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From: Peter Zijlstra <peterz@infradead.org>
To: Vineet Gupta <Vineet.Gupta1@synopsys.com>
Cc: linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org,
	arnd@arndb.de, Alexey Brodkin <Alexey.Brodkin@synopsys.com>,
	arc-linux-dev@synopsys.com,
	Arnaldo Carvalho de Melo <acme@kernel.org>
Subject: Re: [PATCH 4/8] ARCv2: perf: Support sampling events using overflow interrupts
Date: Mon, 15 Jun 2015 18:25:25 +0200	[thread overview]
Message-ID: <20150615162525.GH3644@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <1433852372-29494-5-git-send-email-vgupta@synopsys.com>

On Tue, Jun 09, 2015 at 05:49:28PM +0530, Vineet Gupta wrote:
> +	if (arc_pmu->has_interrupts) {
> +		int irq = platform_get_irq(pdev, 0);

Hmm, so you're requesting a regular interrupt.

I see your architecture has IRQ priorities, could you play games and
create NMIs using those?

For example, never mask L1 (assuming that's the highest priority) and
treat that as an NMI.

  parent reply	other threads:[~2015-06-15 16:25 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-06-09 12:19 [PATCH 0/8] ARCv2 port to Linux - (C) perf Vineet Gupta
2015-06-09 12:19 ` [PATCH 1/8] ARC: perf: support RAW events Vineet Gupta
2015-06-15 15:30   ` Peter Zijlstra
2015-06-16 11:45     ` Alexey Brodkin
2015-06-17 13:33       ` Peter Zijlstra
2015-06-17 14:10         ` Vineet Gupta
2015-06-22 14:41           ` Peter Zijlstra
2015-06-23 12:20             ` Vineet Gupta
2015-06-17 12:32     ` Vineet Gupta
2015-06-09 12:19 ` [PATCH 2/8] ARC: perf: cap the number of counters to hardware max of 32 Vineet Gupta
2015-06-09 12:19 ` [PATCH 3/8] ARCv2: perf: implement "event_set_period" for future use with interrupts Vineet Gupta
2015-06-15 15:38   ` Peter Zijlstra
2015-06-22 15:26     ` Alexey Brodkin
2015-06-09 12:19 ` [PATCH 4/8] ARCv2: perf: Support sampling events using overflow interrupts Vineet Gupta
2015-06-15 15:48   ` Peter Zijlstra
2015-06-22 15:57     ` Alexey Brodkin
2015-06-15 16:25   ` Peter Zijlstra [this message]
2015-06-16  5:37     ` Vineet Gupta
2015-06-16  9:07       ` Peter Zijlstra
2015-06-16  9:33         ` Vineet Gupta
2015-06-17 11:48         ` Vineet Gupta
2015-06-17 12:44           ` Peter Zijlstra
2015-06-09 12:19 ` [PATCH 5/8] ARCv2: perf: set usable max period as a half of real max period Vineet Gupta
2015-06-09 12:19 ` [PATCH 6/8] ARCv2: perf: implement exclusion of event counting in user or kernel mode Vineet Gupta
2015-06-09 12:19 ` [PATCH 7/8] ARCv2: perf: SMP support Vineet Gupta
2015-06-09 12:19 ` [PATCH 8/8] ARCv2: perf: Finally introduce HS perf unit Vineet Gupta

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