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unix: add wrapper around perf_event_open on Linux
This adds a wrapper around perf_event_open, exported constants and two structs: - perf_event_attr, used to configure the syscall - perf_event_mmap_page to coordinate the kernel's mmap ring buffer Change-Id: Ife7ded8344de9e3eb74441bd51ab9a04c81b4965 Reviewed-on: https://go-review.googlesource.com/105756 Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com> Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org>
This commit is contained in:
Adam Sindelar
committed by
Tobias Klauser
Tobias Klauser
parent
2281fa97ef
commit
2f57af4873
@@ -231,6 +231,61 @@ struct my_epoll_event {
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int32_t pad;
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};
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// Copied from <linux/perf_event.h> with the following modifications:
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// 1) bit field after read_format redeclared as '__u64 bits' to make it
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// accessible from Go
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// 2) collapsed the unions, to avoid confusing godoc for the generated output
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// (e.g. having to use BpAddr as an extension of Config)
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struct perf_event_attr_go {
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__u32 type;
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__u32 size;
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__u64 config;
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// union {
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// __u64 sample_period;
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// __u64 sample_freq;
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// };
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__u64 sample;
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__u64 sample_type;
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__u64 read_format;
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// Replaces the bit field. Flags are defined as constants.
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__u64 bits;
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// union {
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// __u32 wakeup_events;
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// __u32 wakeup_watermark;
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// };
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__u32 wakeup;
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__u32 bp_type;
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// union {
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// __u64 bp_addr;
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// __u64 config1;
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// };
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__u64 ext1;
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// union {
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// __u64 bp_len;
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// __u64 config2;
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// };
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__u64 ext2;
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__u64 branch_sample_type;
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__u64 sample_regs_user;
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__u32 sample_stack_user;
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__s32 clockid;
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__u64 sample_regs_intr;
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__u32 aux_watermark;
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__u32 __reserved_2;
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};
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*/
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import "C"
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@@ -698,6 +753,138 @@ const (
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BDADDR_LE_RANDOM = C.BDADDR_LE_RANDOM
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)
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// Perf subsystem
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type PerfEventAttr C.struct_perf_event_attr_go
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type PerfEventMmapPage C.struct_perf_event_mmap_page
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// Bit field in struct perf_event_attr expanded as flags.
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// Set these on PerfEventAttr.Bits by ORing them together.
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const (
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PerfBitDisabled uint64 = CBitFieldMaskBit0
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PerfBitInherit = CBitFieldMaskBit1
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PerfBitPinned = CBitFieldMaskBit2
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PerfBitExclusive = CBitFieldMaskBit3
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PerfBitExcludeUser = CBitFieldMaskBit4
