OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, 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.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rack7slot4s.osadl.org (updated Wed Nov 19, 2025 00:45:07)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
8986	99	60	3,43	cyclictest	30684	-21	ssh	21:50:15	0
8986	99	59	18,29	cyclictest	12	-21	ksoftirqd/0	00:05:14	0
9011	99	56	33,14	cyclictest	295	66	irq/58-eth0	22:30:16	3
9003	99	55	3,34	cyclictest	8192	-21	ssh	22:15:15	2
9003	99	52	2,27	cyclictest	22530	-21	ssh	00:00:14	2
8986	99	50	1,4	cyclictest	13	1	rcu_preempt	19:45:16	0
8986	99	50	1,4	cyclictest	13	1	rcu_preempt	19:45:16	0
8993	99	49	1,43	cyclictest	18081	-21	ssh	22:40:16	1
8993	99	44	3,32	cyclictest	13108	-21	ssh	23:35:16	1
8986	99	44	2,7	cyclictest	13	1	rcu_preempt	22:50:14	0
8986	99	44	1,38	cyclictest	12293	-21	ssh	21:20:14	0
8986	99	44	0,10	cyclictest	13	1	rcu_preempt	19:15:15	0
8993	99	43	2,32	cyclictest	5202	-21	ssh	21:35:15	1
8993	99	43	1,32	cyclictest	27432	-21	ssh	23:05:15	1
8986	99	43	2,34	cyclictest	20679	-21	ssh	21:25:16	0
8993	99	42	6,4	cyclictest	0	-21	swapper/1	21:40:15	1
8993	99	42	5,29	cyclictest	16683	-21	ssh	22:20:15	1
9011	99	41	3,23	cyclictest	295	66	irq/58-eth0	23:50:13	3
9003	99	41	1,21	cyclictest	11861	-21	ssh	23:15:17	2
8986	99	41	3,30	cyclictest	16674	-21	ssh	22:20:14	0
8986	99	40	10,21	cyclictest	12	-21	ksoftirqd/0	20:20:14	0
8986	99	39	2,28	cyclictest	21520	-21	ssh	23:40:16	0
8986	99	39	19,13	cyclictest	12	-21	ksoftirqd/0	21:10:12	0
8993	99	38	9,12	cyclictest	21	-21	ksoftirqd/1	22:15:15	1
8993	99	38	1,27	cyclictest	26582	-21	ssh	22:45:18	1
9011	99	37	6,15	cyclictest	295	66	irq/58-eth0	23:25:15	3
9011	99	37	5,24	cyclictest	295	66	irq/58-eth0	23:55:17	3
9003	99	37	2,25	cyclictest	29170	-21	ssh	21:30:16	2
9003	99	37	2,18	cyclictest	18682	-21	ssh	23:36:36	2
8986	99	35	23,5	cyclictest	12	-21	ksoftirqd/0	23:00:15	0
8993	99	34	2,24	cyclictest	22520	-21	ssh	00:20:15	1
8986	99	34	15,15	cyclictest	12	-21	ksoftirqd/0	21:05:16	0
9011	99	33	2,15	cyclictest	295	66	irq/58-eth0	00:10:14	3
9003	99	33	2,28	cyclictest	3380	-21	ssh	00:05:36	2
9003	99	33	2,18	cyclictest	30754	-21	ssh	22:08:36	2
9003	99	33	11,18	cyclictest	27	-21	ksoftirqd/2	00:35:15	2
8986	99	33	1,23	cyclictest	11841	-21	ssh	23:15:15	0
9011	99	32	2,21	cyclictest	295	66	irq/58-eth0	00:20:13	3
9003	99	32	2,26	cyclictest	13137	-21	rm	21:57:35	2
8993	99	32	22,5	cyclictest	0	-21	swapper/1	21:20:13	1
8993	99	32	2,23	cyclictest	3439	-21	ssh	22:10:29	1
8986	99	32	6,11	cyclictest	26566	-21	ssh	22:45:17	0
9003	99	31	3,22	cyclictest	0	-21	swapper/2	23:43:36	2
9003	99	31	3,18	cyclictest	263	46	irq/40-dwc2_hso	22:10:14	2
9003	99	31	2,7	cyclictest	0	-21	swapper/2	00:22:45	2
8993	99	31	3,21	cyclictest	3487	-21	ssh	23:10:22	1
8993	99	31	2,25	cyclictest	5361	-21	ssh	00:30:14	1
8993	99	31	2,22	cyclictest	20089	-21	ssh	00:16:36	1
