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/**
* Copyright (C) ARM Limited 2013-2014. 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.
*/
#include "MemInfoDriver.h"
#include "Logging.h"
#include "SessionData.h"
class MemInfoCounter : public DriverCounter {
public:
MemInfoCounter(DriverCounter *next, char *const name, int64_t *const value);
~MemInfoCounter();
int64_t read();
private:
int64_t *const mValue;
// Intentionally unimplemented
MemInfoCounter(const MemInfoCounter &);
MemInfoCounter &operator=(const MemInfoCounter &);
};
MemInfoCounter::MemInfoCounter(DriverCounter *next, char *const name, int64_t *const value) : DriverCounter(next, name), mValue(value) {
}
MemInfoCounter::~MemInfoCounter() {
}
int64_t MemInfoCounter::read() {
return *mValue;
}
MemInfoDriver::MemInfoDriver() : mBuf(), mMemUsed(0), mMemFree(0), mBuffers(0) {
}
MemInfoDriver::~MemInfoDriver() {
}
void MemInfoDriver::readEvents(mxml_node_t *const) {
// Only for use with perf
if (!gSessionData->perf.isSetup()) {
return;
}
setCounters(new MemInfoCounter(getCounters(), strdup("Linux_meminfo_memused2"), &mMemUsed));
setCounters(new MemInfoCounter(getCounters(), strdup("Linux_meminfo_memfree"), &mMemFree));
setCounters(new MemInfoCounter(getCounters(), strdup("Linux_meminfo_bufferram"), &mBuffers));
}
void MemInfoDriver::read(Buffer *const buffer) {
if (!countersEnabled()) {
return;
}
if (!mBuf.read("/proc/meminfo")) {
logg->logError(__FILE__, __LINE__, "Failed to read /proc/meminfo");
handleException();
}
char *key = mBuf.getBuf();
char *colon;
int64_t memTotal = 0;
while ((colon = strchr(key, ':')) != NULL) {
char *end = strchr(colon + 1, '\n');
if (end != NULL) {
*end = '\0';
}
*colon = '\0';
if (strcmp(key, "MemTotal") == 0) {
memTotal = strtoll(colon + 1, NULL, 10) << 10;
} else if (strcmp(key, "MemFree") == 0) {
mMemFree = strtoll(colon + 1, NULL, 10) << 10;
} else if (strcmp(key, "Buffers") == 0) {
mBuffers = strtoll(colon + 1, NULL, 10) << 10;
}
if (end == NULL) {
break;
}
key = end + 1;
}
mMemUsed = memTotal - mMemFree;
super::read(buffer);
}
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