ccfos
/
huatuo
6
0
Fork 3
Code Issues Pull Requests Packages Projects Releases Wiki Activity

metric: support runqlat for upstream kernel 

Change-Id: If1bda054b1befc35b8767469a81b9ac00984ebea
Signed-off-by: Honglei Wang <jameshongleiwang@126.com>
Signed-off-by: Tonghao Zhang <tonghao@bamaicloud.com>
This commit is contained in:
Honglei Wang 2025-07-14 22:21:52 -04:00 committed by Tonghao Zhang
parent bfdc010cc1
commit dffa1284a2
1 changed files with 23 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

26
bpf/runqlat_tracing.c
View File

@ -112,12 +112,34 @@ int sched_wakeup_entry(struct trace_event_raw_sched_wakeup_template *ctx)
return trace_enqueue(ctx->pid);
}
struct task_struct___5_14 {
unsigned int __state;
} __attribute__((preserve_access_index));
long get_task_state(struct task_struct *task)
{
long state;
if (task == NULL)
return -1;
if (bpf_core_field_exists(task->state))
state = BPF_CORE_READ(task, state);
else {
struct task_struct___5_14 *task_new = (struct task_struct___5_14 *)task;
state = (long)BPF_CORE_READ(task_new, __state);
}
return state;
}
SEC("raw_tracepoint/sched_switch")
int sched_switch_entry(struct bpf_raw_tracepoint_args *ctx)
{
u32 prev_pid, next_pid, g_key = 0;
u64 now, *tsp, delta;
bool is_voluntary;
long state;
struct stat_t *entry;
struct g_stat_t *g_entry;
@ -134,9 +156,7 @@ int sched_switch_entry(struct bpf_raw_tracepoint_args *ctx)
u32 key = BPF_CORE_READ(prev, nsproxy, pid_ns_for_children, ns.inum);
#endif
long state;
// to avoid compilation warning, use raw interface instead of macro _()
bpf_probe_read(&state, sizeof(long), (void *)&(prev->state));
state = get_task_state(prev);
// ivcsw: treat like an enqueue event and store timestamp
prev_pid = _(prev->pid);