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- // Copyright 2021 The Chromium Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style license that can be
- // found in the LICENSE file.
- #include "components/power_metrics/resource_coalition_mac.h"
- #include <libproc.h>
- #include "base/check_op.h"
- #include "components/power_metrics/energy_impact_mac.h"
- #include "components/power_metrics/mach_time_mac.h"
- extern "C" int coalition_info_resource_usage(
- uint64_t cid,
- struct coalition_resource_usage* cru,
- size_t sz);
- namespace power_metrics {
- absl::optional<uint64_t> GetProcessCoalitionId(base::ProcessId pid) {
- proc_pidcoalitioninfo coalition_info = {};
- int res = proc_pidinfo(pid, PROC_PIDCOALITIONINFO, 0, &coalition_info,
- sizeof(coalition_info));
- if (res != sizeof(coalition_info))
- return absl::nullopt;
- return coalition_info.coalition_id[COALITION_TYPE_RESOURCE];
- }
- std::unique_ptr<coalition_resource_usage> GetCoalitionResourceUsage(
- int64_t coalition_id) {
- auto cru = std::make_unique<coalition_resource_usage>();
- uint64_t res = coalition_info_resource_usage(
- coalition_id, cru.get(), sizeof(coalition_resource_usage));
- if (res == 0U)
- return cru;
- return nullptr;
- }
- coalition_resource_usage GetCoalitionResourceUsageDifference(
- const coalition_resource_usage& left,
- const coalition_resource_usage& right) {
- DCHECK_GE(left.tasks_started, right.tasks_started);
- DCHECK_GE(left.tasks_exited, right.tasks_exited);
- DCHECK_GE(left.time_nonempty, right.time_nonempty);
- DCHECK_GE(left.cpu_time, right.cpu_time);
- DCHECK_GE(left.interrupt_wakeups, right.interrupt_wakeups);
- DCHECK_GE(left.platform_idle_wakeups, right.platform_idle_wakeups);
- DCHECK_GE(left.bytesread, right.bytesread);
- DCHECK_GE(left.byteswritten, right.byteswritten);
- DCHECK_GE(left.gpu_time, right.gpu_time);
- DCHECK_GE(left.cpu_time_billed_to_me, right.cpu_time_billed_to_me);
- DCHECK_GE(left.cpu_time_billed_to_others, right.cpu_time_billed_to_others);
- DCHECK_GE(left.energy, right.energy);
- DCHECK_GE(left.logical_immediate_writes, right.logical_immediate_writes);
- DCHECK_GE(left.logical_deferred_writes, right.logical_deferred_writes);
- DCHECK_GE(left.logical_invalidated_writes, right.logical_invalidated_writes);
- DCHECK_GE(left.logical_metadata_writes, right.logical_metadata_writes);
- DCHECK_GE(left.logical_immediate_writes_to_external,
- right.logical_immediate_writes_to_external);
- DCHECK_GE(left.logical_deferred_writes_to_external,
- right.logical_deferred_writes_to_external);
- DCHECK_GE(left.logical_invalidated_writes_to_external,
- right.logical_invalidated_writes_to_external);
- DCHECK_GE(left.logical_metadata_writes_to_external,
- right.logical_metadata_writes_to_external);
- DCHECK_GE(left.energy_billed_to_me, right.energy_billed_to_me);
- DCHECK_GE(left.energy_billed_to_others, right.energy_billed_to_others);
- DCHECK_GE(left.cpu_ptime, right.cpu_ptime);
- DCHECK_GE(left.cpu_instructions, right.cpu_instructions);
- DCHECK_GE(left.cpu_cycles, right.cpu_cycles);
- DCHECK_GE(left.fs_metadata_writes, right.fs_metadata_writes);
- DCHECK_GE(left.pm_writes, right.pm_writes);
- coalition_resource_usage ret;
- ret.tasks_started = left.tasks_started - right.tasks_started;
- ret.tasks_exited = left.tasks_exited - right.tasks_exited;
- ret.time_nonempty = left.time_nonempty - right.time_nonempty;
- ret.cpu_time = left.cpu_time - right.cpu_time;
- ret.interrupt_wakeups = left.interrupt_wakeups - right.interrupt_wakeups;
- ret.platform_idle_wakeups =
- left.platform_idle_wakeups - right.platform_idle_wakeups;
- ret.bytesread = left.bytesread - right.bytesread;
- ret.byteswritten = left.byteswritten - right.byteswritten;
- ret.gpu_time = left.gpu_time - right.gpu_time;
- ret.cpu_time_billed_to_me =
- left.cpu_time_billed_to_me - right.cpu_time_billed_to_me;
- ret.cpu_time_billed_to_others =
- left.cpu_time_billed_to_others - right.cpu_time_billed_to_others;
- ret.energy = left.energy - right.energy;
- ret.logical_immediate_writes =
- left.logical_immediate_writes - right.logical_immediate_writes;
- ret.logical_deferred_writes =
- left.logical_deferred_writes - right.logical_deferred_writes;
- ret.logical_invalidated_writes =
- left.logical_invalidated_writes - right.logical_invalidated_writes;
- ret.logical_metadata_writes =
