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 Sat Sep 19, 2026 12:44:34)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
21773	2	123	0,3	chrt	21766	-21	hddtemp_smartct	10:55:58	0
22107	2	118	0,2	chrt	22108	-21	sleep	12:33:56	0
4037	2	117	0,2	sleep0	4036	-21	ls	12:06:15	0
27231	2	117	0,3	chrt	27232	-21	aten2.4_rfpower	10:15:35	0
17453	2	117	0,2	chrt	17446	-21	ntpq	12:26:29	0
11719	2	117	0,4	chrt	11720	-21	fschecks_count	10:40:52	0
9249	2	116	0,2	chrt	8999	-21	apt-get	07:15:55	0
22983	2	116	0,2	chrt	22984	-21	sh	10:08:47	0
22241	2	116	0,3	chrt	22239	-21	/usr/sbin/munin	07:35:33	0
21082	2	116	0,3	chrt	21077	-21	ntpq	09:17:16	0
12850	2	116	0,2	chrt	12849	-21	seq	09:05:07	0
1026	2	115	0,2	sleep0	1031	-21	idleruntime-cro	10:24:59	0
18136	2	114	0,2	sleep0	18137	-21	chrt	09:12:39	0
26191	2	112	0,1	sleep0	26192	-21	chrt	10:13:33	0
20664	2	112	0,3	chrt	20665	-21	sleep	10:54:24	0
1289	2	112	0,2	chrt	1285	-21	ps	12:02:13	0
7224	2	111	0,2	chrt	7225	-21	uname	12:11:09	0
17730	2	110	0,2	chrt	17731	-21	cut	10:50:04	0
14693	2	110	0,3	chrt	14696	-21	irqrtprio	09:56:06	0
10106	2	110	0,3	chrt	10107	-21	sh	10:37:59	0
32732	2	108	0,3	chrt	32733	-21	modprobe	09:35:10	0
11646	2	108	0,3	chrt	11647	-21	sh	12:17:41	0
11117	2	108	0,3	chrt	11118	-21	sh	11:28:33	0
14627	2	106	0,3	chrt	14629	-21	mailstats	12:22:12	0
4693	2	105	0,2	sleep0	4695	-21	chrt	11:19:08	0
28204	2	105	0,1	sleep0	28206	-21	sh	11:54:22	0
14196	2	104	0,2	sleep0	14197	-21	seq	08:15:03	0
10588	2	104	0,2	chrt	10589	-21	sleep	08:08:58	0
20980	2	103	0,3	chrt	20981	-21	sleep	07:33:07	0
14102	2	99	0,2	chrt	14103	-21	sh	07:22:25	0
28637	2	97	0,2	sleep0	28638	-21	chrt	09:28:41	0
7431	2	95	0,2	chrt	7432	-21	sh	08:03:48	0
18620	2	92	0,2	sleep0	18621	-21	ssh	10:01:55	0
26575	2	83	0,2	sleep0	26576	-21	cat	07:41:28	0
5520	2	82	0,1	sleep0	5522	-21	processes	09:42:11	0
32583	2	81	0,1	sleep0	32584	-21	chrt	09:35:03	0
29349	2	81	0,2	sleep0	29350	-21	ntp_states	11:06:57	0
1792	2	80	0,2	sleep0	1794	-21	chrt	11:15:03	0
9960	2	75	0,2	sleep0	9961	-21	chrt	09:49:24	0
483	2	75	0,2	sleep0	484	-21	chrt	08:45:17	0
15922	2	75	0,2	sleep0	15923	-21	aten2.4_rfpower	07:26:16	0
7918	2	73	0,2	sleep0	7919	-21	seq	08:56:13	0
5535	90	72	5,55	cyclictest	23301	-21	ntpq	11:46:23	0
5535	90	72	4,58	cyclictest	6710	-21	ntpq	07:10:54	0
31704	2	72	0,2	sleep0	31706	-21	seq	11:59:51	0
23613	2	72	0,2	sleep0	23616	-21	sed	12:36:05	0
5535	90	71	12,50	cyclictest	16800	-21	ntpq	11:36:57	0
5535	90	70	7,51	cyclictest	1826	-21	apt-get	07:55:18	0
5535	90	70	6,55	cyclictest	24032	-21	ssh	09:21:31	0
5535	90	70	5,45	cyclictest	12255	-21	runrttasks	11:30:39	0
19193	2	70	0,1	sleep0	19194	-21	hostname	11:40:53	0
1691	2	70	0,2	sleep0	1736	-21	grep	10:25:48	0
5535	90	69	4,54	cyclictest	11151	-21	/usr/sbin/munin	08:10:26	0
5535	90	69	11,49	cyclictest	12704	-21	apt	09:05:00	0
5535	90	68	5,53	cyclictest	5986	-21	ntpq	10:31:46	0
5535	90	68	5,52	cyclictest	32217	-21	seq	07:50:52	0
5535	90	68	5,45	cyclictest	12303	-21	ssh	09:52:17	0
5535	90	68	15,44	cyclictest	21158	-21	if_eth2	08:25:43	0
5535	90	68	14,45	cyclictest	26323	-21	ssh	11:02:18	0
5535	90	67	4,52	cyclictest	5706	-21	ssh	11:20:40	0
5535	90	67	4,45	cyclictest	27988	-21	runrttasks	08:36:17	0
5535	90	66	7,49	cyclictest	31123	-21	ntp_states	08:41:19	0
5535	90	66	6,50	cyclictest	3550	-21	apt-get	08:50:19	0
5535	90	65	5,50	cyclictest	23582	-21	apt-get	08:30:19	0
5535	90	65	4,51	cyclictest	17396	-21	apt-get	08:20:24	0
5535	90	65	4,50	cyclictest	28253	-21	aten2.4_rfpower	07:45:26	0
5535	90	58	5,45	cyclictest	5487	-21	latency_hist	07:10:03	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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