linux-kernel - Re: [PATCH] perf: RISC-V: Remove PERF_HES_STOPPED flag checking in riscv_pmu

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Message-Id: <168917713751.21773.4886524771952268051.b4-ty@rivosinc.com>
Date:   Wed, 12 Jul 2023 08:52:17 -0700
From:   Palmer Dabbelt <palmer@...osinc.com>
To:     atishp@...shpatra.org, anup@...infault.org,
        Will Deacon <will@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Palmer Dabbelt <palmer@...belt.com>,
        linux-riscv@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Eric Lin <eric.lin@...ive.com>
Cc:     greentime.hu@...ive.com, vincent.chen@...ive.com
Subject: Re: [PATCH] perf: RISC-V: Remove PERF_HES_STOPPED flag checking in
 riscv_pmu_start()


On Mon, 10 Jul 2023 15:43:28 +0000, Eric Lin wrote:
> Since commit 096b52fd2bb4 ("perf: RISC-V: throttle perf events") the
> perf_sample_event_took() function was added to report time spent in
> overflow interrupts. If the interrupt takes too long, the perf framework
> will lower the sysctl_perf_event_sample_rate and max_samples_per_tick.
> When hwc->interrupts is larger than max_samples_per_tick, the
> hwc->interrupts will be set to MAX_INTERRUPTS, and events will be
> throttled within the __perf_event_account_interrupt() function.
> 
> [...]

Applied, thanks!

[1/1] perf: RISC-V: Remove PERF_HES_STOPPED flag checking in riscv_pmu_start()
      https://git.kernel.org/palmer/c/66843b14fb71

Best regards,
-- 
Palmer Dabbelt <palmer@...osinc.com>