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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.
*/
#ifndef PERF_GROUP
#define PERF_GROUP
// Use a snapshot of perf_event.h as it may be more recent than what is on the target and if not newer features won't be supported anyways
#include "k/perf_event.h"
#include "Config.h"
class Buffer;
class Monitor;
class PerfBuffer;
enum PerfGroupFlags {
PERF_GROUP_MMAP = 1 << 0,
PERF_GROUP_COMM = 1 << 1,
PERF_GROUP_FREQ = 1 << 2,
PERF_GROUP_TASK = 1 << 3,
PERF_GROUP_SAMPLE_ID_ALL = 1 << 4,
};
class PerfGroup {
public:
PerfGroup(PerfBuffer *const pb);
~PerfGroup();
bool add(Buffer *const buffer, const int key, const __u32 type, const __u64 config, const __u64 sample, const __u64 sampleType, const int flags);
// Safe to call concurrently
bool prepareCPU(const int cpu);
// Not safe to call concurrently. Returns the number of events enabled
int onlineCPU(const int cpu, const bool start, Buffer *const buffer, Monitor *const monitor);
bool offlineCPU(int cpu);
bool start();
void stop();
private:
// +1 for the group leader
struct perf_event_attr mAttrs[MAX_PERFORMANCE_COUNTERS + 1];
int mKeys[MAX_PERFORMANCE_COUNTERS + 1];
int mFds[NR_CPUS * (MAX_PERFORMANCE_COUNTERS + 1)];
PerfBuffer *const mPb;
// Intentionally undefined
PerfGroup(const PerfGroup &);
PerfGroup &operator=(const PerfGroup &);
};
#endif // PERF_GROUP
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