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 Jan 12, 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
24882	2	137	0,2	sleep0	24883	-21	seq	23:29:14	0
18049	2	128	0,3	chrt	18035	-21	ntp_states	21:42:08	0
31773	2	119	0,2	chrt	31774	-21	runrttasks	20:21:39	0
21394	2	119	0,2	sleep0	21395	-21	sh	23:23:50	0
31645	2	117	0,3	chrt	31643	-21	ntpq	22:02:21	0
18679	2	117	0,3	chrt	18676	-21	ntpq	20:00:53	0
26545	2	114	0,2	chrt	26544	-21	/usr/sbin/munin	21:05:48	0
25978	2	114	0,2	chrt	25976	-21	ld	22:41:36	0
10964	2	114	0,1	sleep0	10965	-21	runrttasks	22:20:10	0
3378	2	113	0,2	chrt	3379	-21	seq	00:33:30	0
5156	2	110	0,3	chrt	5155	-21	sshd	21:22:45	0
3746	2	110	0,2	chrt	3747	-21	collect2	22:57:07	0
27971	2	109	0,3	chrt	27972	-21	sleep	22:45:20	0
25123	2	109	0,1	sleep0	25125	-21	processes	00:17:15	0
20496	2	109	0,2	chrt	20494	-21	sshd	19:12:55	0
11568	2	109	0,2	chrt	11569	-21	sleep	20:41:30	0
17312	2	108	0,3	chrt	17313	-21	runrttasks	22:29:24	0
8753	2	107	0,2	chrt	8754	-21	sleep	20:37:01	0
7607	2	107	0,1	sleep0	7608	-21	runrttasks	22:15:09	0
26176	2	107	0,1	sleep0	26177	-21	runrttasks	21:54:53	0
26162	2	107	0,2	chrt	26163	-21	sleep	20:13:25	0
985	2	106	0,2	chrt	986	-21	seq	22:05:15	0
20707	2	106	0,3	chrt	20708	-21	seq	22:34:35	0
31857	2	99	0,2	sleep0	31858	-21	seq	21:15:01	0
25459	2	97	0,2	sleep0	25460	-21	date	21:05:02	0
10358	2	95	0,1	sleep0	10361	-21	cut	23:55:55	0
32525	2	93	0,2	sleep0	32527	-21	chrt	00:28:30	0
31819	2	93	0,2	sleep0	31820	-21	ssh	23:39:57	0
5458	2	91	0,2	sleep0	5459	-21	chrt	23:00:13	0
13236	2	89	0,2	sleep0	13237	-21	basename	21:35:34	0
21856	2	87	0,2	sleep0	21857	-21	cat	00:12:17	0
21167	2	87	0,2	sleep0	21168	-21	apt-config	22:35:11	0
5525	2	86	0,1	sleep0	5526	-21	seq	23:48:22	0
17488	2	84	0,2	sleep0	17489	-21	seq	20:51:10	0
9093	2	82	0,2	sleep0	9094	-21	chrt	23:53:58	0
10479	2	82	0,2	sleep0	10477	-21	open_files	23:07:13	0
15652	2	76	0,1	sleep0	15654	-21	ls	00:03:12	0
31693	2	74	0,1	sleep0	31696	-21	sed	19:30:42	0
15833	2	73	0,1	sleep0	15834	-21	chrt	23:15:42	0
4460	2	72	0,2	sleep0	4462	-21	awk	22:10:32	0
4732	2	69	0,2	sleep0	4733	-21	fschecks_count	00:35:51	0
17305	2	69	0,2	sleep0	17308	-21	sort	00:05:53	0
27865	2	66	0,2	sleep0	27867	-21	seq	23:33:26	0
1641	2	63	0,2	sleep0	1642	-21	chrt	23:42:41	0
12261	2	60	0,1	sleep0	12262	-21	chrt	21:33:43	0
13869	2	56	0,2	sleep0	13872	-21	cut	20:45:42	0
7368	2	54	0,2	sleep0	7372	-21	sed	21:26:09	0
29097	2	54	0,2	sleep0	29098	-21	ssh	21:58:53	0
32450	2	52	0,1	sleep0	32451	-21	cpuspeed	21:15:40	0
9341	2	51	0,2	sleep0	9342	-21	seq	19:46:12	0
16235	2	51	14,20	sleep0	16238	-21	ntpq	19:05:45	0
27897	2	50	0,2	sleep0	27898	-21	rm	19:25:12	0
21639	2	49	0,1	sleep0	21640	-21	runrttasks	21:47:22	0
19382	2	49	0,1	sleep0	19385	-21	runrttasks	20:55:18	0
21396	2	48	0,2	sleep0	21397	-21	runrttasks	19:15:07	0
18196	90	48	18,23	cyclictest	0	-21	swapper	00:24:16	0
32304	2	46	0,1	sleep0	32308	-21	kernelversion	22:51:11	0
29182	2	43	0,3	sleep0	29178	-21	sshd	20:18:10	0
18196	90	43	20,16	cyclictest	0	-21	swapper	23:14:46	0
12738	2	43	0,2	chrt	12736	-21	grep	19:51:27	0
18196	90	42	4,12	cyclictest	3167	-21	/usr/sbin/munin	19:36:41	0
1178	2	41	0,2	sleep0	1179	-21	cut	20:25:37	0
18196	90	40	4,17	cyclictest	15146	-21	df_inode	19:56:21	0
18196	90	38	4,16	cyclictest	412	-21	snmpd	19:43:27	0
18196	90	38	12,19	cyclictest	0	-21	swapper	20:30:24	0
21263	2	37	0,1	sleep0	21282	-21	basename	20:05:41	0
18196	90	37	6,12	cyclictest	24912	-21	df_inode	19:20:31	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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