// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifdef UNSAFE_BUFFERS_BUILD
// TODO(crbug.com/40285824): Remove this and convert code to safer constructs.
#pragma allow_unsafe_buffers
#endif
#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 {
std::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 std::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) {
if (right.cpu_time_eqos[i] > left.cpu_time_eqos[i]) {
// TODO(fdoray): Investigate why this happens. In the meantime, pretend
// that there was no CPU time at this QoS.
ret.cpu_time_eqos[i] = 0;
} else {
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;
}
std::optional<CoalitionResourceUsageRate> GetCoalitionResourceUsageRate(
const coalition_resource_usage& begin,
const coalition_resource_usage& end,
base::TimeDelta interval_duration,
mach_timebase_info_data_t timebase,
std::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 std::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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