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/**
* Copyright (C) ARM Limited 2013-2016. 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.
*/
#ifndef PERF_GROUP
#define PERF_GROUP
#include <stdint.h>
// 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 GatorCpu;
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,
PERF_GROUP_PER_CPU = 1 << 5,
PERF_GROUP_LEADER = 1 << 6,
PERF_GROUP_CPU = 1 << 7,
PERF_GROUP_ALL_CLUSTERS = 1 << 8,
};
enum {
PG_SUCCESS = 0,
PG_FAILURE,
PG_CPU_OFFLINE,
};
class PerfGroup {
public:
PerfGroup(PerfBuffer *const pb);
~PerfGroup();
bool createCpuGroup(const uint64_t currTime, Buffer *const buffer);
bool add(const uint64_t currTime, Buffer *const buffer, const int key, const __u32 type, const __u64 config, const __u64 sample, const __u64 sampleType, const int flags, const GatorCpu *const cluster);
// Safe to call concurrently
int prepareCPU(const int cpu, Monitor *const monitor);
// Not safe to call concurrently. Returns the number of events enabled
int onlineCPU(const uint64_t currTime, const int cpu, const bool enable, Buffer *const buffer);
bool offlineCPU(int cpu);
void start();
void stop();
private:
int getEffectiveType(const int type, const int flags);
int doAdd(const uint64_t currTime, Buffer *const buffer, const int key, const __u32 type, const __u64 config, const __u64 sample, const __u64 sampleType, const int flags, const GatorCpu *const cluster);
// 2* to be conservative for sched_switch, cpu_idle, hrtimer and non-CPU groups
struct perf_event_attr mAttrs[2*MAX_PERFORMANCE_COUNTERS];
PerfBuffer *const mPb;
const GatorCpu *mClusters[2*MAX_PERFORMANCE_COUNTERS];
int mFlags[2*MAX_PERFORMANCE_COUNTERS];
int mKeys[2*MAX_PERFORMANCE_COUNTERS];
int mFds[NR_CPUS * (2*MAX_PERFORMANCE_COUNTERS)];
// Offset in mAttrs, mFlags, mClusters and mKeys of the group leaders for each perf type
int mLeaders[16];
int mSchedSwitchId;
// Intentionally undefined
PerfGroup(const PerfGroup &);
PerfGroup &operator=(const PerfGroup &);
};
#endif // PERF_GROUP
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