forked from ccfos/huatuo
65 lines
1.4 KiB
C
65 lines
1.4 KiB
C
#include "vmlinux.h"
|
|
|
|
#include <bpf/bpf_core_read.h>
|
|
#include <bpf/bpf_helpers.h>
|
|
#include <bpf/bpf_tracing.h>
|
|
|
|
#include "bpf_common.h"
|
|
#include "bpf_func_trace.h"
|
|
#include "bpf_ratelimit.h"
|
|
|
|
char __license[] SEC("license") = "Dual MIT/GPL";
|
|
|
|
volatile const unsigned long deltath = 0;
|
|
|
|
struct {
|
|
__uint(type, BPF_MAP_TYPE_PERF_EVENT_ARRAY);
|
|
__uint(key_size, sizeof(int));
|
|
__uint(value_size, sizeof(u32));
|
|
} reclaim_perf_events SEC(".maps");
|
|
|
|
struct reclaim_entry {
|
|
char comm[COMPAT_TASK_COMM_LEN];
|
|
u64 delta_time;
|
|
u64 css;
|
|
u64 pid;
|
|
};
|
|
|
|
SEC("kprobe/try_to_free_pages")
|
|
int kprobe_try_to_free_pages(struct pt_regs *ctx)
|
|
{
|
|
func_trace_begain(bpf_get_current_pid_tgid());
|
|
return 0;
|
|
}
|
|
|
|
SEC("kretprobe/try_to_free_pages")
|
|
int kretprobe_try_to_free_pages(struct pt_regs *ctx)
|
|
{
|
|
struct trace_entry_ctx *entry;
|
|
struct task_struct *task;
|
|
|
|
entry = func_trace_end(bpf_get_current_pid_tgid());
|
|
if (!entry)
|
|
return 0;
|
|
|
|
if (entry->delta_ns > deltath) {
|
|
task = (struct task_struct *)bpf_get_current_task();
|
|
|
|
struct reclaim_entry data = {
|
|
.pid = entry->id,
|
|
.css = (u64)BPF_CORE_READ(task, cgroups,
|
|
subsys[cpu_cgrp_id]),
|
|
.delta_time = entry->delta_ns,
|
|
};
|
|
|
|
bpf_get_current_comm(data.comm, sizeof(data.comm));
|
|
|
|
bpf_perf_event_output(ctx, &reclaim_perf_events,
|
|
COMPAT_BPF_F_CURRENT_CPU, &data,
|
|
sizeof(struct reclaim_entry));
|
|
}
|
|
|
|
func_trace_destroy(entry->id);
|
|
return 0;
|
|
}
|