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 100 highest latencies:

System rackfslot4s.osadl.org (updated Tue Aug 04, 2026 00:44:34)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
19207	2	229	0,1	sleep0	19208	-21	seq	19:05:14	0
27735	2	121	0,2	chrt	27736	-21	sh	20:10:31	0
16628	2	120	0,3	chrt	16624	-21	memory	23:11:16	0
8538	2	117	0,3	chrt	8539	-21	/usr/sbin/munin	23:47:31	0
3542	2	117	0,3	chrt	3545	-21	sed	19:31:33	0
23425	2	117	0,2	chrt	23420	-21	df	20:55:28	0
5185	2	116	0,3	chrt	5187	-21	runrttasks	22:54:47	0
521	2	115	0,3	chrt	519	-21	ld	19:26:19	0
24860	2	114	0,2	chrt	24861	-21	runrttasks	00:12:02	0
10873	2	114	0,3	chrt	10874	-21	/usr/sbin/munin	21:26:06	0
30996	2	113	0,3	chrt	30997	-21	chrt	22:44:45	0
28983	2	113	0,2	chrt	28984	-21	fschecks_count	19:20:36	0
13164	2	113	0,3	sleep0	13166	-21	chrt	22:17:30	0
7107	2	112	0,2	sleep0	7108	-21	chrt	22:57:04	0
16852	2	111	0,2	chrt	16851	-21	basename	00:00:33	0
31404	2	110	0,3	chrt	31405	-21	sleep	21:07:42	0
21513	2	109	0,3	chrt	21509	-21	ld	00:06:58	0
9624	2	107	0,2	sleep0	9625	-21	chrt	21:24:28	0
8403	2	102	0,2	chrt	8404	-21	sleep	19:39:39	0
8654	2	98	0,2	sleep0	8656	-21	cut	22:11:07	0
10407	2	92	0,1	sleep0	10406	-21	seq	00:39:42	0
27165	2	90	0,2	chrt	27136	-21	ntpq	23:26:53	0
29004	2	89	0,2	sleep0	29005	-21	chrt	21:52:49	0
14718	2	86	0,2	sleep0	14719	-21	ssh	23:08:42	0
32633	2	84	0,2	sleep0	32634	-21	chrt	21:58:27	0
23349	2	83	0,2	chrt	23269	-21	ntp_states	22:33:00	0
407	2	81	0,2	sleep0	408	-21	seq	00:24:38	0
27260	2	81	0,1	sleep0	27261	-21	seq	22:38:48	0
17831	2	79	0,2	sleep0	17832	-21	cat	20:45:48	0
14561	2	78	0,2	sleep0	14562	-21	chrt	22:20:24	0
20064	2	76	0,2	sleep0	20066	-21	sort	21:40:05	0
9572	2	75	0,1	sleep0	9573	-21	seq	23:01:01	0
26425	2	73	0,1	sleep0	26426	-21	seq	21:49:34	0
28101	2	72	0,2	sleep0	28102	-21	ld	00:16:53	0
32257	2	71	0,2	sleep0	32260	-21	sed	22:46:08	0
1144	2	71	0,2	sleep0	1146	-21	grep	00:25:37	0
421	2	70	0,2	sleep0	418	-21	fw_packets	23:35:53	0
2090	2	69	0,2	sleep0	2088	-21	latency	20:20:48	0
1082	2	69	0,2	sleep0	1085	-21	cut	21:11:14	0
23592	2	66	0,1	sleep0	23593	-21	gcc	23:21:26	0
22187	90	66	36,12	cyclictest	7468	-21	cat	20:30:03	0
22187	90	65	34,21	cyclictest	4548	-21	ssh	00:30:44	0
22187	90	65	33,24	cyclictest	2662	-21	seq	22:02:00	0
22187	90	64	40,14	cyclictest	28943	-21	apt-get	23:30:20	0
22187	90	64	39,15	cyclictest	6246	-21	ps	22:07:23	0
22187	90	64	36,11	cyclictest	18595	-21	apt-get	23:15:46	0
22187	90	64	34,20	cyclictest	7315	-21	runrttasks	23:55:22	0
22187	90	64	32,22	cyclictest	3986	-21	perl	21:15:57	0
22187	90	64	32,13	cyclictest	19341	-21	ntp_states	19:56:17	0
22187	90	64	31,23	cyclictest	13487	-21	rm	21:30:24	0
22187	90	63	40,16	cyclictest	30481	-21	apt-get	20:15:23	0
22187	90	63	39,14	cyclictest	19473	-21	sleep	22:27:07	0
22187	90	63	38,15	cyclictest	7572	-21	apt-get	20:30:19	0
22187	90	63	37,15	cyclictest	3958	-21	ps	23:41:01	0
22187	90	63	34,20	cyclictest	22009	-21	processes	21:42:35	0
22187	90	63	33,22	cyclictest	9596	-21	apt-get	23:51:02	0
22187	90	63	32,13	cyclictest	10058	-21	ntp_states	19:41:19	0
22187	90	63	30,14	cyclictest	20667	-21	sleep	20:50:44	0
22187	90	62	36,15	cyclictest	13797	-21	apt-get	20:40:22	0
22187	90	62	31,13	cyclictest	22513	-21	chrt	20:01:23	0
22187	90	62	30,23	cyclictest	25327	-21	ntpq	20:05:54	0
22187	90	62	30,13	cyclictest	7315	-21	runrttasks	19:15:14	0
11878	2	62	0,1	sleep0	11879	-21	chrt	20:36:07	0
22187	90	61	38,13	cyclictest	12462	-21	hddtemp_smartct	19:45:54	0
22187	90	61	36,16	cyclictest	26747	-21	hddtemp_smartct	21:00:38	0
22187	90	60	39,14	cyclictest	14973	-21	sleep	19:50:16	0
22187	90	60	36,15	cyclictest	22319	-21	apt-get	19:10:13	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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