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 Sat Aug 08, 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
437	2	127	0,2	chrt	442	-21	timerandwakeup	10:47:20	0
5956	2	122	0,2	chrt	5957	-21	awk	10:07:06	0
8744	2	119	0,3	chrt	8745	-21	chrt	08:31:12	0
2409	2	117	0,3	chrt	2410	-21	runrttasks	12:27:58	0
9053	2	116	0,2	chrt	9028	-21	munin-run	11:50:04	0
19056	2	115	0,2	sleep0	19057	-21	seq	11:15:56	0
28789	2	113	0,2	chrt	28488	-21	apt-get	07:21:05	0
4899	2	112	0,2	chrt	4900	-21	sleep	10:54:55	0
19341	2	112	0,2	chrt	19342	-21	dpkg	12:05:17	0
26975	2	111	0,2	chrt	26973	-21	aten2.4_rfpower	09:50:37	0
17339	2	111	0,2	chrt	17338	-21	sshd	12:01:47	0
15608	2	111	0,2	sleep0	15609	-21	chrt	12:00:00	0
30292	2	109	0,2	chrt	30293	-21	seq	10:43:52	0
31359	2	107	0,2	chrt	31360	-21	chrt	11:34:42	0
8834	2	106	0,2	chrt	8833	-21	grep	11:00:36	0
25906	2	106	0,2	chrt	25907	-21	runrttasks	09:48:41	0
16601	2	103	0,1	sleep0	16603	-21	ntp_offset	11:11:48	0
10677	2	98	0,2	sleep0	10680	-21	ntp_offset	11:51:47	0
22689	2	95	0,2	sleep0	22693	-21	sed	11:21:07	0
4182	2	93	0,2	sleep0	4186	-21	sed	09:16:07	0
28239	2	92	0,2	sleep0	28240	-21	irqrtprio	08:10:45	0
11424	2	90	0,2	sleep0	11423	-21	ntpq	09:26:44	0
2019	2	88	0,2	sleep0	2020	-21	seq	09:12:38	0
18098	2	88	0,2	sleep0	18099	-21	sh	10:25:38	0
19536	2	86	12,56	sleep0	19576	-21	ntpq	07:05:33	0
8930	2	83	0,1	sleep0	8929	-21	seq	10:11:16	0
29562	2	76	0,2	sleep0	29561	-21	seq	09:05:28	0
2616	2	74	0,1	sleep0	2615	-21	seq	11:40:17	0
26622	2	72	0,2	sleep0	26623	-21	hddtemp_smartct	12:16:01	0
13618	2	71	0,2	sleep0	13674	-21	awk	09:30:39	0
23964	2	68	0,2	sleep0	23965	-21	seq	10:34:39	0
25948	2	67	0,2	sleep0	25951	-21	sed	11:26:06	0
14038	2	67	0,2	sleep0	14039	-21	chrt	08:40:28	0
13694	2	59	0,2	sleep0	13695	-21	seq	10:18:53	0
3483	2	58	0,1	sleep0	3484	-21	sshd	10:03:39	0
14841	2	58	0,2	sleep0	14842	-21	seq	07:50:10	0
5201	2	57	0,1	sleep0	5202	-21	cat	07:35:02	0
21669	90	57	26,23	cyclictest	13457	-21	runrttasks	11:07:08	0
21669	90	57	25,23	cyclictest	32164	-21	diskmemload	10:36:15	0
21669	90	56	26,22	cyclictest	2231	-21	latency	08:20:48	0
21669	90	56	26,22	cyclictest	17106	-21	ssh	10:24:05	0
21669	90	56	25,13	cyclictest	21275	-21	ntpq	09:41:27	0
21669	90	56	24,23	cyclictest	16804	-21	/usr/sbin/munin	08:46:02	0
21669	90	54	32,13	cyclictest	9344	-21	chrt	07:40:48	0
21669	90	53	27,15	cyclictest	17956	-21	apt-get	07:55:17	0
21669	90	53	26,21	cyclictest	3431	-21	ssh	12:30:10	0
21669	90	53	22,22	cyclictest	9778	-21	munin-run	09:25:03	0
21669	90	53	22,22	cyclictest	17995	-21	ntpq	09:36:37	0
21669	90	53	22,21	cyclictest	439	-21	sh	12:10:34	0
21669	90	53	22,13	cyclictest	11881	-21	runrttasks	08:36:16	0
21669	90	53	21,23	cyclictest	1781	-21	sshd	11:38:38	0
21669	90	53	20,24	cyclictest	30676	-21	ntpq	12:21:37	0
7615	2	52	0,2	sleep0	7618	-21	cut	12:36:04	0
21669	90	52	22,21	cyclictest	1957	-21	sleep	07:29:51	0
21669	90	51	31,12	cyclictest	22794	-21	runrttasks	08:54:57	0
21669	90	51	30,14	cyclictest	22054	-21	fschecks_time	08:01:26	0
21669	90	51	28,14	cyclictest	7392	-21	ssh	10:57:57	0
21669	90	51	27,14	cyclictest	4378	-21	apt-get	08:25:17	0
21669	90	51	22,21	cyclictest	26428	-21	ntpq	07:16:20	0
21669	90	51	21,22	cyclictest	492	-21	sh	09:59:35	0
21669	90	51	21,21	cyclictest	11763	-21	apt-get	07:45:18	0
21669	90	51	20,22	cyclictest	5371	-21	sleep	07:35:21	0
21669	90	51	20,22	cyclictest	24445	-21	sshd	08:05:20	0
21669	90	51	19,24	cyclictest	21611	-21	apt-get	07:10:31	0
21669	90	50	25,13	cyclictest	30612	-21	apt-get	08:15:16	0
21669	90	50	20,22	cyclictest	26828	-21	grep	09:00:45	0
21669	90	49	19,22	cyclictest	24061	-21	ntpq	08:55:54	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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