Open yunwei37 opened 6 months ago
Like
SEC("perf_event")
int profile(void *ctx)
{
int pid = bpf_get_current_pid_tgid() >> 32;
int cpu_id = bpf_get_smp_processor_id();
struct stacktrace_event *event;
int cp;
event = bpf_ringbuf_reserve(&events, sizeof(*event), 0);
if (!event)
return 1;
event->pid = pid;
event->cpu_id = cpu_id;
if (bpf_get_current_comm(event->comm, sizeof(event->comm)))
event->comm[0] = 0;
event->kstack_sz = bpf_get_stack(ctx, event->kstack, sizeof(event->kstack), 0);
event->ustack_sz = bpf_get_stack(ctx, event->ustack, sizeof(event->ustack), BPF_F_USER_STACK);
bpf_ringbuf_submit(event, 0);
return 0;
}
Is your feature request related to a problem? Please describe.
Is it possible to add perf event support for userspace eBPF?
It can support sampling instead of trace.
Describe the solution you'd like
Describe alternatives you've considered
Provide usage examples
Additional context