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From: Wang YanQing <udknight@gmail.com>
To: afaerber@suse.de
Cc: linux-kernel@vger.kernel.org, linux-soc@vger.kernel.org,
	linux-realtek-soc@lists.infradead.org
Subject: perf record doesn't work on rtd129x SoC
Date: Wed, 4 Dec 2019 12:55:59 +0800	[thread overview]
Message-ID: <20191204045559.GA10458@udknight> (raw)

Hi Andreas Färber!

I use "perf record" to debug performance issue on RTD1296 SOC, it does't work, but
the "perf stat" is ok!

After some dig in the kernel, I find the reason is no pmu overflow interrupt, I think
below pmu configuration isn't right for RTD1296:
"
        arm_pmu: arm-pmu {
                compatible = "arm,cortex-a53-pmu";
                interrupts = <GIC_SPI 48 IRQ_TYPE_LEVEL_HIGH>;
        };
"

We need 4 PMU SPI for RTD1296 (4 cores), and I guess the 48 isn't right too.

Any suggestion is welcome.

Thanks!




             reply	other threads:[~2019-12-04  5:02 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-04  4:55 Wang YanQing [this message]
2019-12-04  7:28 ` perf record doesn't work on rtd129x SoC Andreas Färber
2019-12-04 11:20   ` Robin Murphy
2019-12-04 11:38     ` Marc Zyngier
2019-12-04 14:51     ` Robin Murphy
2019-12-09  9:18       ` Wang YanQing

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