2 * Copyright (C) ARM Limited 2010-2014. All rights reserved.
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
9 #include "UserSpaceSource.h"
11 #include <sys/prctl.h>
15 #include "DriverSource.h"
17 #include "SessionData.h"
19 #define NS_PER_S ((uint64_t)1000000000)
20 #define NS_PER_US 1000
24 UserSpaceSource::UserSpaceSource(sem_t *senderSem) : mBuffer(0, FRAME_BLOCK_COUNTER, gSessionData->mTotalBufferSize*1024*1024, senderSem) {
27 UserSpaceSource::~UserSpaceSource() {
30 bool UserSpaceSource::prepare() {
34 void UserSpaceSource::run() {
35 prctl(PR_SET_NAME, (unsigned long)&"gatord-counters", 0, 0, 0);
37 gSessionData->hwmon.start();
39 int64_t monotonic_started = 0;
40 while (monotonic_started <= 0) {
43 if (DriverSource::readInt64Driver("/dev/gator/started", &monotonic_started) == -1) {
44 logg->logError(__FILE__, __LINE__, "Error reading gator driver start time");
49 uint64_t next_time = 0;
50 while (gSessionData->mSessionIsActive) {
52 #ifndef CLOCK_MONOTONIC_RAW
53 // Android doesn't have this defined but it was added in Linux 2.6.28
54 #define CLOCK_MONOTONIC_RAW 4
56 if (clock_gettime(CLOCK_MONOTONIC_RAW, &ts) != 0) {
57 logg->logError(__FILE__, __LINE__, "Failed to get uptime");
60 const uint64_t curr_time = (NS_PER_S*ts.tv_sec + ts.tv_nsec) - monotonic_started;
61 // Sample ten times a second ignoring gSessionData->mSampleRate
62 next_time += NS_PER_S/10;//gSessionData->mSampleRate;
63 if (next_time < curr_time) {
64 logg->logMessage("Too slow, curr_time: %lli next_time: %lli", curr_time, next_time);
65 next_time = curr_time;
68 if (mBuffer.eventHeader(curr_time)) {
69 gSessionData->hwmon.read(&mBuffer);
70 // Only check after writing all counters so that time and corresponding counters appear in the same frame
71 mBuffer.check(curr_time);
74 if (mBuffer.bytesAvailable() <= 0) {
75 logg->logMessage("One shot (counters)");
79 usleep((next_time - curr_time)/NS_PER_US);
85 void UserSpaceSource::interrupt() {
89 bool UserSpaceSource::isDone() {
90 return mBuffer.isDone();
93 void UserSpaceSource::write(Sender *sender) {
94 if (!mBuffer.isDone()) {
95 mBuffer.write(sender);