8993	99	31	1,27	cyclictest	14150	-21	ssh	23:55:17	1
8993	99	31	0,3	cyclictest	13	1	rcu_preempt	23:15:17	1
8986	99	31	4,17	cyclictest	28250	-21	kworker/0:1	19:30:17	0
8986	99	31	2,22	cyclictest	27427	-21	ssh	00:00:36	0
9011	99	30	3,10	cyclictest	0	-21	swapper/3	22:08:36	3
9003	99	30	12,12	cyclictest	26	1	rcuc/2	22:30:14	2
8993	99	30	20,4	cyclictest	0	-21	swapper/1	00:10:16	1
8986	99	30	2,22	cyclictest	11224	-21	ssh	21:37:11	0
8986	99	30	14,8	cyclictest	8976	-21	cyclictest	22:05:15	0
9011	99	29	17,8	cyclictest	295	66	irq/58-eth0	22:50:15	3
9011	99	29	16,10	cyclictest	295	66	irq/58-eth0	22:00:18	3
9011	99	29	16,10	cyclictest	295	66	irq/58-eth0	22:00:17	3
9003	99	29	6,14	cyclictest	27	-21	ksoftirqd/2	20:00:17	2
9003	99	29	3,21	cyclictest	26	1	rcuc/2	21:10:14	2
9003	99	29	3,21	cyclictest	0	-21	swapper/2	23:48:36	2
9003	99	29	2,18	cyclictest	263	46	irq/40-dwc2_hso	19:30:18	2
8993	99	29	18,6	cyclictest	20	1	rcuc/1	22:30:15	1
8986	99	29	4,19	cyclictest	20272	-21	sh	23:20:16	0
8986	99	29	4,19	cyclictest	20272	-21	sh	23:20:15	0
8986	99	29	2,18	cyclictest	30061	-21	ssh	00:25:16	0
9003	99	28	4,15	cyclictest	263	46	irq/40-dwc2_hso	00:15:15	2
9003	99	28	3,20	cyclictest	0	-21	swapper/2	21:38:36	2
9003	99	28	3,18	cyclictest	263	46	irq/40-dwc2_hso	19:15:15	2
9003	99	28	2,10	cyclictest	11653	-21	ssh	00:10:37	2
9003	99	28	1,18	cyclictest	0	-21	swapper/2	22:25:14	2
9003	99	28	1,15	cyclictest	10730	-21	ssh	22:55:15	2
9003	99	28	1,11	cyclictest	24525	66	ssh	21:45:24	2
8993	99	28	2,21	cyclictest	30248	-21	ssh	00:04:36	1
8993	99	28	2,20	cyclictest	15300	-21	ssh	22:00:18	1
8993	99	28	2,20	cyclictest	15300	-21	ssh	22:00:18	1
8993	99	28	2,16	cyclictest	21	-21	ksoftirqd/1	21:30:16	1
8993	99	28	12,11	cyclictest	28718	-21	ssh	23:25:15	1
8986	99	28	4,18	cyclictest	12049	-21	sh	23:52:39	0
8986	99	28	2,21	cyclictest	25110	-21	ssh	22:25:15	0
8986	99	28	2,20	cyclictest	0	-21	swapper/0	00:17:36	0
8986	99	28	2,19	cyclictest	3846	-21	ssh	21:15:15	0
9011	99	27	3,16	cyclictest	0	-21	swapper/3	21:52:14	3
9011	99	27	3,16	cyclictest	0	-21	swapper/3	00:05:36	3
9003	99	27	2,18	cyclictest	263	46	irq/40-dwc2_hso	20:05:14	2
9003	99	27	2,16	cyclictest	19114	-21	ssh	23:00:15	2
8993	99	27	2,19	cyclictest	13136	-21	sh	21:57:36	1
8986	99	27	3,18	cyclictest	13150	-21	ssh	00:35:17	0
8986	99	27	2,19	cyclictest	28532	-21	ssh	00:22:44	0
8986	99	27	2,19	cyclictest	2754	-21	ssh	21:32:09	0
8986	99	27	2,19	cyclictest	20795	-21	ssh	23:39:36	0
9011	99	26	9,11	cyclictest	295	66	irq/58-eth0	23:15:17	3
9011	99	26	3,16	cyclictest	0	-21	swapper/3	21:57:36	3
9011	99	26	3,15	cyclictest	0	-21	swapper/3	21:37:11	3
9011	99	26	3,15	cyclictest	0	-21	swapper/3	21:30:16	3
9003	99	26	5,15	cyclictest	263	46	irq/40-dwc2_hso	20:35:15	2
9003	99	26	3,17	cyclictest	0	-21	swapper/2	21:22:09	2
9003	99	26	3,16	cyclictest	263	46	irq/40-dwc2_hso	23:25:15	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2019-05-28 - 00:17