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/**
* Copyright (C) ARM Limited 2010-2016. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#define __STDC_FORMAT_MACROS
#include "UserSpaceSource.h"
#include <inttypes.h>
#include <sys/prctl.h>
#include <unistd.h>
#include "Child.h"
#include "DriverSource.h"
#include "Logging.h"
#include "SessionData.h"
extern Child *child;
UserSpaceSource::UserSpaceSource(sem_t *senderSem) : mBuffer(0, FRAME_BLOCK_COUNTER, gSessionData.mTotalBufferSize*1024*1024, senderSem) {
}
UserSpaceSource::~UserSpaceSource() {
}
bool UserSpaceSource::prepare() {
return true;
}
void UserSpaceSource::run() {
prctl(PR_SET_NAME, (unsigned long)&"gatord-counters", 0, 0, 0);
for (int i = 0; i < ARRAY_LENGTH(gSessionData.mUsDrivers); ++i) {
gSessionData.mUsDrivers[i]->start();
}
int64_t monotonicStarted = 0;
while (monotonicStarted <= 0 && gSessionData.mSessionIsActive) {
usleep(10);
if (gSessionData.mPerf.isSetup()) {
monotonicStarted = gSessionData.mMonotonicStarted;
} else {
if (DriverSource::readInt64Driver("/dev/gator/started", &monotonicStarted) == -1) {
logg.logError("Error reading gator driver start time");
handleException();
}
gSessionData.mMonotonicStarted = monotonicStarted;
}
}
uint64_t nextTime = 0;
while (gSessionData.mSessionIsActive) {
const uint64_t currTime = getTime() - monotonicStarted;
// Sample ten times a second ignoring gSessionData.mSampleRate
nextTime += NS_PER_S/10;//gSessionData.mSampleRate;
if (nextTime < currTime) {
logg.logMessage("Too slow, currTime: %" PRIi64 " nextTime: %" PRIi64, currTime, nextTime);
nextTime = currTime;
}
if (mBuffer.eventHeader(currTime)) {
for (int i = 0; i < ARRAY_LENGTH(gSessionData.mUsDrivers); ++i) {
gSessionData.mUsDrivers[i]->read(&mBuffer);
}
// Only check after writing all counters so that time and corresponding counters appear in the same frame
mBuffer.check(currTime);
}
if (gSessionData.mOneShot && gSessionData.mSessionIsActive && (mBuffer.bytesAvailable() <= 0)) {
logg.logMessage("One shot (counters)");
child->endSession();
}
usleep((nextTime - currTime)/NS_PER_US);
}
mBuffer.setDone();
}
void UserSpaceSource::interrupt() {
// Do nothing
}
bool UserSpaceSource::isDone() {
return mBuffer.isDone();
}
void UserSpaceSource::write(Sender *sender) {
if (!mBuffer.isDone()) {
mBuffer.write(sender);
}
}
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