OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of system in rack #0, slot #5

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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 rack0slot5.osadl.org (updated Sun Sep 20, 2026 00:43:48)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
4143818	99	546	545,1	cyclictest	43184	-21	kworker/11:1+i915-unordered	21:28:12	3
4143818	99	542	540,2	cyclictest	123638	-21	kworker/11:0+i915-unordered	22:45:12	3
4143810	99	536	535,1	cyclictest	55147	-21	kworker/9:1+i915-unordered	21:18:12	15
4143828	99	529	4,44	cyclictest	0	-21	swapper/13	22:42:12	5
4143791	99	516	16,455	cyclictest	61	-21	ksoftirqd/4	19:07:12	10
4143808	99	490	0,58	cyclictest	0	-21	swapper/8	22:35:34	14
4143794	99	488	12,59	cyclictest	0	-21	swapper/5	19:46:56	11
4143836	99	481	451,30	cyclictest	0	-21	swapper/15	00:08:12	7
4143810	99	481	0,480	cyclictest	0	-21	swapper/9	00:03:12	15
4143791	99	479	44,434	cyclictest	0	-21	swapper/4	19:17:12	10
4143810	99	475	475,0	cyclictest	43254	-21	kworker/9:0+i915-unordered	21:20:12	15
4143803	99	467	466,1	cyclictest	150417	-21	kworker/7:1+i915-unordered	23:37:12	13
4143803	99	467	465,2	cyclictest	188085	-21	kworker/7:2+i915-unordered	00:08:12	13
4143789	99	467	467,0	cyclictest	4101936	-21	kworker/3:0+i915-unordered	20:18:12	9
4143791	99	465	3,461	cyclictest	0	-21	swapper/4	20:20:12	10
4143784	99	462	14,29	cyclictest	0	-21	swapper/2	21:34:34	8
4143776	99	462	18,29	cyclictest	0	-21	swapper/0	20:45:12	0
4143794	99	459	10,30	cyclictest	0	-21	swapper/5	23:18:33	11
4143794	99	459	10,30	cyclictest	0	-21	swapper/5	22:27:57	11
4143794	99	457	9,30	cyclictest	0	-21	swapper/5	23:52:34	11
4143794	99	457	9,30	cyclictest	0	-21	swapper/5	23:52:34	11
4143784	99	457	12,28	cyclictest	0	-21	swapper/2	20:26:35	8
4143818	99	456	7,28	cyclictest	0	-21	swapper/11	00:26:35	3
4143803	99	456	454,2	cyclictest	171873	-21	kworker/7:2+i915-unordered	23:41:12	13
4143784	99	456	7,446	cyclictest	0	-21	swapper/2	23:11:34	8
4143836	99	455	452,3	cyclictest	0	-21	swapper/15	23:37:12	7
4143836	99	454	449,4	cyclictest	1818	-21	snmpd	23:06:23	7
4143810	99	453	452,1	cyclictest	0	-21	swapper/9	21:01:12	15
4143791	99	453	6,29	cyclictest	0	-21	swapper/4	23:39:34	10
4143828	99	452	8,29	cyclictest	0	-21	swapper/13	23:01:12	5
4143794	99	452	26,30	cyclictest	0	-21	swapper/5	19:50:58	11
4143784	99	451	4,30	cyclictest	0	-21	swapper/2	21:49:35	8
4143784	99	451	4,30	cyclictest	0	-21	swapper/2	21:11:55	8
4143784	99	451	4,30	cyclictest	0	-21	swapper/2	21:11:55	8
4143781	99	451	25,30	cyclictest	0	-21	swapper/1	19:04:55	1
4143781	99	451	24,30	cyclictest	0	-21	swapper/1	00:09:55	1
4143818	99	450	0,30	cyclictest	0	-21	swapper/11	20:15:33	3
4143791	99	450	3,28	cyclictest	0	-21	swapper/4	19:23:56	10
4143784	99	450	2,29	cyclictest	0	-21	swapper/2	22:53:54	8
4143836	99	449	448,1	cyclictest	0	-21	swapper/15	21:18:12	7
4143799	99	449	23,28	cyclictest	0	-21	swapper/6	23:23:32	12
4143781	99	448	22,30	cyclictest	0	-21	swapper/1	21:10:57	1
4143781	99	448	22,30	cyclictest	0	-21	swapper/1	21:10:57	1
4143784	99	447	0,30	cyclictest	0	-21	swapper/2	22:54:56	8
4143799	99	446	22,0	cyclictest	0	-21	swapper/6	20:11:35	12
4143781	99	446	0,29	cyclictest	0	-21	swapper/1	20:58:12	1
4143832	99	445	442,2	cyclictest	87238	-21	kworker/14:1+i915-unordered	21:52:12	6
4143799	99	444	0,26	cyclictest	0	-21	swapper/6	22:02:55	12