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PerfBitExcludeKernel = CBitFieldMaskBit5
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PerfBitExcludeHv = CBitFieldMaskBit6
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PerfBitExcludeIdle = CBitFieldMaskBit7
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PerfBitMmap = CBitFieldMaskBit8
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PerfBitComm = CBitFieldMaskBit9
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PerfBitFreq = CBitFieldMaskBit10
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PerfBitInheritStat = CBitFieldMaskBit11
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PerfBitEnableOnExec = CBitFieldMaskBit12
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PerfBitTask = CBitFieldMaskBit13
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PerfBitWatermark = CBitFieldMaskBit14
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PerfBitPreciseIPBit1 = CBitFieldMaskBit15
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PerfBitPreciseIPBit2 = CBitFieldMaskBit16
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PerfBitMmapData = CBitFieldMaskBit17
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PerfBitSampleIDAll = CBitFieldMaskBit18
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PerfBitExcludeHost = CBitFieldMaskBit19
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PerfBitExcludeGuest = CBitFieldMaskBit20
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PerfBitExcludeCallchainKernel = CBitFieldMaskBit21
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PerfBitExcludeCallchainUser = CBitFieldMaskBit22
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PerfBitMmap2 = CBitFieldMaskBit23
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PerfBitCommExec = CBitFieldMaskBit24
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PerfBitUseClockID = CBitFieldMaskBit25
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PerfBitContextSwitch = CBitFieldMaskBit26
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)
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const (
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PERF_TYPE_HARDWARE = C.PERF_TYPE_HARDWARE
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PERF_TYPE_SOFTWARE = C.PERF_TYPE_SOFTWARE
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PERF_TYPE_TRACEPOINT = C.PERF_TYPE_TRACEPOINT
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PERF_TYPE_HW_CACHE = C.PERF_TYPE_HW_CACHE
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PERF_TYPE_RAW = C.PERF_TYPE_RAW
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PERF_TYPE_BREAKPOINT = C.PERF_TYPE_BREAKPOINT
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PERF_COUNT_HW_CPU_CYCLES = C.PERF_COUNT_HW_CPU_CYCLES
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PERF_COUNT_HW_INSTRUCTIONS = C.PERF_COUNT_HW_INSTRUCTIONS
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PERF_COUNT_HW_CACHE_REFERENCES = C.PERF_COUNT_HW_CACHE_REFERENCES
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PERF_COUNT_HW_CACHE_MISSES = C.PERF_COUNT_HW_CACHE_MISSES
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PERF_COUNT_HW_BRANCH_INSTRUCTIONS = C.PERF_COUNT_HW_BRANCH_INSTRUCTIONS
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PERF_COUNT_HW_BRANCH_MISSES = C.PERF_COUNT_HW_BRANCH_MISSES
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PERF_COUNT_HW_BUS_CYCLES = C.PERF_COUNT_HW_BUS_CYCLES
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PERF_COUNT_HW_STALLED_CYCLES_FRONTEND = C.PERF_COUNT_HW_STALLED_CYCLES_FRONTEND
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PERF_COUNT_HW_STALLED_CYCLES_BACKEND = C.PERF_COUNT_HW_STALLED_CYCLES_BACKEND
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PERF_COUNT_HW_REF_CPU_CYCLES = C.PERF_COUNT_HW_REF_CPU_CYCLES
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PERF_COUNT_HW_CACHE_L1D = C.PERF_COUNT_HW_CACHE_L1D
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PERF_COUNT_HW_CACHE_L1I = C.PERF_COUNT_HW_CACHE_L1I
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PERF_COUNT_HW_CACHE_LL = C.PERF_COUNT_HW_CACHE_LL
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PERF_COUNT_HW_CACHE_DTLB = C.PERF_COUNT_HW_CACHE_DTLB
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PERF_COUNT_HW_CACHE_ITLB = C.PERF_COUNT_HW_CACHE_ITLB
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PERF_COUNT_HW_CACHE_BPU = C.PERF_COUNT_HW_CACHE_BPU
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PERF_COUNT_HW_CACHE_NODE = C.PERF_COUNT_HW_CACHE_NODE
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PERF_COUNT_HW_CACHE_OP_READ = C.PERF_COUNT_HW_CACHE_OP_READ
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PERF_COUNT_HW_CACHE_OP_WRITE = C.PERF_COUNT_HW_CACHE_OP_WRITE
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PERF_COUNT_HW_CACHE_OP_PREFETCH = C.PERF_COUNT_HW_CACHE_OP_PREFETCH
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PERF_COUNT_HW_CACHE_RESULT_ACCESS = C.PERF_COUNT_HW_CACHE_RESULT_ACCESS
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PERF_COUNT_HW_CACHE_RESULT_MISS = C.PERF_COUNT_HW_CACHE_RESULT_MISS
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PERF_COUNT_SW_CPU_CLOCK = C.PERF_COUNT_SW_CPU_CLOCK
