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 all highest latencies:

System rackfslot4s.osadl.org (updated Thu Aug 27, 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
2178	2	129	0,3	chrt	886	-21	/usr/sbin/munin	10:16:26	0
31111	2	121	0,2	chrt	31115	-21	mailstats	09:22:52	0
27872	2	120	0,2	sleep0	27871	-21	seq	09:17:51	0
21816	2	120	0,2	sleep0	21815	-21	seq	12:22:49	0
13226	2	120	0,2	chrt	12856	-21	apt-get	12:10:44	0
27974	2	117	0,3	chrt	27975	-21	chrt	07:35:18	0
18843	2	116	0,3	chrt	18839	-21	ps	09:53:03	0
10016	2	115	0,2	chrt	10015	-21	seq	10:28:27	0
18467	2	114	0,2	chrt	18466	-21	cut	11:30:05	0
3019	2	113	0,1	sleep0	3020	-21	aten2.4_rfpower	11:55:33	0
7163	2	112	0,2	chrt	7162	-21	grep	08:45:34	0
30060	2	111	0,2	chrt	30061	-21	seq	12:35:49	0
24522	2	110	0,2	chrt	24523	-21	chrt	11:38:54	0
21544	2	110	0,3	chrt	21542	-21	cpuspeed	10:45:58	0
11101	2	109	0,2	chrt	11103	-21	cut	10:30:34	0
23407	2	108	0,2	chrt	23408	-21	sleep	10:00:10	0
22428	2	108	0,1	sleep0	22430	-21	sh	09:10:32	0
21797	2	107	0,3	chrt	21798	-21	cut	11:35:05	0
14082	2	107	0,2	chrt	14083	-21	sh	08:56:01	0
10917	2	107	0,2	chrt	10918	-21	sleep	07:59:45	0
20635	2	105	0,2	chrt	20636	-21	sleep	07:22:28	0
15282	2	104	0,3	chrt	15283	-21	sh	07:14:57	0
4400	2	103	0,2	chrt	4401	-21	sleep	07:49:27	0
25740	2	94	0,2	sleep0	25741	-21	sh	10:51:42	0
19563	2	94	0,2	sleep0	19567	-21	uniq	09:05:34	0
6616	2	86	0,2	sleep0	6615	-21	seq	07:52:07	0
11916	2	81	0,1	sleep0	11917	-21	seq	11:20:10	0
30587	2	80	0,3	sleep0	30588	-21	grep	10:10:51	0
2550	2	80	0,1	sleep0	2551	-21	seq	11:54:47	0
9942	2	79	0,2	sleep0	9943	-21	chrt	12:05:43	0
31805	2	79	0,1	sleep0	31806	-21	latency_hist	11:50:09	0
14398	2	79	0,1	sleep0	14399	-21	chrt	08:05:21	0
18671	2	77	0,2	sleep0	18669	-21	ls	10:41:13	0
12059	90	76	13,18	cyclictest	0	-21	swapper	09:38:59	0
12059	90	75	4,27	cyclictest	1535	-21	ntp_states	09:27:06	0
12059	90	75	20,22	cyclictest	0	-21	swapper	10:09:44	0
24829	2	74	0,1	sleep0	24830	-21	cat	12:27:19	0
2127	2	74	0,2	sleep0	2128	-21	hostname	11:05:31	0
16479	2	74	0,2	sleep0	16480	-21	seq	07:15:49	0
12059	90	74	6,10	cyclictest	5268	-21	irqstats	10:21:08	0
27895	2	73	0,2	sleep0	27896	-21	seq	12:32:07	0
15164	2	73	0,3	sleep0	15165	-21	chrt	09:47:21	0
18542	2	72	0,2	sleep0	18543	-21	seq	12:17:57	0
12059	90	71	15,22	cyclictest	0	-21	swapper	10:38:41	0
12059	90	71	11,20	cyclictest	28633	-21	irqstats	10:56:07	0
12059	90	70	4,17	cyclictest	5087	-21	grep	08:41:24	0
12059	90	70	13,17	cyclictest	22102	-21	diskmemload	09:44:31	0
24870	2	69	0,2	sleep0	24871	-21	seq	07:30:18	0
27136	2	64	0,2	sleep0	27137	-21	seq	08:25:32	0
21012	2	64	0,2	sleep0	21014	-21	fschecks_time	08:15:36	0
8220	2	56	0,2	sleep0	8219	-21	seq	11:14:37	0
5509	2	56	0,2	sleep0	5510	-21	chrt	09:32:59	0
717	2	55	0,2	sleep0	714	-21	ps	11:03:01	0
26832	2	55	0,2	sleep0	26833	-21	seq	11:42:02	0
10649	2	55	6,37	sleep0	0	-21	swapper	07:06:21	0
12059	90	49	18,22	cyclictest	0	-21	swapper	11:18:06	0
917	2	47	0,2	chrt	916	-21	seq	08:35:32	0
12059	90	46	17,22	cyclictest	0	-21	swapper	12:04:52	0
12059	90	46	13,15	cyclictest	0	-21	swapper	08:22:44	0
1026	2	44	0,3	chrt	1027	-21	sh	07:43:41	0
22759	2	43	0,3	chrt	22760	-21	seq	09:58:58	0
19821	2	42	0,2	sleep0	19822	-21	sleep	08:13:32	0
12059	90	42	5,18	cyclictest	10888	-21	ntpq	08:50:53	0
12059	90	40	4,18	cyclictest	31176	-21	ntp_states	08:31:17	0
12059	90	39	14,19	cyclictest	17413	-21	ntpq	09:01:21	0
12059	90	39	14,19	cyclictest	11239	-21	apt-get	08:00:20	0
12059	90	39	12,10	cyclictest	22598	-21	irqrtprio	07:25:44	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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