4143794	99	444	0,30	cyclictest	0	-21	swapper/5	21:54:07	11
4143784	99	444	441,2	cyclictest	143609	-21	kworker/u64:1+events_unbound	23:23:12	8
4143791	99	443	24,416	cyclictest	0	-21	swapper/4	21:20:55	10
4143818	99	442	21,420	cyclictest	0	-21	swapper/11	20:27:56	3
4143791	99	442	23,417	cyclictest	0	-21	swapper/4	22:12:53	10
4143784	99	442	23,416	cyclictest	0	-21	swapper/2	22:34:35	8
4143836	99	441	440,1	cyclictest	0	-21	swapper/15	23:41:12	7
4143828	99	440	12,28	cyclictest	42123	-21	ntpq	20:54:34	5
4143818	99	440	22,417	cyclictest	0	-21	swapper/11	23:49:33	3
4143818	99	440	22,417	cyclictest	0	-21	swapper/11	23:49:33	3
4143803	99	440	439,1	cyclictest	0	-21	swapper/7	21:38:12	13
4143803	99	440	20,28	cyclictest	0	-21	swapper/7	23:33:12	13
4143803	99	439	20,29	cyclictest	0	-21	swapper/7	21:30:12	13
4143784	99	439	19,419	cyclictest	0	-21	swapper/2	21:59:34	8
4143828	99	438	435,2	cyclictest	4168733	-21	kworker/13:0+i915-unordered	19:34:33	5
4143828	99	438	21,416	cyclictest	0	-21	swapper/13	00:30:11	5
4143794	99	438	15,29	cyclictest	0	-21	swapper/5	00:01:56	11
4143791	99	438	17,420	cyclictest	0	-21	swapper/4	21:42:32	10
4143828	99	437	20,416	cyclictest	0	-21	swapper/13	22:15:12	5
4143813	99	437	22,415	cyclictest	0	-21	swapper/10	20:49:35	2
4143794	99	437	436,1	cyclictest	127485	-21	kworker/5:2+i915-unordered	22:42:12	11
4143794	99	437	15,419	cyclictest	0	-21	swapper/5	23:45:34	11
4143794	99	437	11,30	cyclictest	0	-21	swapper/5	19:11:35	11
4143784	99	437	19,417	cyclictest	0	-21	swapper/2	21:04:35	8
4143784	99	437	19,417	cyclictest	0	-21	swapper/2	21:04:35	8
4143784	99	437	18,418	cyclictest	0	-21	swapper/2	00:29:33	8
4143810	99	436	16,419	cyclictest	0	-21	swapper/9	20:12:57	15
4143803	99	436	433,2	cyclictest	0	-21	swapper/7	23:06:23	13
4143803	99	436	23,412	cyclictest	0	-21	swapper/7	00:17:11	13
4143794	99	436	11,29	cyclictest	0	-21	swapper/5	21:23:35	11
4143784	99	436	18,417	cyclictest	0	-21	swapper/2	21:57:35	8
4143818	99	435	20,414	cyclictest	0	-21	swapper/11	22:59:56	3
4143818	99	435	19,415	cyclictest	0	-21	swapper/11	00:31:33	3
4143818	99	435	18,416	cyclictest	0	-21	swapper/11	22:08:33	3
4143818	99	435	15,419	cyclictest	0	-21	swapper/11	23:16:32	3
4143818	99	435	14,420	cyclictest	0	-21	swapper/11	22:55:32	3
4143813	99	435	20,414	cyclictest	0	-21	swapper/10	19:32:12	2
4143810	99	435	11,423	cyclictest	0	-21	swapper/9	21:40:34	15
4143791	99	435	9,29	cyclictest	0	-21	swapper/4	20:41:35	10
4143784	99	435	16,418	cyclictest	0	-21	swapper/2	22:22:12	8
4143784	99	435	15,419	cyclictest	0	-21	swapper/2	19:42:34	8
4143784	99	435	10,29	cyclictest	0	-21	swapper/2	20:02:34	8
4143781	99	435	19,415	cyclictest	0	-21	swapper/1	21:16:12	1
4143828	99	434	23,410	cyclictest	0	-21	swapper/13	23:09:07	5
4143818	99	434	18,415	cyclictest	0	-21	swapper/11	22:52:33	3
4143818	99	434	17,416	cyclictest	0	-21	swapper/11	20:50:57	3
4143818	99	434	17,416	cyclictest	0	-21	swapper/11	19:36:33	3
4143799	99	434	433,1	cyclictest	697	50	irq/159-i915	21:52:12	12
4143789	99	434	433,0	cyclictest	0	-21	swapper/3	21:48:12	9
4143784	99	434	14,419	cyclictest	0	-21	swapper/2	19:32:56	8
4143832	99	433	430,2	cyclictest	142377	-21	kworker/14:2+i915-unordered	23:06:12	6
4143828	99	433	432,1	cyclictest	143683	-21	kworker/13:1+i915-unordered	23:34:35	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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