OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of system in rack #f, slot #7

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Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rackfslot7.osadl.org (updated Sat Jan 31, 2026 00:46:12)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3436561	99	71	12,39	cyclictest	3505878	-21	kworker/u32:4+flush-8:0	21:56:14	7
3436561	99	69	31,38	cyclictest	3590996	-21	kworker/u32:2+events_unbound	00:32:25	7
3436561	99	59	39,20	cyclictest	3515382	-21	kworker/u32:0+events_unbound	21:50:14	7
3436561	99	59	0,59	cyclictest	1095306	-21	kworker/u32:0+flush-8:0	19:56:06	7
3436561	99	56	38,18	cyclictest	0	-21	swapper/7	20:26:07	7
3436552	99	53	14,19	cyclictest	0	-21	swapper/1	21:20:15	1
3436561	99	52	33,19	cyclictest	0	-21	swapper/7	21:05:14	7
3436553	99	52	14,0	cyclictest	0	-21	swapper/2	22:40:15	2
3436553	99	52	13,39	cyclictest	0	-21	swapper/2	19:10:16	2
3436552	99	52	9,19	cyclictest	0	-21	swapper/1	00:00:15	1
3436559	99	51	14,18	cyclictest	0	-21	swapper/6	23:25:16	6
3436552	99	51	13,19	cyclictest	0	-21	swapper/1	23:05:15	1
3436552	99	51	12,39	cyclictest	0	-21	swapper/1	21:55:13	1
3436561	99	50	12,19	cyclictest	0	-21	swapper/7	23:50:16	7
3436559	99	50	12,19	cyclictest	0	-21	swapper/6	23:50:15	6
3436552	99	50	12,38	cyclictest	0	-21	swapper/1	19:50:16	1
3436558	99	49	31,18	cyclictest	0	-21	swapper/5	21:35:16	5
3436558	99	48	10,19	cyclictest	0	-21	swapper/5	22:40:14	5
3436554	99	48	10,19	cyclictest	0	-21	swapper/3	20:05:14	3
3436553	99	48	9,39	cyclictest	0	-21	swapper/2	19:45:14	2
3436552	99	48	10,19	cyclictest	0	-21	swapper/1	23:15:12	1
3436553	99	47	7,39	cyclictest	0	-21	swapper/2	21:25:15	2
3436553	99	46	8,19	cyclictest	0	-21	swapper/2	22:05:16	2
3436553	99	46	8,19	cyclictest	0	-21	swapper/2	19:25:16	2
3436552	99	46	8,19	cyclictest	0	-21	swapper/1	21:40:16	1
3436552	99	46	7,38	cyclictest	0	-21	swapper/1	19:20:15	1
3436552	99	46	7,38	cyclictest	0	-21	swapper/1	19:20:15	1
3436554	99	43	4,19	cyclictest	0	-21	swapper/3	23:30:16	3
3436559	99	42	5,18	cyclictest	0	-21	swapper/6	20:10:16	6
3436554	99	42	3,39	cyclictest	0	-21	swapper/3	23:00:16	3
3436558	99	41	4,18	cyclictest	0	-21	swapper/5	19:30:15	5
3436557	99	41	19,19	cyclictest	19	1	rcu_preempt	19:11:20	4
3436554	99	41	2,39	cyclictest	0	-21	swapper/3	22:15:14	3
3436552	99	41	3,19	cyclictest	0	-21	swapper/1	20:10:15	1
3436559	99	40	22,18	cyclictest	0	-21	swapper/6	00:20:15	6
3436558	99	40	2,19	cyclictest	0	-21	swapper/5	23:55:17	5
3436557	99	40	18,21	cyclictest	413	-21	systemd-journal	00:05:01	4
3436552	99	40	2,19	cyclictest	0	-21	swapper/1	22:05:16	1
3436557	99	39	39,0	cyclictest	60	1	ktimers/4	19:55:24	4
3436557	99	39	19,19	cyclictest	3490899	-21	ps	20:45:19	4
3436557	99	39	1,37	cyclictest	0	-21	swapper/4	22:25:02	4
3436557	99	39	0,38	cyclictest	3607666	-21	date	00:20:01	4
3436557	99	39	0,38	cyclictest	0	-21	swapper/4	23:44:29	4
3436557	99	39	0,38	cyclictest	0	-21	swapper/4	21:31:02	4
3436557	99	39	0,17	cyclictest	0	-21	swapper/4	21:05:18	4
3436558	99	38	0,19	cyclictest	0	-21	swapper/5	22:00:15	5
3436557	99	38	19,19	cyclictest	60	1	ktimers/4	23:10:32	4