- left.logical_metadata_writes - right.logical_metadata_writes;
- ret.logical_immediate_writes_to_external =
- left.logical_immediate_writes_to_external -
- right.logical_immediate_writes_to_external;
- ret.logical_deferred_writes_to_external =
- left.logical_deferred_writes_to_external -
- right.logical_deferred_writes_to_external;
- ret.logical_invalidated_writes_to_external =
- left.logical_invalidated_writes_to_external -
- right.logical_invalidated_writes_to_external;
- ret.logical_metadata_writes_to_external =
- left.logical_metadata_writes_to_external -
- right.logical_metadata_writes_to_external;
- ret.energy_billed_to_me =
- left.energy_billed_to_me - right.energy_billed_to_me;
- ret.energy_billed_to_others =
- left.energy_billed_to_others - right.energy_billed_to_others;
- ret.cpu_ptime = left.cpu_ptime - right.cpu_ptime;
- DCHECK_EQ(left.cpu_time_eqos_len,
- static_cast<uint64_t>(COALITION_NUM_THREAD_QOS_TYPES));
- DCHECK_EQ(right.cpu_time_eqos_len,
- static_cast<uint64_t>(COALITION_NUM_THREAD_QOS_TYPES));
- ret.cpu_time_eqos_len = left.cpu_time_eqos_len;
- for (int i = 0; i < COALITION_NUM_THREAD_QOS_TYPES; ++i) {
- DCHECK_GE(left.cpu_time_eqos[i], right.cpu_time_eqos[i]);
- ret.cpu_time_eqos[i] = left.cpu_time_eqos[i] - right.cpu_time_eqos[i];
- }
- ret.cpu_instructions = left.cpu_instructions - right.cpu_instructions;
- ret.cpu_cycles = left.cpu_cycles - right.cpu_cycles;
- ret.fs_metadata_writes = left.fs_metadata_writes - right.fs_metadata_writes;
- ret.pm_writes = left.pm_writes - right.pm_writes;
- return ret;
- }
- absl::optional<CoalitionResourceUsageRate> GetCoalitionResourceUsageRate(
- const coalition_resource_usage& begin,
- const coalition_resource_usage& end,
- base::TimeDelta interval_duration,
- mach_timebase_info_data_t timebase,
- absl::optional<EnergyImpactCoefficients> energy_impact_coefficients) {
- // Validate that |end| >= |begin|.
- bool end_greater_or_equal_begin =
- std::tie(end.cpu_time, end.interrupt_wakeups, end.platform_idle_wakeups,
- end.bytesread, end.byteswritten, end.gpu_time, end.energy) >=
- std::tie(begin.cpu_time, begin.interrupt_wakeups,
- begin.platform_idle_wakeups, begin.bytesread, begin.byteswritten,
- begin.gpu_time, begin.energy);
- for (int i = 0; i < COALITION_NUM_THREAD_QOS_TYPES; ++i) {
- if (end.cpu_time_eqos[i] < begin.cpu_time_eqos[i])
- end_greater_or_equal_begin = false;
- }
- if (!end_greater_or_equal_begin)
- return absl::nullopt;
- auto get_rate_per_second = [&interval_duration](uint64_t begin,
- uint64_t end) -> double {
- DCHECK_GE(end, begin);
- uint64_t diff = end - begin;
- return diff / interval_duration.InSecondsF();
- };
- auto get_time_rate_per_second = [&interval_duration, &timebase](
- uint64_t begin, uint64_t end) -> double {
- DCHECK_GE(end, begin);
- // Compute the delta in s, being careful to avoid truncation due to integral
- // division.
- double delta_sample_s =
- power_metrics::MachTimeToNs(end - begin, timebase) /
- static_cast<double>(base::Time::kNanosecondsPerSecond);
- return delta_sample_s / interval_duration.InSecondsF();
- };
- CoalitionResourceUsageRate result;
- result.cpu_time_per_second =
- get_time_rate_per_second(begin.cpu_time, end.cpu_time);
- result.interrupt_wakeups_per_second =
- get_rate_per_second(begin.interrupt_wakeups, end.interrupt_wakeups);
- result.platform_idle_wakeups_per_second = get_rate_per_second(
- begin.platform_idle_wakeups, end.platform_idle_wakeups);
- result.bytesread_per_second =
- get_rate_per_second(begin.bytesread, end.bytesread);
- result.byteswritten_per_second =
- get_rate_per_second(begin.byteswritten, end.byteswritten);
- result.gpu_time_per_second =
- get_time_rate_per_second(begin.gpu_time, end.gpu_time);
- result.power_nw = get_rate_per_second(begin.energy, end.energy);
- for (int i = 0; i < COALITION_NUM_THREAD_QOS_TYPES; ++i) {
- result.qos_time_per_second[i] =
- get_time_rate_per_second(begin.cpu_time_eqos[i], end.cpu_time_eqos[i]);
- }
- if (energy_impact_coefficients.has_value()) {
- result.energy_impact_per_second =
- (ComputeEnergyImpactForResourceUsage(
- end, energy_impact_coefficients.value(), timebase) -
- ComputeEnergyImpactForResourceUsage(
- begin, energy_impact_coefficients.value(), timebase)) /
- interval_duration.InSecondsF();
- }
- return result;
- }
- } // power_metrics
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