.intel_cap.pebs_format >= 2) {
> +		data.transaction =
> +			(pebs->tsx_tuning & PEBS_HSW_TSX_FLAGS) >> 32;

Screw checkpatch and make that an 81 char line or rename the thing
data.txn or so.

> +		/* For RTM XABORTs also log the abort code from AX */
> +		if ((data.transaction & PERF_SAMPLE_TXN_TRANSACTION) &&
> +		    (pebs->ax & 1))
> +			data.transaction |= pebs->ax & 0xff000000;

Yeah, do data.txn, that also allows the above line break to go away.

> +	}
> +
>  	if (has_branch_stack(event))
>  		data.br_stack = &cpuc->lbr_stack;
>  
> -- 
> 1.8.3.1
> 
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