OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #8, slot #6

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 rack8slot6s.osadl.org (updated Sat Aug 15, 2026 00:43:41)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
31743	99	1055	1051,2	cyclictest	11379	-21	kworker/1:0+events	22:27:42	1
31750	99	1052	1050,2	cyclictest	29289	-21	kworker/3:1+events	19:29:08	3
31750	99	1052	1049,3	cyclictest	28174	-21	kworker/3:0+events	21:46:50	3
31743	99	1052	1050,2	cyclictest	11379	-21	kworker/1:0+events	22:45:22	1
31750	99	1051	1049,2	cyclictest	8738	-21	kworker/3:2+events	21:44:10	3
31750	99	1051	1049,2	cyclictest	5458	-21	kworker/3:2+events	00:16:26	3
31750	99	1051	1049,2	cyclictest	5458	-21	kworker/3:2+events	00:14:51	3
31750	99	1051	1049,2	cyclictest	31411	-21	kworker/3:1+events	23:00:44	3
31750	99	1051	1049,2	cyclictest	15725	-21	kworker/3:1+events	21:13:00	3
31743	99	1051	1050,1	cyclictest	11379	-21	kworker/1:0+events	22:18:04	1
31743	99	1051	1049,2	cyclictest	7135	-21	kworker/1:0+events	20:48:03	1
31743	99	1051	1049,2	cyclictest	5643	-21	kworker/1:1+events	20:55:53	1
31743	99	1051	1049,2	cyclictest	5643	-21	kworker/1:1+events	20:54:22	1
31743	99	1051	1049,2	cyclictest	24375	-21	kworker/1:2+events	22:58:15	1
31743	99	1051	1049,2	cyclictest	11379	-21	kworker/1:0+events	22:37:20	1
31743	99	1051	1049,2	cyclictest	11379	-21	kworker/1:0+events	22:20:21	1
31750	99	1050	1048,2	cyclictest	8738	-21	kworker/3:2+events	21:37:50	3
31750	99	1050	1048,2	cyclictest	5086	-21	kworker/3:2+events	19:23:19	3
31750	99	1050	1048,2	cyclictest	31567	-21	kworker/3:2+events	19:13:38	3
31750	99	1050	1048,2	cyclictest	28174	-21	kworker/3:0+events	21:21:48	3
31743	99	1050	1048,2	cyclictest	29195	-21	kworker/1:1+events	22:32:09	1
31743	99	1049	1047,2	cyclictest	24375	-21	kworker/1:2+events	22:54:55	1
31750	99	1046	1045,1	cyclictest	15725	-21	kworker/3:1+events	21:19:52	3
31750	99	1046	1044,2	cyclictest	3042	-21	kworker/3:0+events	19:18:14	3
31747	99	1045	1042,3	cyclictest	9689	-21	turbostat	20:59:55	2
31750	99	1031	1028,3	cyclictest	27941	-21	turbostat	20:24:55	3
31750	99	1030	1028,2	cyclictest	6546	-21	turbostat	23:44:56	3
31738	99	1027	1023,4	cyclictest	31612	-21	turbostat	19:14:54	0
31738	99	1023	1021,2	cyclictest	17575	-21	kworker/0:2+events	20:06:52	0
31750	99	1009	1007,2	cyclictest	21896	-21	turbostat	20:09:55	3
31750	99	1007	1005,2	cyclictest	11699	-21	turbostat	21:04:55	3
31747	99	1002	1000,2	cyclictest	24819	-21	kworker/2:1+events	21:54:11	2
31750	99	1001	999,2	cyclictest	12121	-21	turbostat	22:14:54	3
31738	99	1001	998,3	cyclictest	25858	-21	turbostat	22:59:56	0
31747	99	992	991,1	cyclictest	29610	-21	kworker/2:2+events	23:35:22	2
31747	99	991	990,1	cyclictest	26180	-21	kworker/2:0+events	20:23:47	2
31747	99	989	987,2	cyclictest	26180	-21	kworker/2:0+events	20:37:59	2
31738	99	985	984,1	cyclictest	11949	-21	kworker/0:1+events	23:50:45	0
31747	99	984	983,1	cyclictest	31302	-21	kworker/2:0+events	21:56:04	2
31738	99	983	983,0	cyclictest	11949	-21	kworker/0:1+events	23:47:00	0
31738	99	982	981,1	cyclictest	2281	-21	kworker/0:0+events	00:28:57	0
31738	99	981	981,0	cyclictest	4711	-21	kworker/0:0+events	23:12:36	0
31738	99	981	980,1	cyclictest	4711	-21	kworker/0:0+events	22:11:05	0
31738	99	979	977,1	cyclictest	17575	-21	kworker/0:2+events	19:55:22	0
31747	99	978	977,1	cyclictest	24819	-21	kworker/2:1+events	23:26:07	2
31738	99	977	976,1	cyclictest	377	-21	kworker/0:1+events	20:00:22	0
31738	99	976	975,1	cyclictest	4711	-21	kworker/0:0+events	23:24:12	0
