diff options
| author | Sergey Matyukevich <sergey.matyukevich@syntacore.com> | 2022-08-30 18:53:06 +0300 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2022-09-08 13:34:58 -0700 |
| commit | 096b52fd2bb4996fd68d22b3b7ad21a1296db9d3 (patch) | |
| tree | d0628c73848c5c1f5d279baab349358985f4a0cc /drivers | |
| parent | 1537bf26e212ffcf007d0590958025f6bfdd4ac8 (diff) | |
| download | linux-096b52fd2bb4996fd68d22b3b7ad21a1296db9d3.tar.bz2 | |
perf: RISC-V: throttle perf events
Call perf_sample_event_took() to report time spent in overflow
interrupts. Perf core uses these measurements to throttle
perf events properly.
Signed-off-by: Sergey Matyukevich <sergey.matyukevich@syntacore.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Link: https://lore.kernel.org/r/20220830155306.301714-4-geomatsi@gmail.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/perf/riscv_pmu_sbi.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/perf/riscv_pmu_sbi.c b/drivers/perf/riscv_pmu_sbi.c index 1d05aff88c58..3e8179359933 100644 --- a/drivers/perf/riscv_pmu_sbi.c +++ b/drivers/perf/riscv_pmu_sbi.c @@ -18,6 +18,7 @@ #include <linux/of_irq.h> #include <linux/of.h> #include <linux/cpu_pm.h> +#include <linux/sched/clock.h> #include <asm/sbi.h> #include <asm/hwcap.h> @@ -570,6 +571,7 @@ static irqreturn_t pmu_sbi_ovf_handler(int irq, void *dev) unsigned long overflow; unsigned long overflowed_ctrs = 0; struct cpu_hw_events *cpu_hw_evt = dev; + u64 start_clock = sched_clock(); if (WARN_ON_ONCE(!cpu_hw_evt)) return IRQ_NONE; @@ -638,7 +640,9 @@ static irqreturn_t pmu_sbi_ovf_handler(int irq, void *dev) perf_event_overflow(event, &data, regs); } } + pmu_sbi_start_overflow_mask(pmu, overflowed_ctrs); + perf_sample_event_took(sched_clock() - start_clock); return IRQ_HANDLED; } |