From: Peter Zijlstra <peterz@infradead.org>
To: Stephane Eranian <eranian@google.com>
Cc: linux-kernel@vger.kernel.org, acme@redhat.com, jolsa@redhat.com,
kim.phillips@amd.com, namhyung@kernel.org, irogers@google.com
Subject: Re: [PATCH v1 08/13] perf/x86/core: add idle hooks
Date: Thu, 9 Sep 2021 11:16:25 +0200 [thread overview]
Message-ID: <YTnQ6Wxoz8LYmtPS@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <20210909075700.4025355-9-eranian@google.com>
On Thu, Sep 09, 2021 at 12:56:55AM -0700, Stephane Eranian wrote:
> diff --git a/kernel/sched/idle.c b/kernel/sched/idle.c
> index 14ce130aee1b..c0ddc3c32a33 100644
> --- a/kernel/sched/idle.c
> +++ b/kernel/sched/idle.c
> @@ -179,7 +179,6 @@ static void cpuidle_idle_call(void)
> */
> if (need_resched()) {
> local_irq_enable();
> - perf_lopwr_cb(false);
> return;
> }
>
> @@ -230,6 +229,9 @@ static void cpuidle_idle_call(void)
> tick_nohz_idle_stop_tick();
>
> next_state = cpuidle_find_deepest_state(drv, dev, max_latency_ns);
> + if (!cpu_idle_force_poll)
> + perf_lopwr_cb(true);
> +
> call_cpuidle(drv, dev, next_state);
> } else {
> bool stop_tick = true;
> @@ -244,12 +246,17 @@ static void cpuidle_idle_call(void)
> else
> tick_nohz_idle_retain_tick();
>
> + if (!cpu_idle_force_poll)
> + perf_lopwr_cb(true);
> +
> entered_state = call_cpuidle(drv, dev, next_state);
> /*
> * Give the governor an opportunity to reflect on the outcome
> */
> cpuidle_reflect(dev, entered_state);
> }
> + if (!cpu_idle_force_poll)
> + perf_lopwr_cb(false);
>
> exit_idle:
> __current_set_polling();
> @@ -259,7 +266,6 @@ static void cpuidle_idle_call(void)
> */
> if (WARN_ON_ONCE(irqs_disabled())) {
> local_irq_enable();
> - perf_lopwr_cb(false);
> }
> }
>
> @@ -293,8 +299,6 @@ static void do_idle(void)
> while (!need_resched()) {
> rmb();
>
> - perf_lopwr_cb(true);
> -
> local_irq_disable();
>
> if (cpu_is_offline(cpu)) {
Why are you sendimg me a patch that undoes most of what the previous
patch does? That's just bad form.
next prev parent reply other threads:[~2021-09-09 9:16 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-09 7:56 [PATCH v1 00/13] perf/x86/amd: Add AMD Fam19h Branch Sampling support Stephane Eranian
2021-09-09 7:56 ` [PATCH v1 01/13] perf/core: add union to struct perf_branch_entry Stephane Eranian
2021-09-09 19:03 ` Peter Zijlstra
2021-09-10 12:09 ` Michael Ellerman
2021-09-10 14:16 ` Michael Ellerman
2021-09-15 6:03 ` Stephane Eranian
2021-09-17 6:37 ` Madhavan Srinivasan
2021-09-17 6:48 ` Stephane Eranian
2021-09-17 7:05 ` Michael Ellerman
2021-09-17 7:39 ` Stephane Eranian
2021-09-17 12:38 ` Michael Ellerman
2021-09-17 16:42 ` Stephane Eranian
2021-09-19 10:27 ` Michael Ellerman
2021-09-09 7:56 ` [PATCH v1 02/13] x86/cpufeatures: add AMD Fam19h Branch Sampling feature Stephane Eranian
2021-09-09 7:56 ` [PATCH v1 03/13] perf/x86/amd: add AMD Fam19h Branch Sampling support Stephane Eranian
2021-09-09 10:44 ` kernel test robot
2021-09-09 10:44 ` kernel test robot
2021-09-09 15:33 ` kernel test robot
2021-09-09 15:33 ` kernel test robot
2021-09-09 7:56 ` [PATCH v1 04/13] perf/x86/amd: add branch-brs helper event for Fam19h BRS Stephane Eranian
2021-09-09 7:56 ` [PATCH v1 05/13] perf/x86/amd: enable branch sampling priv level filtering Stephane Eranian
2021-09-09 7:56 ` [PATCH v1 06/13] perf/x86/amd: add AMD branch sampling period adjustment Stephane Eranian
2021-09-09 7:56 ` [PATCH v1 07/13] perf/core: add idle hooks Stephane Eranian
2021-09-09 9:15 ` Peter Zijlstra
2021-09-09 10:42 ` kernel test robot
2021-09-09 10:42 ` kernel test robot
2021-09-09 11:02 ` kernel test robot
2021-09-09 11:02 ` kernel test robot
2021-09-09 7:56 ` [PATCH v1 08/13] perf/x86/core: " Stephane Eranian
2021-09-09 9:16 ` Peter Zijlstra [this message]
2021-09-09 7:56 ` [PATCH v1 09/13] perf/x86/amd: add idle hooks for branch sampling Stephane Eranian
2021-09-09 9:20 ` Peter Zijlstra
2021-09-09 7:56 ` [PATCH v1 10/13] perf tools: add branch-brs as a new event Stephane Eranian
2021-09-09 7:56 ` [PATCH v1 11/13] perf tools: improve IBS error handling Stephane Eranian
2021-09-13 19:34 ` Arnaldo Carvalho de Melo
2021-10-04 21:57 ` Kim Phillips
2021-10-04 23:44 ` Arnaldo Carvalho de Melo
2021-09-09 7:56 ` [PATCH v1 12/13] perf tools: improve error handling of AMD Branch Sampling Stephane Eranian
2021-10-04 21:57 ` Kim Phillips
2021-09-09 7:57 ` [PATCH v1 13/13] perf report: add addr_from/addr_to sort dimensions Stephane Eranian
2021-09-09 8:55 ` [PATCH v1 00/13] perf/x86/amd: Add AMD Fam19h Branch Sampling support Peter Zijlstra
2021-09-15 5:55 ` Stephane Eranian
2021-09-15 9:04 ` Peter Zijlstra
2021-10-28 18:30 ` Stephane Eranian
2021-09-27 20:17 ` Song Liu
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