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