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>
diff --git a/unix/ztypes_linux_mipsle.go b/unix/ztypes_linux_mipsle.go
index 57e35d1..46fa3f9 100644
--- a/unix/ztypes_linux_mipsle.go
+++ b/unix/ztypes_linux_mipsle.go
@@ -890,6 +890,177 @@
BDADDR_LE_RANDOM = 0x2
)
+type PerfEventAttr struct {
+ Type uint32
+ Size uint32
+ Config uint64
+ Sample uint64
+ Sample_type uint64
+ Read_format uint64
+ Bits uint64
+ Wakeup uint32
+ Bp_type uint32
+ Ext1 uint64
+ Ext2 uint64
+ Branch_sample_type uint64
+ Sample_regs_user uint64
+ Sample_stack_user uint32
+ Clockid int32
+ Sample_regs_intr uint64
+ Aux_watermark uint32
+ _ uint32
+}
+
+type PerfEventMmapPage struct {
+ Version uint32
+ Compat_version uint32
+ Lock uint32
+ Index uint32
+ Offset int64
+ Time_enabled uint64
+ Time_running uint64
+ Capabilities uint64
+ Pmc_width uint16
+ Time_shift uint16
+ Time_mult uint32
+ Time_offset uint64
+ Time_zero uint64
+ Size uint32
+ _ [948]uint8
+ Data_head uint64
+ Data_tail uint64
+ Data_offset uint64
+ Data_size uint64
+ Aux_head uint64
+ Aux_tail uint64
+ Aux_offset uint64
+ Aux_size uint64
+}
+
+const (
+ PerfBitDisabled uint64 = CBitFieldMaskBit0
+ PerfBitInherit = CBitFieldMaskBit1
+ PerfBitPinned = CBitFieldMaskBit2
+ PerfBitExclusive = CBitFieldMaskBit3
+ PerfBitExcludeUser = CBitFieldMaskBit4
+ PerfBitExcludeKernel = CBitFieldMaskBit5
+ PerfBitExcludeHv = CBitFieldMaskBit6
+ PerfBitExcludeIdle = CBitFieldMaskBit7
+ PerfBitMmap = CBitFieldMaskBit8
+ PerfBitComm = CBitFieldMaskBit9
+ PerfBitFreq = CBitFieldMaskBit10
+ PerfBitInheritStat = CBitFieldMaskBit11
+ PerfBitEnableOnExec = CBitFieldMaskBit12
+ PerfBitTask = CBitFieldMaskBit13
+ PerfBitWatermark = CBitFieldMaskBit14
+ PerfBitPreciseIPBit1 = CBitFieldMaskBit15
+ PerfBitPreciseIPBit2 = CBitFieldMaskBit16
+ PerfBitMmapData = CBitFieldMaskBit17
+ PerfBitSampleIDAll = CBitFieldMaskBit18
+ PerfBitExcludeHost = CBitFieldMaskBit19
+ PerfBitExcludeGuest = CBitFieldMaskBit20
+ PerfBitExcludeCallchainKernel = CBitFieldMaskBit21
+ PerfBitExcludeCallchainUser = CBitFieldMaskBit22
+ PerfBitMmap2 = CBitFieldMaskBit23
+ PerfBitCommExec = CBitFieldMaskBit24
+ PerfBitUseClockID = CBitFieldMaskBit25
+ PerfBitContextSwitch = CBitFieldMaskBit26
+)
+
+const (
+ PERF_TYPE_HARDWARE = 0x0
+ PERF_TYPE_SOFTWARE = 0x1
+ PERF_TYPE_TRACEPOINT = 0x2
+ PERF_TYPE_HW_CACHE = 0x3
+ PERF_TYPE_RAW = 0x4
+ PERF_TYPE_BREAKPOINT = 0x5
+
+ PERF_COUNT_HW_CPU_CYCLES = 0x0
