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-rw-r--r--libs/cpustats/ThreadCpuUsage.cpp252
1 files changed, 0 insertions, 252 deletions
diff --git a/libs/cpustats/ThreadCpuUsage.cpp b/libs/cpustats/ThreadCpuUsage.cpp
deleted file mode 100644
index 99b4c83..0000000
--- a/libs/cpustats/ThreadCpuUsage.cpp
+++ /dev/null
@@ -1,252 +0,0 @@
-/*
- * Copyright (C) 2011 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#define LOG_TAG "ThreadCpuUsage"
-//#define LOG_NDEBUG 0
-
-#include <errno.h>
-#include <stdlib.h>
-#include <time.h>
-
-#include <utils/Debug.h>
-#include <utils/Log.h>
-
-#include <cpustats/ThreadCpuUsage.h>
-
-namespace android {
-
-bool ThreadCpuUsage::setEnabled(bool isEnabled)
-{
- bool wasEnabled = mIsEnabled;
- // only do something if there is a change
- if (isEnabled != wasEnabled) {
- ALOGV("setEnabled(%d)", isEnabled);
- int rc;
- // enabling
- if (isEnabled) {
- rc = clock_gettime(CLOCK_THREAD_CPUTIME_ID, &mPreviousTs);
- if (rc) {
- ALOGE("clock_gettime(CLOCK_THREAD_CPUTIME_ID) errno=%d", errno);
- isEnabled = false;
- } else {
- mWasEverEnabled = true;
- // record wall clock time at first enable
- if (!mMonotonicKnown) {
- rc = clock_gettime(CLOCK_MONOTONIC, &mMonotonicTs);
- if (rc) {
- ALOGE("clock_gettime(CLOCK_MONOTONIC) errno=%d", errno);
- } else {
- mMonotonicKnown = true;
- }
- }
- }
- // disabling
- } else {
- struct timespec ts;
- rc = clock_gettime(CLOCK_THREAD_CPUTIME_ID, &ts);
- if (rc) {
- ALOGE("clock_gettime(CLOCK_THREAD_CPUTIME_ID) errno=%d", errno);
- } else {
- long long delta = (ts.tv_sec - mPreviousTs.tv_sec) * 1000000000LL +
- (ts.tv_nsec - mPreviousTs.tv_nsec);
- mAccumulator += delta;
-#if 0
- mPreviousTs = ts;
-#endif
- }
- }
- mIsEnabled = isEnabled;
- }
- return wasEnabled;
-}
-
-bool ThreadCpuUsage::sampleAndEnable(double& ns)
-{
- bool ret;
- bool wasEverEnabled = mWasEverEnabled;
- if (enable()) {
- // already enabled, so add a new sample relative to previous
- return sample(ns);
- } else if (wasEverEnabled) {
- // was disabled, but add sample for accumulated time while enabled
- ns = (double) mAccumulator;
- mAccumulator = 0;
- ALOGV("sampleAndEnable %.0f", ns);
- return true;
- } else {
- // first time called
- ns = 0.0;
- ALOGV("sampleAndEnable false");
- return false;
- }
-}
-
-bool ThreadCpuUsage::sample(double &ns)
-{
- if (mWasEverEnabled) {
- if (mIsEnabled) {
- struct timespec ts;
- int rc;
- rc = clock_gettime(CLOCK_THREAD_CPUTIME_ID, &ts);
- if (rc) {
- ALOGE("clock_gettime(CLOCK_THREAD_CPUTIME_ID) errno=%d", errno);
- ns = 0.0;
- return false;
- } else {
- long long delta = (ts.tv_sec - mPreviousTs.tv_sec) * 1000000000LL +
- (ts.tv_nsec - mPreviousTs.tv_nsec);
- mAccumulator += delta;
- mPreviousTs = ts;
- }
- } else {
- mWasEverEnabled = false;
- }
- ns = (double) mAccumulator;
- ALOGV("sample %.0f", ns);
- mAccumulator = 0;
- return true;
- } else {
- ALOGW("Can't add sample because measurements have never been enabled");
- ns = 0.0;
- return false;
- }
-}
-
-long long ThreadCpuUsage::elapsed() const
-{
- long long elapsed;
- if (mMonotonicKnown) {
- struct timespec ts;
