linux-kernel - perf record doesn't work on rtd129x SoC

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <20191204045559.GA10458@udknight>
Date:   Wed, 4 Dec 2019 12:55:59 +0800
From:   Wang YanQing <udknight@...il.com>
To:     afaerber@...e.de
Cc:     linux-kernel@...r.kernel.org, linux-soc@...r.kernel.org,
        linux-realtek-soc@...ts.infradead.org
Subject: perf record doesn't work on rtd129x SoC

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!