95 lines
2.4 KiB
C++
95 lines
2.4 KiB
C++
/**
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* Copyright (C) ARM Limited 2010-2014. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include "UserSpaceSource.h"
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#include <sys/prctl.h>
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#include <unistd.h>
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#include "Child.h"
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#include "DriverSource.h"
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#include "Logging.h"
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#include "SessionData.h"
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extern Child *child;
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UserSpaceSource::UserSpaceSource(sem_t *senderSem) : mBuffer(0, FRAME_BLOCK_COUNTER, gSessionData->mTotalBufferSize*1024*1024, senderSem) {
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}
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UserSpaceSource::~UserSpaceSource() {
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}
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bool UserSpaceSource::prepare() {
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return true;
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}
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void UserSpaceSource::run() {
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prctl(PR_SET_NAME, (unsigned long)&"gatord-counters", 0, 0, 0);
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for (int i = 0; i < ARRAY_LENGTH(gSessionData->usDrivers); ++i) {
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gSessionData->usDrivers[i]->start();
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}
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int64_t monotonic_started = 0;
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while (monotonic_started <= 0) {
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usleep(10);
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if (gSessionData->perf.isSetup()) {
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monotonic_started = gSessionData->mMonotonicStarted;
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} else {
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if (DriverSource::readInt64Driver("/dev/gator/started", &monotonic_started) == -1) {
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logg->logError(__FILE__, __LINE__, "Error reading gator driver start time");
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handleException();
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}
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gSessionData->mMonotonicStarted = monotonic_started;
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}
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}
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uint64_t next_time = 0;
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while (gSessionData->mSessionIsActive) {
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const uint64_t curr_time = getTime() - monotonic_started;
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// Sample ten times a second ignoring gSessionData->mSampleRate
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next_time += NS_PER_S/10;//gSessionData->mSampleRate;
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if (next_time < curr_time) {
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logg->logMessage("Too slow, curr_time: %lli next_time: %lli", curr_time, next_time);
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next_time = curr_time;
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}
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if (mBuffer.eventHeader(curr_time)) {
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for (int i = 0; i < ARRAY_LENGTH(gSessionData->usDrivers); ++i) {
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gSessionData->usDrivers[i]->read(&mBuffer);
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}
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// Only check after writing all counters so that time and corresponding counters appear in the same frame
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mBuffer.check(curr_time);
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}
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if (mBuffer.bytesAvailable() <= 0) {
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logg->logMessage("One shot (counters)");
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child->endSession();
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}
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usleep((next_time - curr_time)/NS_PER_US);
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}
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mBuffer.setDone();
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}
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void UserSpaceSource::interrupt() {
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// Do nothing
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}
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bool UserSpaceSource::isDone() {
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return mBuffer.isDone();
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}
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void UserSpaceSource::write(Sender *sender) {
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if (!mBuffer.isDone()) {
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mBuffer.write(sender);
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}
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}
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