1 // SPDX-License-Identifier: GPL-2.0
33  * interval for the previous state: Duration(Idx) = Ts` - Ts.
38  * +--------------------------+
40  * +--------------------------+
42  * +--------------------------+
44  * +--------------------------+
46  * +--------------------------+
56 	__type(key, u32);
64 	__type(key, u32);
72 	__type(key, u32);
79  * /sys/kernel/tracing/events/power/cpu_idle/format
80  * /sys/kernel/tracing/events/power/cpu_frequency/format
103 SEC("tracepoint/power/cpu_idle")
107 	u32 key, cpu, pstate_idx;  in bpf_prog1()  local
110 	if (ctx->cpu_id > MAX_CPU)  in bpf_prog1()
113 	cpu = ctx->cpu_id;  in bpf_prog1()
115 	key = cpu * MAP_OFF_NUM + MAP_OFF_CSTATE_TIME;  in bpf_prog1()
116 	cts = bpf_map_lookup_elem(&my_map, &key);  in bpf_prog1()
120 	key = cpu * MAP_OFF_NUM + MAP_OFF_CSTATE_IDX;  in bpf_prog1()
121 	cstate = bpf_map_lookup_elem(&my_map, &key);  in bpf_prog1()
125 	key = cpu * MAP_OFF_NUM + MAP_OFF_PSTATE_TIME;  in bpf_prog1()
126 	pts = bpf_map_lookup_elem(&my_map, &key);  in bpf_prog1()
130 	key = cpu * MAP_OFF_NUM + MAP_OFF_PSTATE_IDX;  in bpf_prog1()
131 	pstate = bpf_map_lookup_elem(&my_map, &key);  in bpf_prog1()
136 	*cstate = ctx->state;  in bpf_prog1()
144 	delta = cur_ts - *cts;  in bpf_prog1()
148 	 * When state doesn't equal to (u32)-1, the cpu will enter  in bpf_prog1()
153 	 *            +---------------------+  in bpf_prog1()
155 	 *   ---------+                     |  in bpf_prog1()
157 	 *                                  +---------------  in bpf_prog1()
159 	 *            |<- pstate duration ->|  in bpf_prog1()
163 	if (ctx->state != (u32)-1) {  in bpf_prog1()
169 		delta = cur_ts - *pts;  in bpf_prog1()
175 		key = cpu * MAX_PSTATE_ENTRIES + pstate_idx;  in bpf_prog1()
176 		val = bpf_map_lookup_elem(&pstate_duration, &key);  in bpf_prog1()
181 	 * When state equal to (u32)-1, the cpu just exits from one  in bpf_prog1()
186 	 *   -----------+  in bpf_prog1()
188 	 *              |                     +-----------  in bpf_prog1()
190 	 *              +---------------------+  in bpf_prog1()
192 	 *              |<- cstate duration ->|  in bpf_prog1()
198 		key = cpu * MAX_CSTATE_ENTRIES + prev_state;  in bpf_prog1()
199 		val = bpf_map_lookup_elem(&cstate_duration, &key);  in bpf_prog1()
211 SEC("tracepoint/power/cpu_frequency")
215 	u32 key, cpu, pstate_idx;  in bpf_prog2()  local
218 	cpu = ctx->cpu_id;  in bpf_prog2()
220 	key = cpu * MAP_OFF_NUM + MAP_OFF_PSTATE_TIME;  in bpf_prog2()
221 	pts = bpf_map_lookup_elem(&my_map, &key);  in bpf_prog2()
225 	key = cpu * MAP_OFF_NUM + MAP_OFF_PSTATE_IDX;  in bpf_prog2()
226 	pstate = bpf_map_lookup_elem(&my_map, &key);  in bpf_prog2()
230 	key = cpu * MAP_OFF_NUM + MAP_OFF_CSTATE_IDX;  in bpf_prog2()
231 	cstate = bpf_map_lookup_elem(&my_map, &key);  in bpf_prog2()
235 	*pstate = ctx->state;  in bpf_prog2()
243 	delta = cur_ts - *pts;  in bpf_prog2()
247 	if (*cstate != (u32)(-1))  in bpf_prog2()
257 	 *            +---------------------+  in bpf_prog2()
259 	 *   ---------+                     |  in bpf_prog2()
261 	 *                                  +---------------  in bpf_prog2()
263 	 *            |<- pstate duration ->|  in bpf_prog2()
271 	key = cpu * MAX_PSTATE_ENTRIES + pstate_idx;  in bpf_prog2()
272 	val = bpf_map_lookup_elem(&pstate_duration, &key);  in bpf_prog2()