3436557	99	38	18,19	cyclictest	907	50	irq/69-eno6-TxRx-7	23:24:26	4
3436557	99	38	18,19	cyclictest	60	1	ktimers/4	23:49:54	4
3436557	99	38	18,19	cyclictest	60	1	ktimers/4	23:49:53	4
3436557	99	38	18,19	cyclictest	0	-21	swapper/4	22:31:05	4
3436557	99	38	17,20	cyclictest	3467581	-21	aten2.4_rfpower	20:05:12	4
3436557	99	38	0,38	cyclictest	0	-21	swapper/4	22:35:30	4
3436557	99	38	0,38	cyclictest	0	-21	swapper/4	21:00:47	4
3436557	99	38	0,38	cyclictest	0	-21	swapper/4	20:18:28	4
3436557	99	38	0,38	cyclictest	0	-21	swapper/4	00:39:26	4
3436557	99	38	0,37	cyclictest	0	-21	swapper/4	23:18:49	4
3436557	99	38	0,37	cyclictest	0	-21	swapper/4	21:57:05	4
3436557	99	38	0,37	cyclictest	0	-21	swapper/4	20:40:12	4
3436554	99	38	0,19	cyclictest	0	-21	swapper/3	19:55:16	3
3436554	99	38	0,19	cyclictest	0	-21	swapper/3	19:10:16	3
3436553	99	38	0,19	cyclictest	0	-21	swapper/2	22:10:14	2
3436552	99	38	1,37	cyclictest	0	-21	swapper/1	23:00:16	1
3436559	99	37	0,37	cyclictest	0	-21	swapper/6	20:40:19	6
3436558	99	37	18,19	cyclictest	0	-21	swapper/5	22:05:16	5
3436557	99	37	18,19	cyclictest	874	-21	mta-sts-daemon	22:53:46	4
3436557	99	37	18,18	cyclictest	0	-21	swapper/4	19:21:11	4
3436557	99	37	18,18	cyclictest	0	-21	swapper/4	19:21:11	4
3436557	99	37	17,19	cyclictest	60	1	ktimers/4	23:02:00	4
3436557	99	37	17,19	cyclictest	0	-21	swapper/4	22:56:41	4
3436557	99	37	17,19	cyclictest	0	-21	swapper/4	20:35:53	4
3436557	99	37	14,19	cyclictest	0	-21	swapper/4	22:24:59	4
3436557	99	37	13,24	cyclictest	0	-21	swapper/4	00:15:14	4
3436557	99	37	0,37	cyclictest	0	-21	swapper/4	23:59:49	4
3436557	99	37	0,37	cyclictest	0	-21	swapper/4	20:02:21	4
3436557	99	37	0,36	cyclictest	0	-21	swapper/4	21:15:04	4
3436557	99	37	0,36	cyclictest	0	-21	swapper/4	19:40:25	4
3436557	99	37	0,18	cyclictest	3535315	-21	timerandwakeup	22:05:24	4
3436557	99	37	0,18	cyclictest	0	-21	swapper/4	20:28:27	4
3436557	99	37	0,17	cyclictest	0	-21	swapper/4	21:20:29	4
3436554	99	37	0,37	cyclictest	0	-21	swapper/3	20:45:15	3
3436552	99	37	12,19	cyclictest	0	-21	swapper/1	21:05:14	1
3436558	99	36	18,0	cyclictest	0	-21	swapper/5	20:50:15	5
3436558	99	36	17,19	cyclictest	0	-21	swapper/5	21:55:14	5
3436557	99	36	18,18	cyclictest	0	-21	swapper/4	00:25:16	4
3436557	99	36	18,0	cyclictest	0	-21	swapper/4	19:51:17	4
3436557	99	36	17,19	cyclictest	872	-21	mta-sts-daemon	22:46:36	4
3436557	99	36	17,19	cyclictest	0	-21	swapper/4	23:31:58	4
3436557	99	36	17,19	cyclictest	0	-21	swapper/4	22:40:53	4
3436557	99	36	17,19	cyclictest	0	-21	swapper/4	22:14:02	4
3436557	99	36	17,19	cyclictest	0	-21	swapper/4	22:01:14	4
3436557	99	36	17,19	cyclictest	0	-21	swapper/4	20:56:10	4
3436557	99	36	17,19	cyclictest	0	-21	swapper/4	20:20:20	4
3436557	99	36	17,19	cyclictest	0	-21	swapper/4	00:11:22	4
3436557	99	36	13,0	cyclictest	0	-21	swapper/4	19:30:15	4
3436557	99	36	0,36	cyclictest	0	-21	swapper/4	23:08:17	4
3436557	99	36	0,35	cyclictest	0	-21	swapper/4	23:35:42	4
3436557	99	36	0,35	cyclictest	0	-21	swapper/4	22:16:54	4
3436557	99	36	0,35	cyclictest	0	-21	swapper/4	21:50:04	4
3436557	99	36	0,35	cyclictest	0	-21	swapper/4	21:45:03	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2024-07-29 - 23:00