+ PERF_COUNT_HW_INSTRUCTIONS = 0x1
+ PERF_COUNT_HW_CACHE_REFERENCES = 0x2
+ PERF_COUNT_HW_CACHE_MISSES = 0x3
+ PERF_COUNT_HW_BRANCH_INSTRUCTIONS = 0x4
+ PERF_COUNT_HW_BRANCH_MISSES = 0x5
+ PERF_COUNT_HW_BUS_CYCLES = 0x6
+ PERF_COUNT_HW_STALLED_CYCLES_FRONTEND = 0x7
+ PERF_COUNT_HW_STALLED_CYCLES_BACKEND = 0x8
+ PERF_COUNT_HW_REF_CPU_CYCLES = 0x9
+
+ PERF_COUNT_HW_CACHE_L1D = 0x0
+ PERF_COUNT_HW_CACHE_L1I = 0x1
+ PERF_COUNT_HW_CACHE_LL = 0x2
+ PERF_COUNT_HW_CACHE_DTLB = 0x3
+ PERF_COUNT_HW_CACHE_ITLB = 0x4
+ PERF_COUNT_HW_CACHE_BPU = 0x5
+ PERF_COUNT_HW_CACHE_NODE = 0x6
+
+ PERF_COUNT_HW_CACHE_OP_READ = 0x0
+ PERF_COUNT_HW_CACHE_OP_WRITE = 0x1
+ PERF_COUNT_HW_CACHE_OP_PREFETCH = 0x2
+
+ PERF_COUNT_HW_CACHE_RESULT_ACCESS = 0x0
+ PERF_COUNT_HW_CACHE_RESULT_MISS = 0x1
+
+ PERF_COUNT_SW_CPU_CLOCK = 0x0
+ PERF_COUNT_SW_TASK_CLOCK = 0x1
+ PERF_COUNT_SW_PAGE_FAULTS = 0x2
+ PERF_COUNT_SW_CONTEXT_SWITCHES = 0x3
+ PERF_COUNT_SW_CPU_MIGRATIONS = 0x4
+ PERF_COUNT_SW_PAGE_FAULTS_MIN = 0x5
+ PERF_COUNT_SW_PAGE_FAULTS_MAJ = 0x6
+ PERF_COUNT_SW_ALIGNMENT_FAULTS = 0x7
+ PERF_COUNT_SW_EMULATION_FAULTS = 0x8
+ PERF_COUNT_SW_DUMMY = 0x9
+
+ PERF_SAMPLE_IP = 0x1
+ PERF_SAMPLE_TID = 0x2
+ PERF_SAMPLE_TIME = 0x4
+ PERF_SAMPLE_ADDR = 0x8
+ PERF_SAMPLE_READ = 0x10
+ PERF_SAMPLE_CALLCHAIN = 0x20
+ PERF_SAMPLE_ID = 0x40
+ PERF_SAMPLE_CPU = 0x80
+ PERF_SAMPLE_PERIOD = 0x100
+ PERF_SAMPLE_STREAM_ID = 0x200
+ PERF_SAMPLE_RAW = 0x400
+ PERF_SAMPLE_BRANCH_STACK = 0x800
+
+ PERF_SAMPLE_BRANCH_USER = 0x1
+ PERF_SAMPLE_BRANCH_KERNEL = 0x2
+ PERF_SAMPLE_BRANCH_HV = 0x4
+ PERF_SAMPLE_BRANCH_ANY = 0x8
+ PERF_SAMPLE_BRANCH_ANY_CALL = 0x10
+ PERF_SAMPLE_BRANCH_ANY_RETURN = 0x20
+ PERF_SAMPLE_BRANCH_IND_CALL = 0x40
+
+ PERF_FORMAT_TOTAL_TIME_ENABLED = 0x1
+ PERF_FORMAT_TOTAL_TIME_RUNNING = 0x2
+ PERF_FORMAT_ID = 0x4
+ PERF_FORMAT_GROUP = 0x8
+
+ PERF_RECORD_MMAP = 0x1
+ PERF_RECORD_LOST = 0x2
+ PERF_RECORD_COMM = 0x3
+ PERF_RECORD_EXIT = 0x4
+ PERF_RECORD_THROTTLE = 0x5
+ PERF_RECORD_UNTHROTTLE = 0x6
+ PERF_RECORD_FORK = 0x7
+ PERF_RECORD_READ = 0x8
+ PERF_RECORD_SAMPLE = 0x9
+
+ PERF_CONTEXT_HV = -0x20
+ PERF_CONTEXT_KERNEL = -0x80
+ PERF_CONTEXT_USER = -0x200
+
+ PERF_CONTEXT_GUEST = -0x800
+ PERF_CONTEXT_GUEST_KERNEL = -0x880
+ PERF_CONTEXT_GUEST_USER = -0xa00
+
+ PERF_FLAG_FD_NO_GROUP = 0x1
+ PERF_FLAG_FD_OUTPUT = 0x2
+ PERF_FLAG_PID_CGROUP = 0x4
+)
+
const (
CBitFieldMaskBit0 = 0x1
CBitFieldMaskBit1 = 0x2