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PERF_COUNT_SW_TASK_CLOCK = C.PERF_COUNT_SW_TASK_CLOCK
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PERF_COUNT_SW_PAGE_FAULTS = C.PERF_COUNT_SW_PAGE_FAULTS
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PERF_COUNT_SW_CONTEXT_SWITCHES = C.PERF_COUNT_SW_CONTEXT_SWITCHES
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PERF_COUNT_SW_CPU_MIGRATIONS = C.PERF_COUNT_SW_CPU_MIGRATIONS
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PERF_COUNT_SW_PAGE_FAULTS_MIN = C.PERF_COUNT_SW_PAGE_FAULTS_MIN
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PERF_COUNT_SW_PAGE_FAULTS_MAJ = C.PERF_COUNT_SW_PAGE_FAULTS_MAJ
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PERF_COUNT_SW_ALIGNMENT_FAULTS = C.PERF_COUNT_SW_ALIGNMENT_FAULTS
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PERF_COUNT_SW_EMULATION_FAULTS = C.PERF_COUNT_SW_EMULATION_FAULTS
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PERF_COUNT_SW_DUMMY = C.PERF_COUNT_SW_DUMMY
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PERF_SAMPLE_IP = C.PERF_SAMPLE_IP
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PERF_SAMPLE_TID = C.PERF_SAMPLE_TID
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PERF_SAMPLE_TIME = C.PERF_SAMPLE_TIME
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PERF_SAMPLE_ADDR = C.PERF_SAMPLE_ADDR
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PERF_SAMPLE_READ = C.PERF_SAMPLE_READ
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PERF_SAMPLE_CALLCHAIN = C.PERF_SAMPLE_CALLCHAIN
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PERF_SAMPLE_ID = C.PERF_SAMPLE_ID
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PERF_SAMPLE_CPU = C.PERF_SAMPLE_CPU
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PERF_SAMPLE_PERIOD = C.PERF_SAMPLE_PERIOD
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PERF_SAMPLE_STREAM_ID = C.PERF_SAMPLE_STREAM_ID
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PERF_SAMPLE_RAW = C.PERF_SAMPLE_RAW
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PERF_SAMPLE_BRANCH_STACK = C.PERF_SAMPLE_BRANCH_STACK
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PERF_SAMPLE_BRANCH_USER = C.PERF_SAMPLE_BRANCH_USER
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PERF_SAMPLE_BRANCH_KERNEL = C.PERF_SAMPLE_BRANCH_KERNEL
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PERF_SAMPLE_BRANCH_HV = C.PERF_SAMPLE_BRANCH_HV
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PERF_SAMPLE_BRANCH_ANY = C.PERF_SAMPLE_BRANCH_ANY
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PERF_SAMPLE_BRANCH_ANY_CALL = C.PERF_SAMPLE_BRANCH_ANY_CALL
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PERF_SAMPLE_BRANCH_ANY_RETURN = C.PERF_SAMPLE_BRANCH_ANY_RETURN
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PERF_SAMPLE_BRANCH_IND_CALL = C.PERF_SAMPLE_BRANCH_IND_CALL
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PERF_FORMAT_TOTAL_TIME_ENABLED = C.PERF_FORMAT_TOTAL_TIME_ENABLED
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PERF_FORMAT_TOTAL_TIME_RUNNING = C.PERF_FORMAT_TOTAL_TIME_RUNNING
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PERF_FORMAT_ID = C.PERF_FORMAT_ID
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PERF_FORMAT_GROUP = C.PERF_FORMAT_GROUP
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PERF_RECORD_MMAP = C.PERF_RECORD_MMAP
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PERF_RECORD_LOST = C.PERF_RECORD_LOST
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PERF_RECORD_COMM = C.PERF_RECORD_COMM
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PERF_RECORD_EXIT = C.PERF_RECORD_EXIT
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PERF_RECORD_THROTTLE = C.PERF_RECORD_THROTTLE
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PERF_RECORD_UNTHROTTLE = C.PERF_RECORD_UNTHROTTLE
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PERF_RECORD_FORK = C.PERF_RECORD_FORK
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PERF_RECORD_READ = C.PERF_RECORD_READ
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PERF_RECORD_SAMPLE = C.PERF_RECORD_SAMPLE
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PERF_CONTEXT_HV = C.PERF_CONTEXT_HV
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PERF_CONTEXT_KERNEL = C.PERF_CONTEXT_KERNEL
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PERF_CONTEXT_USER = C.PERF_CONTEXT_USER
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PERF_CONTEXT_GUEST = C.PERF_CONTEXT_GUEST
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PERF_CONTEXT_GUEST_KERNEL = C.PERF_CONTEXT_GUEST_KERNEL
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PERF_CONTEXT_GUEST_USER = C.PERF_CONTEXT_GUEST_USER
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PERF_FLAG_FD_NO_GROUP = C.PERF_FLAG_FD_NO_GROUP
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PERF_FLAG_FD_OUTPUT = C.PERF_FLAG_FD_OUTPUT
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PERF_FLAG_PID_CGROUP = C.PERF_FLAG_PID_CGROUP
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)
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// Platform ABI and calling convention
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// Bit field masks for interoperability with C code that uses bit fields.
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