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 Sat Jul 11, 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
27807	2	122	0,3	chrt	27806	-21	/usr/sbin/munin	20:36:08	0
2069	2	119	0,3	chrt	2068	-21	ld	21:36:56	0
16182	2	119	0,2	chrt	16183	-21	runrttasks	21:58:15	0
22933	2	117	0,2	chrt	22930	-21	gpgv	21:20:14	0
11687	2	115	0,2	chrt	11688	-21	/usr/sbin/munin	00:17:04	0
31445	2	114	0,3	chrt	31446	-21	chrt	22:21:05	0
7644	2	113	0,2	chrt	7643	-21	awk	23:22:26	0
22903	2	113	0,2	chrt	22904	-21	chrt	00:34:12	0
22066	2	112	0,2	sleep0	22069	-21	seq	23:44:49	0
14784	2	112	0,2	chrt	14785	-21	sh	21:06:51	0
6997	2	111	0,2	chrt	6998	-21	chrt	21:45:00	0
1928	2	111	0,4	chrt	1927	-21	seq	23:14:44	0
20665	2	109	0,2	chrt	20663	-21	awk	22:05:33	0
28955	2	108	0,3	chrt	28956	-21	latency_hist	23:55:09	0
12527	2	108	0,3	sleep0	12524	-21	aten2.4_rfpower	23:30:35	0
9057	2	107	0,2	sleep0	9061	-21	grep	21:47:18	0
26230	2	107	0,2	sleep0	26231	-21	chrt	00:39:15	0
15772	2	107	0,2	sleep0	15774	-21	cut	19:25:35	0
29560	2	105	0,2	chrt	29561	-21	sleep	19:46:56	0
21671	2	105	0,2	chrt	21673	-21	aten2.4_rfpower	19:35:23	0
9674	2	104	0,2	chrt	9675	-21	seq	00:14:45	0
11485	2	102	0,2	chrt	11486	-21	sleep	19:18:30	0
23845	2	101	0,1	sleep0	23846	-21	sh	22:58:46	0
12039	2	95	0,1	sleep0	12040	-21	cat	22:41:01	0
26721	2	94	0,2	sleep0	26722	-21	seq	22:14:37	0
30865	2	93	0,2	sleep0	30866	-21	seq	19:50:12	0
18209	2	90	0,2	sleep0	18210	-21	chrt	23:38:56	0
29309	2	89	0,2	sleep0	29310	-21	seq	21:29:43	0
16111	2	88	0,2	sleep0	16112	-21	seq	21:10:09	0
8273	2	85	0,3	chrt	7558	-21	apt-get	20:06:07	0
4163	2	83	0,1	sleep0	4164	-21	cat	00:06:05	0
25403	2	82	0,2	sleep0	25404	-21	seq	23:49:51	0
17409	2	81	0,1	sleep0	17412	-21	aten2.4_rfpower	20:20:24	0
30129	2	80	0,2	sleep0	30130	-21	basename	23:56:42	0
11121	2	77	0,2	sleep0	11122	-21	chrt	20:10:23	0
25416	2	75	0,2	sleep0	25414	-21	irqrtprio	23:01:04	0
2888	2	73	11,47	sleep0	2857	-21	apt-get	19:05:15	0
30813	2	72	0,2	sleep0	30816	-21	sort	21:31:16	0
12245	2	72	0,2	sleep0	12246	-21	seq	19:20:12	0
20951	2	67	0,2	sleep0	20937	-21	ntpq	21:16:47	0
7623	2	65	0,1	sleep0	7624	-21	latency_hist	20:05:05	0
14779	2	65	0,2	sleep0	14782	-21	sed	00:21:24	0
23331	2	60	0,1	sleep0	23332	-21	chrt	20:30:02	0
8237	2	57	4,8	sleep0	8234	-21	ntpq	20:56:53	0
16805	2	56	0,2	sleep0	16813	-21	apt-get	00:25:11	0
1951	2	55	0,2	sleep0	1953	-21	grep	19:55:34	0
5868	90	54	21,16	cyclictest	0	-21	swapper	20:50:31	0
18453	2	52	3,8	sleep0	18441	-21	apt-get	19:30:14	0
28683	2	49	0,2	sleep0	28684	-21	chrt	23:06:01	0
25857	2	48	3,6	sleep0	25871	-21	ntpq	19:41:07	0
5868	90	47	18,21	cyclictest	0	-21	swapper	23:18:28	0
5868	90	47	13,8	cyclictest	0	-21	swapper	20:48:06	0
30331	2	47	0,1	sleep0	30380	-21	if_eth2	20:40:43	0
14717	2	46	2,7	sleep0	14714	-21	ssh	22:45:29	0
5868	90	45	15,23	cyclictest	0	-21	swapper	22:18:47	0
5868	90	45	13,26	cyclictest	10445	-21	ssh	22:38:31	0
13558	2	45	3,35	sleep0	13555	-21	ssh	21:54:57	0
5868	90	43	6,18	cyclictest	2428	-21	memory	22:26:11	0
5868	90	43	14,21	cyclictest	0	-21	swapper	22:52:37	0
5868	90	43	14,20	cyclictest	0	-21	swapper	22:00:10	0
5868	90	43	12,23	cyclictest	0	-21	swapper	00:02:36	0
5868	90	42	5,28	cyclictest	6178	-21	ntpq	22:31:55	0
14466	2	42	0,1	sleep0	14467	-21	seq	20:15:26	0
5868	90	41	16,19	cyclictest	11198	-21	sleep	21:01:16	0
5868	90	40	16,17	cyclictest	8904	-21	apt-get	23:25:29	0
5868	90	39	7,11	cyclictest	23481	-21	apt-get	20:30:19	0
5868	90	39	17,15	cyclictest	6568	-21	/usr/sbin/munin	19:10:39	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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