From patchwork Wed Dec 20 23:17:53 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lukasz Luba X-Patchwork-Id: 13500784 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 597DB4A9BB; Wed, 20 Dec 2023 23:17:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 0F712152B; Wed, 20 Dec 2023 15:17:52 -0800 (PST) Received: from e129166.arm.com (unknown [10.57.82.217]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id D54F43F64C; Wed, 20 Dec 2023 15:17:05 -0800 (PST) From: Lukasz Luba To: linux-kernel@vger.kernel.org, rafael@kernel.org Cc: linux-pm@vger.kernel.org, daniel.lezcano@linaro.org, rui.zhang@intel.com, lukasz.luba@arm.com Subject: [PATCH v3 9/9] thermal: gov_power_allocator: Support new update callback of weights Date: Wed, 20 Dec 2023 23:17:53 +0000 Message-Id: <20231220231753.1824364-10-lukasz.luba@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20231220231753.1824364-1-lukasz.luba@arm.com> References: <20231220231753.1824364-1-lukasz.luba@arm.com> Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 When the thermal instance's weight is updated from the sysfs the governor update_tz() callback is triggered. Implement proper reaction to this event in the IPA, which would save CPU cycles spent in throttle(). This will speed-up the main throttle() IPA function and clean it up a bit. Signed-off-by: Lukasz Luba --- drivers/thermal/gov_power_allocator.c | 15 +++++++++------ 1 file changed, 9 insertions(+), 6 deletions(-) diff --git a/drivers/thermal/gov_power_allocator.c b/drivers/thermal/gov_power_allocator.c index b5ec60ae7efd..7b6aa265ff6a 100644 --- a/drivers/thermal/gov_power_allocator.c +++ b/drivers/thermal/gov_power_allocator.c @@ -77,6 +77,7 @@ struct power_actor { * @trip_switch_on should be NULL. * @trip_max: last passive trip point of the thermal zone. The * temperature we are controlling for. + * @total_weight: Sum of all thermal instances weights * @num_actors: number of cooling devices supporting IPA callbacks * @buffer_size: internal buffer size, to avoid runtime re-calculation * @power: buffer for all power actors internal power information @@ -88,6 +89,7 @@ struct power_allocator_params { u32 sustainable_power; const struct thermal_trip *trip_switch_on; const struct thermal_trip *trip_max; + int total_weight; unsigned int num_actors; unsigned int buffer_size; struct power_actor *power; @@ -405,16 +407,11 @@ static int allocate_power(struct thermal_zone_device *tz, int control_temp) u32 total_granted_power = 0; u32 total_req_power = 0; u32 power_range, weight; - int total_weight = 0; int i = 0, ret; if (!num_actors) return -ENODEV; - list_for_each_entry(instance, &tz->thermal_instances, tz_node) - if (power_actor_is_valid(params, instance)) - total_weight += instance->weight; - /* Clean all buffers for new power estimations */ memset(power, 0, params->buffer_size); @@ -430,7 +427,7 @@ static int allocate_power(struct thermal_zone_device *tz, int control_temp) if (ret) continue; - if (!total_weight) + if (!params->total_weight) weight = 1 << FRAC_BITS; else weight = instance->weight; @@ -651,6 +648,12 @@ static void power_allocator_update_tz(struct thermal_zone_device *tz, allocate_actors_buffer(params, num_actors); break; + case THERMAL_INSTANCE_WEIGHT_CHANGED: + params->total_weight = 0; + list_for_each_entry(instance, &tz->thermal_instances, tz_node) + if (power_actor_is_valid(params, instance)) + params->total_weight += instance->weight; + break; default: break; }