31738	99	976	975,1	cyclictest	11949	-21	kworker/0:1+events	00:05:22	0
31738	99	973	972,1	cyclictest	377	-21	kworker/0:1+events	19:46:27	0
31738	99	973	972,1	cyclictest	13427	-21	kworker/0:3+events	00:04:05	0
31738	99	971	970,1	cyclictest	7325	-21	kworker/0:2+events	19:31:16	0
31738	99	971	970,1	cyclictest	377	-21	kworker/0:1+events	19:44:23	0
31738	99	971	970,1	cyclictest	27642	-21	kworker/0:1+events	00:31:48	0
31738	99	970	969,1	cyclictest	4711	-21	kworker/0:0+events	23:15:46	0
31738	99	969	968,1	cyclictest	15775	-21	kworker/0:2+events	00:21:31	0
31738	99	968	968,0	cyclictest	2281	-21	kworker/0:0+events	00:39:45	0
31750	99	964	962,2	cyclictest	29971	-21	turbostat	20:29:55	3
31738	99	962	961,1	cyclictest	10226	-21	kworker/0:0+events	19:38:40	0
31750	99	961	959,2	cyclictest	28853	-21	turbostat	23:34:56	3
31747	99	961	960,1	cyclictest	27391	-21	kworker/2:1+events	20:13:54	2
31738	99	961	960,1	cyclictest	13427	-21	kworker/0:3+events	23:55:44	0
31747	99	960	959,1	cyclictest	26180	-21	kworker/2:0+events	20:30:22	2
31747	99	960	959,1	cyclictest	24819	-21	kworker/2:1+events	22:09:13	2
31738	99	960	958,2	cyclictest	10226	-21	kworker/0:0+events	19:50:42	0
31738	99	959	958,1	cyclictest	4711	-21	kworker/0:0+events	21:31:27	0
31738	99	959	957,2	cyclictest	377	-21	kworker/0:1+events	20:25:54	0
31738	99	959	957,2	cyclictest	17575	-21	kworker/0:2+events	21:01:06	0
31750	99	954	952,2	cyclictest	16564	-21	turbostat	23:54:55	3
31747	99	952	951,1	cyclictest	31970	-21	kworker/2:1+events	21:08:52	2
31747	99	952	949,3	cyclictest	31540	-21	turbostat	00:09:56	2
31747	99	951	950,1	cyclictest	3505	-21	kworker/2:0+events	23:43:50	2
31747	99	949	948,1	cyclictest	31302	-21	kworker/2:0+events	22:04:23	2
31747	99	945	943,2	cyclictest	24819	-21	kworker/2:1+events	23:30:23	2
31750	99	939	937,2	cyclictest	20090	-21	turbostat	00:29:55	3
31747	99	939	939,0	cyclictest	31970	-21	kworker/2:1+events	20:42:13	2
31747	99	939	938,1	cyclictest	26180	-21	kworker/2:0+events	20:15:32	2
31743	99	924	921,3	cyclictest	13746	-21	turbostat	21:09:54	1
31743	99	915	914,1	cyclictest	11379	-21	kworker/1:0+events	22:42:13	1
31750	99	914	911,3	cyclictest	3632	-21	turbostat	20:44:55	3
31750	99	902	901,1	cyclictest	28174	-21	kworker/3:0+events	21:27:59	3
31750	99	897	896,1	cyclictest	28174	-21	kworker/3:0+events	23:05:21	3
31750	99	895	894,1	cyclictest	19862	-21	turbostat	20:04:55	3
31750	99	871	869,2	cyclictest	4837	-21	turbostat	22:39:56	3
31750	99	855	852,3	cyclictest	7034	-21	turbostat	22:09:55	3
31743	99	854	852,2	cyclictest	3858	-21	turbostat	21:34:55	1
31747	99	692	689,3	cyclictest	18738	-21	turbostat	23:24:55	2
31738	99	688	685,3	cyclictest	31176	-21	turbostat	21:29:54	0
31738	99	687	684,3	cyclictest	7034	-21	turbostat	22:09:55	0
31738	99	687	684,3	cyclictest	3509	-21	turbostat	23:09:55	0
31750	99	676	675,1	cyclictest	25858	-21	turbostat	22:59:56	3
31750	99	674	673,1	cyclictest	13746	-21	turbostat	21:09:54	3
31743	99	669	668,1	cyclictest	3632	-21	turbostat	20:44:55	1
31738	99	663	662,1	cyclictest	10052	-21	turbostat	00:19:55	0
31738	99	663	660,3	cyclictest	6546	-21	turbostat	23:44:55	0
31738	99	663	660,3	cyclictest	27941	-21	turbostat	20:24:55	0
31750	99	640	639,1	cyclictest	31540	-21	turbostat	00:09:56	3
31747	99	629	626,3	cyclictest	21896	-21	turbostat	20:09:55	2
31747	99	624	623,1	cyclictest	11699	-21	turbostat	21:04:55	2
31738	99	611	609,2	cyclictest	9689	-21	turbostat	20:59:55	0
31747	99	588	585,2	cyclictest	18852	-21	turbostat	21:49:55	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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