OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #f, slot #4

Rack #0/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #1/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #2/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #3/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #4/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #5/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #6/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #7/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #8/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #9/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #a/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #b/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #c/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #d/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #e/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #f/#0 #1 #2 #3 #4 #5 #6 #7 #8
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Click here to display the system's profile data or here to proceed to next system.

Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.
Data to construct the above plot have been generated using the RT test utility cyclictest.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system

Characteristics of the 792 highest latencies:

System rackfslot4s.osadl.org (updated Sat Mar 21, 2026 12:44:35)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
28165	2	121	0,3	chrt	28166	-21	seq	12:03:45	0
20823	2	121	0,2	chrt	20808	-21	ntpq	08:35:54	0
12193	2	121	0,3	chrt	12192	-21	ssh	11:40:21	0
17977	2	120	0,2	sleep0	17978	-21	seq	11:00:08	0
4328	2	119	0,3	chrt	4330	-21	sleep	08:10:25	0
25672	2	118	0,2	chrt	25667	-21	irqstats	11:11:08	0
15637	2	115	0,2	chrt	15638	-21	runrttasks	12:32:58	0
8444	2	114	0,2	chrt	8445	-21	runrttasks	09:56:33	0
3748	2	114	0,2	sleep0	3749	-21	runrttasks	09:50:07	0
25214	2	114	0,2	sleep0	25218	-21	seq	09:33:31	0
11730	2	114	0,3	chrt	11731	-21	sshd	12:27:09	0
5893	2	113	0,2	chrt	5894	-21	runrttasks	12:18:30	0
4475	2	112	0,2	chrt	4471	-21	ps	09:01:23	0
2329	2	111	0,2	chrt	2332	-21	ssh	10:36:04	0
9434	2	110	0,2	chrt	9435	-21	ssh	09:10:30	0
9382	2	110	0,2	chrt	9383	-21	gcc	10:46:32	0
32121	2	110	0,1	sleep0	32122	-21	sshd	12:09:54	0
7631	2	109	0,2	chrt	7632	-21	sh	10:44:31	0
31880	2	109	0,2	chrt	31879	-21	perl	11:20:50	0
30533	2	109	0,2	sleep0	30535	-21	ntp_offset	08:51:07	0
19323	2	108	0,3	chrt	19324	-21	sleep	12:38:52	0
14931	2	106	0,2	chrt	14932	-21	sh	07:35:22	0
30435	2	103	0,2	chrt	30436	-21	ssh	11:18:30	0
18849	2	98	0,2	sleep0	18850	-21	seq	08:32:57	0
31930	2	96	0,2	sleep0	31932	-21	seq	09:43:31	0
31967	2	94	0,3	chrt	31237	-21	apt-get	07:11:06	0
2943	2	90	0,2	sleep0	2944	-21	if_eth1	11:26:03	0
940	2	89	0,2	sleep0	941	-21	seq	08:05:14	0
8989	2	85	0,2	sleep0	8990	-21	fschecks_time	07:25:36	0
24412	2	85	0,2	sleep0	24413	-21	runrttasks	08:41:28	0
21458	2	82	0,2	sleep0	21459	-21	aten2.4-expect	11:05:31	0
19711	2	73	0,2	sleep0	19713	-21	cut	11:51:24	0
6150	2	72	0,1	sleep0	6151	-21	cat	11:30:57	0
24144	2	70	0,2	sleep0	24146	-21	ls	11:57:19	0
13625	2	68	0,2	sleep0	13629	-21	wc	10:05:04	0
3216	2	67	0,2	sleep0	3217	-21	runrttasks	09:49:08	0
17216	2	65	0,1	sleep0	17219	-21	sed	09:21:18	0
22562	2	61	0,1	sleep0	22582	-21	runrttasks	09:30:04	0
28904	2	60	0,2	sleep0	28905	-21	seq	08:49:24	0
23524	2	60	0,2	sleep0	23525	-21	seq	10:19:42	0
31300	90	59	40,13	cyclictest	30264	-21	sshd	10:29:54	0
31300	90	59	40,12	cyclictest	22195	-21	seq	07:46:11	0
31300	90	59	37,13	cyclictest	15814	-21	memory	10:56:15	0
31300	90	57	36,12	cyclictest	25250	-21	ntpq	10:21:36	0
31300	90	56	37,12	cyclictest	15596	-21	python3	10:07:16	0
31300	90	55	36,13	cyclictest	11223	-21	seq	11:38:22	0
31300	90	55	34,13	cyclictest	1197	-21	ntp_states	08:56:15	0
31300	90	55	34,12	cyclictest	12978	-21	runrttasks	08:23:53	0
31300	90	54	35,11	cyclictest	8878	2	chrt	09:09:23	0
31300	90	53	32,13	cyclictest	7589	-21	irqrtprio	12:21:05	0
31300	90	53	32,13	cyclictest	19682	-21	chrt	07:42:00	0
31300	90	53	32,12	cyclictest	30515	-21	apt-get	10:30:14	0
26589	2	53	0,2	sleep0	26590	-21	fschecks_count	09:35:51	0
12931	2	53	0,2	sleep0	12932	-21	aten2.4-expect	09:15:36	0
31300	90	52	33,11	cyclictest	1186	-21	ld	12:11:23	0
31300	90	51	33,13	cyclictest	15447	-21	ssh	11:45:14	0
31300	90	50	27,15	cyclictest	0	-21	swapper	10:14:41	0
31300	90	50	23,20	cyclictest	0	-21	swapper	07:56:27	0
29228	2	50	13,21	sleep0	29225	-21	ntpq	07:05:38	0
7927	2	47	0,3	chrt	7925	-21	/usr/sbin/munin	08:15:39	0
31300	90	47	25,15	cyclictest	0	-21	swapper	10:54:16	0
31300	90	46	8,27	cyclictest	13579	-21	apt-get	08:25:17	0
31300	90	45	30,7	cyclictest	14512	-21	sh	07:34:57	0
31300	90	41	5,17	cyclictest	25307	-21	ntp_states	07:51:12	0
31300	90	41	27,9	cyclictest	6098	-21	sshd	07:20:42	0
31300	90	40	17,15	cyclictest	0	-21	swapper	07:15:25	0
31300	90	38	5,16	cyclictest	30625	-21	diskstats	08:00:31	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2024-02-27 - 12:39