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 Aug 04, 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
26719	2	131	0,3	chrt	26720	-21	sleep	10:27:00	0
21726	2	126	0,2	sleep0	21727	-21	seq	11:57:06	0
22581	2	123	0,2	chrt	22582	-21	sh	11:10:12	0
15047	2	121	0,2	sleep0	15117	-21	load	09:21:13	0
7781	2	119	0,2	sleep0	7816	-21	cut	09:10:56	0
13982	2	119	0,3	chrt	13981	-21	ssh	10:08:12	0
31230	2	118	0,2	chrt	31232	-21	aten2.4-expect	08:05:24	0
29034	2	117	0,3	chrt	29035	-21	runrttasks	09:42:11	0
690	2	116	0,3	chrt	689	-21	/usr/sbin/munin	11:25:51	0
17348	2	115	0,2	sleep0	17347	-21	seq	10:13:16	0
15513	2	115	0,2	chrt	15512	-21	seq	12:36:30	0
12706	2	114	0,2	sleep0	12709	-21	mailstats	12:32:15	0
17665	2	110	0,2	chrt	17666	-21	chrt	08:35:03	0
30346	2	109	0,2	chrt	30342	-21	aten2.4_rfpower	12:10:35	0
5487	2	108	0,2	chrt	5488	-21	runrttasks	10:44:25	0
29510	2	108	0,2	chrt	29511	-21	aten2.4_rfpower	11:20:34	0
17731	2	106	0,2	chrt	17732	-21	sleep	07:43:31	0
10817	2	106	0,2	chrt	10818	-21	sleep	10:03:38	0
7183	2	105	0,2	chrt	7184	-21	sleep	07:26:02	0
5073	2	105	0,2	sleep0	5074	-21	cat	09:06:34	0
8037	2	103	0,2	sleep0	8039	-21	chrt	08:20:01	0
26203	2	103	0,3	chrt	26204	-21	sleep	12:04:12	0
9773	2	101	0,2	chrt	9774	-21	sh	07:30:42	0
5934	2	99	0,1	sleep0	5936	-21	irqrtprio	09:56:12	0
32258	2	99	0,2	sleep0	32260	-21	grep	10:35:51	0
14969	2	97	0,2	sleep0	14970	-21	collect2	11:46:48	0
18422	2	96	0,2	sleep0	18423	-21	chrt	11:03:37	0
27211	2	92	0,2	sleep0	27215	-21	aten2.4_rfpower	08:50:25	0
12263	2	89	0,1	sleep0	12264	-21	seq	11:42:35	0
9453	2	86	0,2	sleep0	9455	-21	switchtime	12:27:19	0
27126	2	82	0,3	chrt	27111	-21	ntpq	07:05:50	0
17956	2	82	0,1	sleep0	17957	-21	grep	09:25:58	0
14982	2	81	0,2	chrt	14630	-21	apt-get	08:31:12	0
20610	2	80	0,2	sleep0	20611	-21	chrt	11:06:40	0
22287	2	79	0,1	sleep0	22286	-21	seq	09:32:05	0
1925	2	71	0,2	sleep0	1926	-21	seq	07:17:49	0
13438	2	71	0,2	sleep0	13441	-21	cut	10:56:06	0
1849	2	70	0,2	sleep0	1852	-21	sed	12:16:05	0
8354	2	67	0,2	sleep0	8355	-21	seq	11:36:53	0
19377	2	67	0,1	sleep0	19378	-21	seq	11:53:47	0
21635	2	63	0,3	sleep0	21636	-21	cat	10:20:09	0
10629	2	58	3,9	sleep0	10624	-21	ntpq	10:51:38	0
21752	2	57	0,3	sleep0	21753	-21	sleep	10:20:15	0
6798	2	56	0,2	sleep0	6799	-21	chrt	12:23:39	0
28637	2	54	0,2	sleep0	28638	-21	switchtime	12:07:21	0
26483	2	53	2,6	sleep0	26487	-21	ssh	09:38:32	0
25577	2	53	4,9	sleep0	25581	-21	users	08:46:30	0
8945	2	52	4,39	sleep0	9081	-21	runrttasks	08:20:46	0
29237	2	48	0,2	chrt	29235	-21	/usr/sbin/munin	07:10:24	0
29018	90	48	17,23	cyclictest	0	-21	swapper	11:33:38	0
29018	90	48	17,23	cyclictest	0	-21	swapper	11:17:59	0
29018	90	47	19,20	cyclictest	0	-21	swapper	10:34:48	0
29018	90	47	17,22	cyclictest	0	-21	swapper	10:48:52	0
29018	90	45	5,12	cyclictest	21724	-21	irqstats	08:40:46	0
29018	90	43	6,18	cyclictest	3740	-21	/usr/sbin/munin	09:05:05	0
29018	90	43	20,16	cyclictest	0	-21	swapper	08:10:33	0
2189	2	43	0,3	sleep0	2190	-21	sleep	09:50:55	0
29018	90	42	5,10	cyclictest	4135	-21	ntpq	07:21:07	0
29018	90	41	6,26	cyclictest	18693	-21	apt-get	07:45:39	0
29018	90	41	5,9	cyclictest	22133	-21	diskstats	07:50:32	0
29018	90	41	5,17	cyclictest	31768	-21	ssh	09:46:13	0
29018	90	41	4,19	cyclictest	31357	-21	ntpq	08:56:09	0
14962	2	41	0,2	chrt	14963	-21	seq	07:39:33	0
29018	90	40	5,28	cyclictest	29031	-21	ntpq	08:00:54	0
29018	90	40	4,18	cyclictest	26021	-21	ntpq	07:56:03	0
29018	90	40	14,9	cyclictest	12189	-21	ssh	09:16:59	0
29018	90	38	4,26	cyclictest	11783	-21	perl	08:25:37	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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