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 Tue Sep 08, 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
10519	2	120	0,2	sleep0	10520	-21	chrt	22:12:09	0
3708	2	119	0,2	chrt	3707	-21	seq	23:39:37	0
1685	2	119	0,2	sleep0	1686	-21	seq	21:10:46	0
14478	2	118	0,2	chrt	14479	-21	runrttasks	22:18:04	0
12068	2	117	0,2	chrt	12069	-21	runrttasks	23:02:36	0
31280	2	115	0,3	chrt	31277	-21	ld	23:31:37	0
15156	2	115	0,3	chrt	15157	-21	/usr/sbin/munin	23:07:20	0
7922	2	114	0,2	chrt	7921	-21	seq	22:56:28	0
26041	2	113	0,2	chrt	26042	-21	sh	22:35:40	0
17229	2	113	0,2	sleep0	17230	-21	seq	21:33:32	0
26249	2	112	0,2	chrt	26250	-21	chrt	00:12:54	0
32687	2	110	0,3	chrt	32689	-21	timerwakeupswit	00:22:22	0
5838	2	107	0,2	sleep0	5839	-21	chrt	22:53:38	0
7898	2	106	0,3	chrt	7899	-21	runrttasks	22:08:12	0
20781	2	105	0,1	sleep0	20784	-21	mailstats	19:56:26	0
6136	2	102	0,2	sleep0	6137	-21	seq	23:42:26	0
20868	2	100	0,3	sleep0	20869	-21	seq	19:05:21	0
17711	2	100	0,2	sleep0	17713	-21	sort	23:11:13	0
9673	2	96	0,2	sleep0	9674	-21	seq	19:39:44	0
24883	2	95	0,2	sleep0	24885	-21	chrt	19:10:59	0
19619	2	92	0,2	sleep0	19620	-21	chrt	00:02:54	0
19785	2	91	0,2	sleep0	19787	-21	processes	21:37:14	0
22493	2	84	0,3	sleep0	22495	-21	cut	20:00:23	0
5054	2	83	0,2	sleep0	5053	-21	head	00:30:35	0
8848	2	82	0,2	sleep0	8850	-21	rm	23:46:43	0
4720	2	81	0,1	sleep0	4722	-21	awk	21:15:13	0
28003	2	81	0,2	sleep0	28004	-21	chrt	21:00:41	0
21290	2	80	0,2	sleep0	21291	-21	chrt	22:28:26	0
2791	2	77	0,2	sleep0	2794	-21	chrt	20:20:34	0
30627	2	74	0,2	sleep0	30628	-21	seq	21:05:22	0
24316	2	74	0,2	sleep0	24317	-21	seq	20:55:08	0
31159	2	72	0,3	sleep0	31160	-21	chrt	21:55:00	0
21641	2	72	0,2	sleep0	21644	-21	wc	23:17:13	0
29097	2	71	0,2	sleep0	29098	-21	seq	23:28:36	0
24603	2	71	0,2	sleep0	24604	-21	gcc	23:21:31	0
18759	2	69	0,2	sleep0	18755	-21	if_eth0	20:45:41	0
32566	2	68	0,2	sleep0	32567	-21	sh	22:45:30	0
5448	2	62	0,1	sleep0	5449	-21	seq	20:25:04	0
17181	2	61	0,2	sleep0	17176	-21	sh	00:00:01	0
4571	2	60	0,2	sleep0	4577	-21	chrt	00:29:46	0
25641	2	60	0,1	sleep0	25645	-21	irqrtprio	21:46:04	0
20700	2	60	0,2	sleep0	20701	-21	chrt	00:05:12	0
16951	2	59	0,1	sleep0	16953	-21	cut	19:50:45	0
11952	2	57	0,2	sleep0	11956	-21	fschecks_time	21:25:49	0
16051	2	54	0,1	sleep0	16054	-21	chrt	19:50:02	0
10468	2	54	3,7	sleep0	10473	-21	chrt	21:23:15	0
31019	2	53	3,43	sleep0	31020	-21	ssh	22:42:44	0
2068	2	53	3,7	sleep0	2072	-21	chrt	20:19:43	0
9399	2	52	0,2	sleep0	9402	-21	cut	20:30:44	0
28688	2	52	3,39	sleep0	7315	-21	runrttasks	20:10:24	0
12937	2	51	2,5	sleep0	0	-21	swapper	23:52:52	0
26967	2	50	0,2	sleep0	26970	-21	sendmail_mailst	20:06:25	0
5082	2	48	0,1	sleep0	5083	-21	seq	22:04:24	0
23652	90	47	17,24	cyclictest	0	-21	swapper	22:34:03	0
29062	2	45	0,2	chrt	29058	-21	ps	00:17:11	0
15536	2	45	4,34	sleep0	15512	-21	apt-get	22:20:16	0
23652	90	43	5,10	cyclictest	11183	-21	ntpq	19:41:07	0
23652	90	43	4,10	cyclictest	4648	-21	irqstats	19:30:45	0
31763	2	42	3,32	sleep0	31765	-21	ssh	21:55:42	0
23652	90	42	6,27	cyclictest	21495	-21	sleep	21:40:29	0
23652	90	42	15,9	cyclictest	412	-21	snmpd	00:39:14	0
23652	90	41	6,19	cyclictest	31232	-21	ntpq	19:21:07	0
23652	90	41	5,17	cyclictest	1777	-21	ntpq	19:25:59	0
23652	90	40	4,16	cyclictest	16317	-21	memory	20:41:41	0
23652	90	40	4,10	cyclictest	12965	-21	ntpq	20:36:15	0
23652	90	40	3,19	cyclictest	21578	-21	df_inode	20:50:29	0
23652	90	39	5,16	cyclictest	28186	-21	sshd	19:16:17	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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