- int rc;
- rc = clock_gettime(CLOCK_MONOTONIC, &ts);
- if (rc) {
- ALOGE("clock_gettime(CLOCK_MONOTONIC) errno=%d", errno);
- elapsed = 0;
- } else {
- // mMonotonicTs is updated only at first enable and resetStatistics
- elapsed = (ts.tv_sec - mMonotonicTs.tv_sec) * 1000000000LL +
- (ts.tv_nsec - mMonotonicTs.tv_nsec);
- }
- } else {
- ALOGW("Can't compute elapsed time because measurements have never been enabled");
- elapsed = 0;
- }
- ALOGV("elapsed %lld", elapsed);
- return elapsed;
-}
-
-void ThreadCpuUsage::resetElapsed()
-{
- ALOGV("resetElapsed");
- if (mMonotonicKnown) {
- int rc;
- rc = clock_gettime(CLOCK_MONOTONIC, &mMonotonicTs);
- if (rc) {
- ALOGE("clock_gettime(CLOCK_MONOTONIC) errno=%d", errno);
- mMonotonicKnown = false;
- }
- }
-}
-
-/*static*/
-int ThreadCpuUsage::sScalingFds[ThreadCpuUsage::MAX_CPU];
-pthread_once_t ThreadCpuUsage::sOnceControl = PTHREAD_ONCE_INIT;
-int ThreadCpuUsage::sKernelMax;
-
-/*static*/
-void ThreadCpuUsage::init()
-{
- // read the number of CPUs
- sKernelMax = 1;
- int fd = open("/sys/devices/system/cpu/kernel_max", O_RDONLY);
- if (fd >= 0) {
-#define KERNEL_MAX_SIZE 12
- char kernelMax[KERNEL_MAX_SIZE];
- ssize_t actual = read(fd, kernelMax, sizeof(kernelMax));
- if (actual >= 2 && kernelMax[actual-1] == '\n') {
- sKernelMax = atoi(kernelMax);
- if (sKernelMax >= MAX_CPU - 1) {
- ALOGW("kernel_max %d but MAX_CPU %d", sKernelMax, MAX_CPU);
- sKernelMax = MAX_CPU;
- } else if (sKernelMax < 0) {
- ALOGW("kernel_max invalid %d", sKernelMax);
- sKernelMax = 1;
- } else {
- ++sKernelMax;
- ALOGV("number of CPUs %d", sKernelMax);
- }
- } else {
- ALOGW("Can't read number of CPUs");
- }
- (void) close(fd);
- } else {
- ALOGW("Can't open number of CPUs");
- }
-
- // open fd to each frequency per CPU
-#define FREQ_SIZE 64
- char freq_path[FREQ_SIZE];
-#define FREQ_DIGIT 27
- COMPILE_TIME_ASSERT_FUNCTION_SCOPE(MAX_CPU <= 10);
- strlcpy(freq_path, "/sys/devices/system/cpu/cpu?/cpufreq/scaling_cur_freq", sizeof(freq_path));
- int i;
- for (i = 0; i < MAX_CPU; ++i) {
- sScalingFds[i] = -1;
- }
- for (i = 0; i < sKernelMax; ++i) {
- freq_path[FREQ_DIGIT] = i + '0';
- fd = open(freq_path, O_RDONLY);
- if (fd >= 0) {
- // keep this fd until process exit
- sScalingFds[i] = fd;
- } else {
- ALOGW("Can't open CPU %d", i);
- }
- }
-}
-
-uint32_t ThreadCpuUsage::getCpukHz(int cpuNum)
-{
- if (cpuNum < 0 || cpuNum >= MAX_CPU) {
- ALOGW("getCpukHz called with invalid CPU %d", cpuNum);
- return 0;
- }
- int fd = sScalingFds[cpuNum];
- if (fd < 0) {
- ALOGW("getCpukHz called for unopened CPU %d", cpuNum);
- return 0;
- }
-#define KHZ_SIZE 12
- char kHz[KHZ_SIZE]; // kHz base 10
- ssize_t actual = pread(fd, kHz, sizeof(kHz), (off_t) 0);
- uint32_t ret;
- if (actual >= 2 && kHz[actual-1] == '\n') {
- ret = atoi(kHz);
- } else {
- ret = 0;
- }
- if (ret != mCurrentkHz[cpuNum]) {
- if (ret > 0) {
- ALOGV("CPU %d frequency %u kHz", cpuNum, ret);
- } else {
- ALOGW("Can't read CPU %d frequency", cpuNum);
- }
- mCurrentkHz[cpuNum] = ret;
- }
- return ret;
-}
-
-} // namespace android
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