OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of system in rack #0, slot #2

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 rack0slot2.osadl.org (updated Tue Aug 18, 2026 00:43:33)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1280247	2	101	0,1	sleep7	1280248	-21	sh	00:32:38	7
553190	2	51	16,30	sleep7	0	-21	swapper/7	19:06:32	7
553005	2	51	41,7	sleep4	0	-21	swapper/4	19:03:56	4
552979	2	47	36,8	sleep5	0	-21	swapper/5	19:03:33	5
553555	99	46	40,5	cyclictest	1172497	-21	latency_hist	23:47:43	7
553115	2	37	27,7	sleep6	0	-21	swapper/6	19:05:26	6
553547	99	36	33,2	cyclictest	920630	-21	kworker/u16:1+flush-8:0	22:12:44	6
553555	99	35	31,3	cyclictest	980763	-21	latency_hist	22:27:44	7
553547	99	29	26,2	cyclictest	861294	-21	kworker/u16:4+flush-8:0	22:53:10	6
553547	99	28	26,2	cyclictest	861294	-21	kworker/u16:4+flush-8:0	22:32:39	6
553542	99	28	26,2	cyclictest	1076722	-21	kworker/u16:4+events_unbound	23:23:00	4
553542	99	28	24,3	cyclictest	861294	-21	kworker/u16:4+events_unbound	22:23:08	4
553542	99	27	25,2	cyclictest	1195928	-21	kworker/u16:2+flush-8:0	00:27:58	4
553555	99	26	25,0	cyclictest	0	-21	swapper/7	22:38:02	7
553547	99	26	24,2	cyclictest	542557	-21	kworker/u16:4+events_unbound	19:33:32	6
553546	99	26	24,2	cyclictest	644407	-21	kworker/u16:4+events_unbound	20:16:03	5
553542	99	26	24,2	cyclictest	991717	-21	kworker/u16:1+flush-8:0	22:33:07	4
553542	99	26	24,2	cyclictest	861294	-21	kworker/u16:4+events_unbound	21:58:00	4
553542	99	26	23,2	cyclictest	1004651	-21	kworker/u16:2+flush-8:0	23:02:59	4
553547	99	25	23,2	cyclictest	1004811	-21	kworker/u16:3+events_unbound	23:02:58	6
553546	99	25	23,2	cyclictest	624931	-21	kworker/u16:2+events_unbound	20:41:27	5
553546	99	25	23,2	cyclictest	624931	-21	kworker/u16:2+events_unbound	19:56:56	5
553546	99	25	23,2	cyclictest	1148251	-21	kworker/u16:2+events_unbound	23:37:26	5
553542	99	25	23,2	cyclictest	1004811	-21	kworker/u16:3+flush-8:0	23:47:58	4
553542	99	25	23,2	cyclictest	1004811	-21	kworker/u16:3+flush-8:0	23:47:58	4
553542	99	25	23,2	cyclictest	1004811	-21	kworker/u16:3+flush-8:0	00:08:22	4
553547	99	24	22,2	cyclictest	779481	-21	kworker/u16:1+flush-8:0	21:35:21	6
553547	99	24	22,2	cyclictest	750785	-21	kworker/u16:3+flush-8:0	21:07:44	6
553547	99	24	22,2	cyclictest	750785	-21	kworker/u16:3+flush-8:0	21:07:44	6
553547	99	24	22,2	cyclictest	615072	-21	kworker/u16:1+flush-8:0	19:48:11	6
553547	99	24	22,2	cyclictest	1122497	-21	kworker/u16:0+flush-8:0	23:45:13	6
553547	99	24	21,2	cyclictest	1004811	-21	kworker/u16:3+flush-8:0	00:17:49	6
553546	99	24	22,2	cyclictest	907171	-21	kworker/u16:0+events_unbound	21:55:14	5
553546	99	24	22,2	cyclictest	813291	-21	kworker/u16:3+events_unbound	21:52:39	5
553546	99	24	22,2	cyclictest	813291	-21	kworker/u16:3+events_unbound	21:52:39	5
553546	99	24	22,2	cyclictest	693057	-21	kworker/u16:1+events_unbound	20:29:08	5
553546	99	24	22,2	cyclictest	644407	-21	kworker/u16:4+events_unbound	20:54:48	5
553546	99	24	22,2	cyclictest	634805	-21	kworker/u16:0+flush-8:0	20:18:03	5
553546	99	24	22,2	cyclictest	553776	-21	kworker/u16:0+events_unbound	19:20:44	5
553546	99	24	22,2	cyclictest	1195928	-21	kworker/u16:2+events_unbound	23:59:04	5
553546	99	24	22,2	cyclictest	1004811	-21	kworker/u16:3+events_unbound	23:27:34	5
553546	99	24	20,3	cyclictest	1075265	-21	kworker/u16:1+flush-8:0	23:07:43	5
553555	99	23	0,21	cyclictest	586279	-21	latency_hist	19:22:45	7
553547	99	23	21,2	cyclictest	861294	-21	kworker/u16:4+events_unbound	22:43:04	6
553547	99	23	21,2	cyclictest	644407	-21	kworker/u16:4+flush-8:0	20:57:59	6
553547	99	23	21,2	cyclictest	644407	-21	kworker/u16:4+events_unbound	20:44:07	6
553547	99	23	21,2	cyclictest	634805	-21	kworker/u16:0+events_unbound	20:18:00	6
553547	99	23	21,2	cyclictest	499165	-21	kworker/u16:3+events_unbound	19:41:31	6
553546	99	23	21,2	cyclictest	991717	-21	kworker/u16:1+events_unbound	22:31:21	5
553546	99	23	21,2	cyclictest	920630	-21	kworker/u16:1+events_unbound	22:13:30	5
