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
Special All - All RT - Optimization - Ethernet - Thumbnails - Next

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 792 highest latencies:

System rackfslot4s.osadl.org (updated Thu Nov 20, 2025 00:44:33)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
16556	2	122	0,2	chrt	16550	-21	diskstats	22:10:42	0
8789	2	118	0,2	chrt	8787	-21	mailstats	19:53:53	0
26295	2	115	0,3	chrt	26297	-21	/usr/sbin/munin	20:26:27	0
17441	2	115	0,2	chrt	17442	-21	sh	00:07:44	0
2371	2	114	0,2	chrt	2375	-21	sendmail	00:40:01	0
2036	2	112	0,2	chrt	2037	-21	sleep	23:40:48	0
5167	2	110	0,2	sleep0	5168	-21	irqrtprio	23:46:08	0
19111	2	108	0,2	sleep0	19113	-21	irqrtprio	00:11:04	0
1827	2	106	0,3	chrt	1828	-21	sleep	20:43:01	0
358	2	104	0,3	chrt	359	-21	sh	19:25:38	0
21816	2	103	0,3	chrt	21817	-21	cat	23:17:17	0
32650	2	101	0,3	chrt	32652	-21	latency_hist	19:25:02	0
3186	2	101	0,2	chrt	3187	-21	sleep	19:36:25	0
27041	2	91	0,2	sleep0	27042	-21	basename	21:30:57	0
14942	2	81	0,1	sleep0	14944	-21	cut	23:05:52	0
6746	2	73	0,2	sleep0	6747	-21	grep	19:50:02	0
22304	2	73	0,2	sleep0	22306	-21	sh	22:20:55	0
23798	2	71	0,2	sleep0	23800	-21	cut	23:21:03	0
1741	2	69	0,1	sleep0	1742	-21	collect2	22:41:32	0
28602	90	68	40,10	cyclictest	27235	-21	ssh	00:25:56	0
28602	90	68	33,23	cyclictest	13413	-21	apt-get	22:05:31	0
28602	90	67	37,20	cyclictest	20389	-21	ntpq	22:17:06	0
28602	90	67	34,23	cyclictest	4082	-21	sleep	21:47:20	0
28602	90	67	34,13	cyclictest	10564	-21	ntpq	19:56:15	0
28602	90	67	32,21	cyclictest	13951	-21	ntpq	00:01:26	0
28602	90	66	34,21	cyclictest	11869	-21	ntpq	22:01:36	0
28602	90	66	33,23	cyclictest	23882	-21	/usr/sbin/munin	00:20:33	0
28602	90	66	33,18	cyclictest	30784	-21	ntp_states	00:31:58	0
28602	90	66	33,13	cyclictest	30919	-21	if_eth2	22:36:02	0
28602	90	66	33,13	cyclictest	14239	-21	munin-run	23:05:05	0
28602	90	66	32,24	cyclictest	28349	-21	latency_hist	23:30:04	0
28602	90	65	36,20	cyclictest	25179	-21	perl	22:25:49	0
28602	90	65	35,11	cyclictest	23439	-21	ntpq	20:21:14	0
28602	90	65	33,23	cyclictest	29215	-21	/usr/sbin/munin	21:36:57	0
28602	90	65	33,22	cyclictest	18087	-21	ntpq	20:11:08	0
28602	90	65	32,23	cyclictest	3495	-21	aten2.4_rfpower	22:45:32	0
28602	90	64	38,17	cyclictest	734	-21	ntpq	21:41:28	0
28602	90	64	35,18	cyclictest	28440	-21	apt-get	23:30:20	0
28602	90	64	33,23	cyclictest	22252	-21	ssh	00:16:26	0
28602	90	64	33,21	cyclictest	869	-21	snmpd	20:05:02	0
28602	90	64	32,13	cyclictest	21985	-21	ntpq	21:21:15	0
28602	90	64	31,23	cyclictest	11207	-21	ntpq	23:56:35	0
28602	90	63	41,13	cyclictest	14986	-21	munin-plugin-st	21:10:00	0
28602	90	63	38,17	cyclictest	27443	-21	apt-get	22:30:20	0
28602	90	63	38,15	cyclictest	31200	-21	apt-get	23:35:25	0
28602	90	63	37,16	cyclictest	10080	-21	apt-get	21:00:21	0
28602	90	63	35,20	cyclictest	5972	-21	ntpq	20:50:55	0
28602	90	63	33,22	cyclictest	24059	-21	df	21:25:44	0
28602	90	63	32,12	cyclictest	19351	-21	apt-get	20:16:01	0
28602	90	63	31,14	cyclictest	16444	-21	runrttasks	21:11:48	0
28602	90	63	30,13	cyclictest	10046	-21	ntpq	22:56:33	0
28602	90	63	29,14	cyclictest	15042	-21	/usr/sbin/munin	20:05:41	0
28602	90	62	39,14	cyclictest	18536	-21	/usr/sbin/munin	23:11:31	0
28602	90	62	39,13	cyclictest	3441	-21	ntpq	20:45:51	0
28602	90	62	37,15	cyclictest	18021	-21	apt-get	21:15:27	0
28602	90	62	32,21	cyclictest	5439	-21	df	21:50:39	0
28602	90	62	31,22	cyclictest	869	-21	snmpd	23:51:31	0
28602	90	62	30,22	cyclictest	6923	-21	sed	22:51:02	0
28602	90	61	33,20	cyclictest	28611	-21	latency_hist	19:10:02	0
28602	90	61	31,21	cyclictest	8776	-21	irqstats	21:56:06	0
28602	90	61	31,21	cyclictest	27650	-21	runrttasks	20:30:32	0
28602	90	61	28,15	cyclictest	8870	-21	python3	20:56:22	0
28602	90	60	32,18	cyclictest	5398	-21	latency_hist	19:45:03	0
28602	90	60	28,23	cyclictest	30883	-21	ntpq	20:35:59	0
28602	90	60	27,10	cyclictest	29888	-21	modprobe	19:15:00	0
28602	90	59	37,13	cyclictest	2770	-21	ls	19:35:02	0
28602	90	56	35,13	cyclictest	31264	-21	lockfile-create	19:20:00	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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