Enum nc::types::perf_event_type_t [−][src]
pub enum perf_event_type_t {
Show 21 variants
PERF_RECORD_MMAP,
PERF_RECORD_LOST,
PERF_RECORD_COMM,
PERF_RECORD_EXIT,
PERF_RECORD_THROTTLE,
PERF_RECORD_UNTHROTTLE,
PERF_RECORD_FORK,
PERF_RECORD_READ,
PERF_RECORD_SAMPLE,
PERF_RECORD_MMAP2,
PERF_RECORD_AUX,
PERF_RECORD_ITRACE_START,
PERF_RECORD_LOST_SAMPLES,
PERF_RECORD_SWITCH,
PERF_RECORD_SWITCH_CPU_WIDE,
PERF_RECORD_NAMESPACES,
PERF_RECORD_KSYMBOL,
PERF_RECORD_BPF_EVENT,
PERF_RECORD_CGROUP,
PERF_RECORD_TEXT_POKE,
PERF_RECORD_MAX,
}Expand description
perf_event_type
Variants
PERF_RECORD_MMAP
If perf_event_attr.sample_id_all is set then all event types will have the sample_type selected fields related to where/when (identity) an event took place (TID, TIME, ID, STREAM_ID, CPU IDENTIFIER) described in PERF_RECORD_SAMPLE below, it will be stashed just after the perf_event_header and the fields already present for the existing fields, i.e. at the end of the payload. That way a newer perf.data file will be supported by older perf tools, with these new optional fields being ignored.
struct sample_id { { u32 pid, tid; } && PERF_SAMPLE_TID { u64 time; } && PERF_SAMPLE_TIME { u64 id; } && PERF_SAMPLE_ID { u64 stream_id;} && PERF_SAMPLE_STREAM_ID { u32 cpu, res; } && PERF_SAMPLE_CPU { u64 id; } && PERF_SAMPLE_IDENTIFIER } && perf_event_attr::sample_id_all
Note that PERF_SAMPLE_IDENTIFIER duplicates PERF_SAMPLE_ID. The advantage of PERF_SAMPLE_IDENTIFIER is that its position is fixed relative to header.size.
The MMAP events record the PROT_EXEC mappings so that we can correlate userspace IPs to code. They have the following structure:
struct { struct perf_event_header header;
u32 pid, tid; u64 addr; u64 len; u64 pgoff; char filename[]; struct sample_id sample_id; };
PERF_RECORD_LOST
struct { struct perf_event_header header; u64 id; u64 lost; struct sample_id sample_id; };
PERF_RECORD_COMM
struct {
struct perf_event_header header;
u32 pid, tid;
char comm[];
struct sample_id sample_id;
};PERF_RECORD_EXIT
struct { struct perf_event_header header; u32 pid, ppid; u32 tid, ptid; u64 time; struct sample_id sample_id; };
PERF_RECORD_THROTTLE
struct {
struct perf_event_header header;
u64 time;
u64 id;
u64 stream_id;
struct sample_id sample_id;
};PERF_RECORD_UNTHROTTLE
PERF_RECORD_FORK
struct {
struct perf_event_header header;
u32 pid, ppid;
u32 tid, ptid;
u64 time;
struct sample_id sample_id;
};PERF_RECORD_READ
struct {
struct perf_event_header header;
u32 pid, tid;
struct read_format values;
struct sample_id sample_id;
};PERF_RECORD_SAMPLE
struct {
struct perf_event_header header;
{ u64 id; } && PERF_SAMPLE_IDENTIFIER
{ u64 ip; } && PERF_SAMPLE_IP
{ u32 pid, tid; } && PERF_SAMPLE_TID
{ u64 time; } && PERF_SAMPLE_TIME
{ u64 addr; } && PERF_SAMPLE_ADDR
{ u64 id; } && PERF_SAMPLE_ID
{ u64 stream_id; } && PERF_SAMPLE_STREAM_ID
{ u32 cpu, res; } && PERF_SAMPLE_CPU
{ u64 period; } && PERF_SAMPLE_PERIOD
{ struct read_format values; } && PERF_SAMPLE_READ
{ u64 nr;
u64 ips[nr]; } && PERF_SAMPLE_CALLCHAIN
{ u32 size;
char data[size]; }&& PERF_SAMPLE_RAW