553546	99	23	21,2	cyclictest	813291	-21	kworker/u16:3+events_unbound	21:21:07	5
553546	99	23	21,2	cyclictest	644407	-21	kworker/u16:4+events_unbound	20:59:51	5
553546	99	23	21,2	cyclictest	644407	-21	kworker/u16:4+events_unbound	20:51:23	5
553555	99	22	0,20	cyclictest	1064630	-21	latency_hist	23:02:43	7
553547	99	22	20,2	cyclictest	634805	-21	kworker/u16:0+events_unbound	20:14:19	6
553547	99	22	20,2	cyclictest	1004811	-21	kworker/u16:3+flush-8:0	23:48:02	6
553547	99	22	20,2	cyclictest	1004811	-21	kworker/u16:3+flush-8:0	23:48:02	6
553547	99	22	20,2	cyclictest	1004811	-21	kworker/u16:3+events_unbound	23:08:01	6
553547	99	22	20,2	cyclictest	1004811	-21	kworker/u16:3+events_unbound	23:08:01	6
553546	99	22	20,2	cyclictest	624931	-21	kworker/u16:2+events_unbound	20:43:11	5
553546	99	22	20,2	cyclictest	624931	-21	kworker/u16:2+events_unbound	19:51:47	5
553546	99	22	20,2	cyclictest	499165	-21	kworker/u16:3+flush-8:0	19:14:03	5
553546	99	22	20,2	cyclictest	1182823	-21	kworker/u16:1+events_unbound	23:53:28	5
553546	99	22	20,2	cyclictest	1182823	-21	kworker/u16:1+events_unbound	23:53:28	5
553546	99	22	20,2	cyclictest	1076722	-21	kworker/u16:4+flush-8:0	23:12:17	5
553546	99	22	20,2	cyclictest	1076722	-21	kworker/u16:4+flush-8:0	23:12:17	5
553546	99	22	19,2	cyclictest	553776	-21	kworker/u16:0+events_unbound	19:32:44	5
1218395	2	22	19,2	sleep4	1004811	-21	kworker/u16:3+events_unbound	00:03:43	4
553555	99	21	19,1	cyclictest	0	-21	swapper/7	19:43:00	7
553547	99	21	19,2	cyclictest	991717	-21	kworker/u16:1+events_unbound	22:37:58	6
553547	99	21	19,2	cyclictest	644407	-21	kworker/u16:4+events_unbound	20:25:31	6
553547	99	21	19,2	cyclictest	624931	-21	kworker/u16:2+events_unbound	20:28:31	6
553547	99	21	19,2	cyclictest	1196605	-21	kworker/u16:4+flush-8:0	00:04:41	6
553547	99	21	0,21	cyclictest	0	-21	swapper/6	21:19:55	6
553546	99	21	19,2	cyclictest	750580	-21	kworker/u16:0+events_unbound	21:08:25	5
553546	99	21	19,2	cyclictest	750580	-21	kworker/u16:0+events_unbound	21:08:25	5
553546	99	21	19,2	cyclictest	644407	-21	kworker/u16:4+events_unbound	20:27:07	5
553546	99	21	19,2	cyclictest	624931	-21	kworker/u16:2+flush-8:0	19:42:58	5
553546	99	21	19,2	cyclictest	624931	-21	kworker/u16:2+events_unbound	20:01:31	5
553546	99	21	19,2	cyclictest	1122497	-21	kworker/u16:0+events_unbound	23:46:10	5
553542	99	21	19,2	cyclictest	750580	-21	kworker/u16:0+flush-8:0	21:33:15	4
553542	99	21	18,2	cyclictest	800831	-21	kworker/u16:2+flush-8:0	21:18:02	4
553547	99	20	18,2	cyclictest	861294	-21	kworker/u16:4+events_unbound	22:52:04	6
553547	99	20	18,2	cyclictest	624931	-21	kworker/u16:2+flush-8:0	19:59:27	6
553546	99	20	18,2	cyclictest	932821	-21	kworker/u16:2+events_unbound	22:22:43	5
553546	99	20	18,2	cyclictest	750580	-21	kworker/u16:0+flush-8:0	21:23:55	5
553546	99	20	18,2	cyclictest	731180	-21	kworker/u16:1+events_unbound	20:37:31	5
553546	99	20	18,2	cyclictest	542557	-21	kworker/u16:4+events_unbound	19:26:11	5
553546	99	20	18,2	cyclictest	499165	-21	kworker/u16:3+flush-8:0	19:28:08	5
553546	99	20	18,2	cyclictest	3293358	-21	kworker/u16:2+flush-8:0	19:09:52	5
553546	99	20	18,2	cyclictest	1076722	-21	kworker/u16:4+events_unbound	23:28:27	5
553546	99	20	18,2	cyclictest	1004811	-21	kworker/u16:3+flush-8:0	22:48:24	5
553546	99	20	18,2	cyclictest	1004811	-21	kworker/u16:3+events_unbound	23:18:46	5
553542	99	20	18,2	cyclictest	1039034	-21	kworker/u16:0+events_unbound	22:58:11	4
553555	99	19	14,4	cyclictest	1302	-21	snmpd	22:48:03	7
553547	99	19	17,2	cyclictest	861294	-21	kworker/u16:4+events_unbound	21:53:28	6
553547	99	19	17,2	cyclictest	499165	-21	kworker/u16:3+flush-8:0	19:27:06	6
553547	99	19	17,2	cyclictest	1075265	-21	kworker/u16:1+events_unbound	23:13:16	6
553547	99	19	16,2	cyclictest	1076722	-21	kworker/u16:4+events_unbound	23:18:03	6
553546	99	19	17,2	cyclictest	499165	-21	kworker/u16:3+events_unbound	19:40:29	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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