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 376 highest latencies:

System rackfslot4s.osadl.org (updated Mon Mar 16, 2026 00:44:35)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
30497	2	125	0,2	sleep0	30499	-21	sort	21:15:04	0
31988	2	122	0,2	sleep0	31992	-21	aten2.4_rfpower	22:05:36	0
31316	2	122	0,3	chrt	31314	-21	/usr/sbin/munin	23:41:00	0
20368	2	121	0,3	chrt	20361	-21	ps	22:36:03	0
15680	2	119	0,3	chrt	15682	-21	mailstats	23:17:16	0
12055	2	119	0,2	sleep0	12054	-21	seq	22:23:51	0
32268	2	118	0,2	sleep0	32267	-21	seq	22:53:45	0
28117	2	117	0,3	chrt	28118	-21	ssh	22:47:29	0
24593	2	117	0,2	sleep0	24595	-21	proc_pri	22:42:12	0
19179	2	116	0,2	chrt	19180	-21	runrttasks	22:34:38	0
20611	2	115	0,2	chrt	20612	-21	runrttasks	00:13:32	0
12796	2	115	0,2	sleep0	12797	-21	runrttasks	19:55:03	0
25068	2	114	0,2	chrt	25070	-21	cut	23:31:12	0
25057	2	114	0,3	chrt	25058	-21	sleep	21:55:26	0
19308	2	113	0,2	chrt	19311	-21	cut	21:46:08	0
2911	2	111	0,2	chrt	2910	-21	seq	22:58:15	0
27876	2	111	0,2	chrt	27877	-21	runrttasks	00:24:57	0
22208	2	110	0,1	sleep0	22230	-21	/usr/sbin/munin	00:16:03	0
14245	2	110	0,1	sleep0	14246	-21	runrttasks	00:04:11	0
29651	2	108	0,2	chrt	29652	-21	sleep	23:38:12	0
28091	2	108	0,2	chrt	28092	-21	sleep	20:19:43	0
4163	2	106	0,2	chrt	4162	-21	/usr/sbin/munin	23:00:35	0
26752	2	103	0,2	chrt	26753	-21	sh	21:09:14	0
20559	2	100	0,2	chrt	20561	-21	apt-key	23:25:11	0
1420	2	100	0,1	sleep0	1421	-21	latency_hist	21:20:06	0
10470	2	90	0,2	sleep0	10471	-21	seq	20:42:07	0
28375	2	89	0,2	sleep0	28376	-21	chrt	22:00:18	0
1876	2	89	0,2	sleep0	1877	-21	chrt	00:34:28	0
20740	2	86	0,2	sleep0	20741	-21	chrt	19:15:36	0
13613	2	86	0,1	sleep0	13614	-21	runrttasks	21:37:31	0
16456	2	83	0,2	sleep0	16457	-21	seq	21:41:52	0
11004	2	83	0,2	sleep0	11005	-21	ssh	21:34:11	0
7267	2	82	0,2	sleep0	7268	-21	chrt	23:05:22	0
3972	2	82	0,2	chrt	3941	-21	ntpq	22:11:40	0
1972	2	81	0,2	sleep0	1974	-21	ssh	23:45:48	0
15865	2	80	0,2	sleep0	15866	-21	seq	20:50:56	0
20484	2	75	0,2	sleep0	20486	-21	processes	20:06:24	0
2723	2	74	0,1	sleep0	2724	-21	df	00:35:41	0
16989	90	72	33,23	cyclictest	27051	-21	diskmemload	21:24:48	0
22290	2	70	0,2	sleep0	22292	-21	seq	21:01:12	0
6270	2	68	0,2	sleep0	6271	-21	/usr/sbin/munin	20:35:50	0
8159	2	66	0,2	sleep0	8160	-21	chrt	23:55:15	0
16989	90	66	33,23	cyclictest	6636	-21	/usr/sbin/munin	19:45:26	0
16989	90	64	32,23	cyclictest	6634	-21	df	22:16:00	0
16989	90	64	31,24	cyclictest	20833	-21	munin-run	21:00:01	0
16989	90	64	30,25	cyclictest	8024	-21	sh	21:30:01	0
16989	90	64	30,24	cyclictest	32620	-21	seq	20:25:59	0
16989	90	63	35,20	cyclictest	6689	-21	python3	23:52:20	0
16989	90	63	30,23	cyclictest	17644	-21	runrttasks	19:10:37	0
16989	90	63	30,14	cyclictest	16301	-21	df	20:00:28	0
32564	2	62	0,1	sleep0	32565	-21	apt-config	19:35:05	0
16989	90	62	35,17	cyclictest	10513	-21	apt-get	23:10:19	0
16989	90	62	34,19	cyclictest	15208	-21	df_inode	00:05:42	0
16989	90	62	29,23	cyclictest	6478	-21	munin-run	19:45:01	0
16989	90	62	29,22	cyclictest	22533	-21	ssh	21:51:10	0
16989	90	61	36,15	cyclictest	28096	-21	apt-get	00:25:19	0
16989	90	61	29,23	cyclictest	22516	-21	df	20:10:30	0
16989	90	61	29,23	cyclictest	12673	-21	munin-run	19:55:01	0
16989	90	60	35,17	cyclictest	18347	-21	ssh	23:21:17	0
16989	90	60	28,22	cyclictest	12028	-21	df	20:45:29	0
16989	90	59	32,18	cyclictest	14469	-21	ssh	22:27:13	0
16989	90	59	29,21	cyclictest	436	-21	runrttasks	19:29:20	0
16989	90	59	29,21	cyclictest	24545	-21	ntpq	19:21:05	0
16989	90	58	36,13	cyclictest	2244	-21	aten2.4_rfpower	20:30:23	0
16989	90	57	34,14	cyclictest	29304	-21	irqstats	20:20:46	0
16989	90	57	33,15	cyclictest	32484	-21	apt-get	19:35:14	0
16989	90	51	28,15	cyclictest	17006	-21	latency_hist	19:10:02	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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