{ u64 nr;
{ u64 from, to, flags } lbr[nr];} && PERF_SAMPLE_BRANCH_STACK
{ u64 abi; # enum perf_sample_regs_abi
u64 regs[weight(mask)]; } && PERF_SAMPLE_REGS_USER
{ u64 size;
char data[size];
u64 dyn_size; } && PERF_SAMPLE_STACK_USER
{ u64 weight; } && PERF_SAMPLE_WEIGHT
{ u64 data_src; } && PERF_SAMPLE_DATA_SRC
{ u64 transaction; } && PERF_SAMPLE_TRANSACTION
{ u64 abi; # enum perf_sample_regs_abi
u64 regs[weight(mask)]; } && PERF_SAMPLE_REGS_INTR
{ u64 phys_addr;} && PERF_SAMPLE_PHYS_ADDR
};PERF_RECORD_MMAP2
The MMAP2 records are an augmented version of MMAP, they add maj, min, ino numbers to be used to uniquely identify each mapping
struct { struct perf_event_header header; u32 pid, tid; u64 addr; u64 len; u64 pgoff; u32 maj; u32 min; u64 ino; u64 ino_generation; u32 prot, flags; char filename[]; struct sample_id sample_id; };
PERF_RECORD_AUX
Records that new data landed in the AUX buffer part.
struct {
struct perf_event_header header;
u64 aux_offset;
u64 aux_size;
u64 flags;
struct sample_id sample_id;
};PERF_RECORD_ITRACE_START
Indicates that instruction trace has started
struct {
struct perf_event_header header;
u32 pid;
u32 tid;
struct sample_id sample_id;
};PERF_RECORD_LOST_SAMPLES
Records the dropped/lost sample number.
struct {
struct perf_event_header header;
u64 lost;
struct sample_id sample_id;
};PERF_RECORD_SWITCH
Records a context switch in or out (flagged by PERF_RECORD_MISC_SWITCH_OUT). See also PERF_RECORD_SWITCH_CPU_WIDE.
struct {
struct perf_event_header header;
struct sample_id sample_id;
};PERF_RECORD_SWITCH_CPU_WIDE
CPU-wide version of PERF_RECORD_SWITCH with next_prev_pid and next_prev_tid that are the next (switching out) or previous (switching in) pid/tid.
struct {
struct perf_event_header header;
u32 next_prev_pid;
u32 next_prev_tid;
struct sample_id sample_id;
};PERF_RECORD_NAMESPACES
struct {
struct perf_event_header header;
u32 pid;
u32 tid;
u64 nr_namespaces;
{ u64 dev, inode; } [nr_namespaces];
struct sample_id sample_id;
};PERF_RECORD_KSYMBOL
Record ksymbol register/unregister events:
struct {
struct perf_event_header header;
u64 addr;
u32 len;
u16 ksym_type;
u16 flags;
char name[];
struct sample_id sample_id;
};PERF_RECORD_BPF_EVENT
Record bpf events:
enum perf_bpf_event_type {
PERF_BPF_EVENT_UNKNOWN = 0,
PERF_BPF_EVENT_PROG_LOAD = 1,
PERF_BPF_EVENT_PROG_UNLOAD = 2,
};
struct {
struct perf_event_header header;
u16 type;
u16 flags;
u32 id;
u8 tag[BPF_TAG_SIZE];
struct sample_id sample_id;
};PERF_RECORD_CGROUP
struct {
struct perf_event_header header;
u64 id;
char path[];
struct sample_id sample_id;
};PERF_RECORD_TEXT_POKE
Records changes to kernel text i.e. self-modified code. ‘old_len’ is the number of old bytes, ‘new_len’ is the number of new bytes. Either ‘old_len’ or ‘new_len’ may be zero to indicate, for example, the addition or removal of a trampoline. ‘bytes’ contains the old bytes followed immediately by the new bytes.
struct {
struct perf_event_header header;
u64 addr;
u16 old_len;
u16 new_len;
u8 bytes[];
struct sample_id sample_id;
};PERF_RECORD_MAX
non-ABI