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 Mon Aug 31, 2026 12:43:34)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2864479	2	67	56,7	sleep4	0	-21	swapper/4	07:09:18	4
2864441	2	59	49,7	sleep5	0	-21	swapper/5	07:08:47	5
2864322	2	53	19,29	sleep7	0	-21	swapper/7	07:07:04	7
2864816	99	47	43,3	cyclictest	2874032	-21	kworker/u16:2+flush-8:0	08:14:40	6
2864816	99	47	43,3	cyclictest	2874032	-21	kworker/u16:2+flush-8:0	08:14:40	6
2864814	99	44	39,5	cyclictest	3274370	-21	kworker/u16:3+flush-8:0	10:49:41	5
2864809	99	41	39,2	cyclictest	2887918	-21	kworker/u16:3+flush-8:0	07:44:41	4
2864814	99	40	38,2	cyclictest	3078956	-21	kworker/u16:4+flush-8:0	09:54:40	5
2864820	99	38	33,4	cyclictest	3249700	-21	latency_hist	10:09:41	7
2864415	2	38	27,8	sleep6	0	-21	swapper/6	07:08:24	6
2864820	99	37	32,4	cyclictest	3261956	-21	latency_hist	10:14:40	7
2864814	99	36	34,2	cyclictest	3521295	-21	kworker/u16:0+flush-8:0	12:24:35	5
2864814	99	36	34,2	cyclictest	3521295	-21	kworker/u16:0+flush-8:0	12:24:35	5
2864816	99	35	29,6	cyclictest	3225363	-21	kworker/u16:2+flush-8:0	10:19:58	6
2864814	99	34	32,2	cyclictest	3078956	-21	kworker/u16:4+flush-8:0	09:45:31	5
2864820	99	33	4,27	cyclictest	648	-21	systemd-journal	09:49:40	7
2864814	99	33	31,2	cyclictest	3005748	-21	kworker/u16:3+flush-8:0	09:35:10	5
2864814	99	33	31,2	cyclictest	3005748	-21	kworker/u16:3+flush-8:0	09:35:10	5
2864820	99	32	27,4	cyclictest	3237301	-21	latency_hist	10:04:41	7
2864814	99	32	30,2	cyclictest	2994972	-21	kworker/u16:1+flush-8:0	08:29:41	5
2864816	99	31	29,2	cyclictest	3078956	-21	kworker/u16:4+events_unbound	09:50:18	6
2864816	99	31	28,3	cyclictest	3274370	-21	kworker/u16:3+flush-8:0	11:30:06	6
2864816	99	31	28,2	cyclictest	3225363	-21	kworker/u16:2+flush-8:0	11:14:46	6
2864809	99	31	28,2	cyclictest	3361246	-21	kworker/u16:6+flush-8:0	11:04:58	4
2864809	99	31	28,2	cyclictest	3078956	-21	kworker/u16:4+flush-8:0	09:34:40	4
2864814	99	30	28,2	cyclictest	3005748	-21	kworker/u16:3+flush-8:0	09:04:40	5
2864814	99	30	27,2	cyclictest	2887918	-21	kworker/u16:3+events_unbound	07:44:54	5
2864816	99	29	27,2	cyclictest	3225363	-21	kworker/u16:2+flush-8:0	11:10:02	6
2864816	99	29	27,2	cyclictest	3005748	-21	kworker/u16:3+flush-8:0	08:54:40	6
2864809	99	29	27,2	cyclictest	3005748	-21	kworker/u16:3+flush-8:0	09:39:55	4
2864809	99	29	25,3	cyclictest	3225363	-21	kworker/u16:2+flush-8:0	12:09:40	4
2864816	99	28	26,2	cyclictest	3521295	-21	kworker/u16:0+events_unbound	12:05:03	6
2864816	99	28	26,2	cyclictest	3225363	-21	kworker/u16:2+flush-8:0	12:10:06	6
2864816	99	28	26,2	cyclictest	3225363	-21	kworker/u16:2+events_unbound	11:05:03	6
2864816	99	28	26,2	cyclictest	2994972	-21	kworker/u16:1+flush-8:0	08:24:41	6
2864816	99	28	24,3	cyclictest	2874032	-21	kworker/u16:2+flush-8:0	07:45:06	6
2864814	99	28	26,2	cyclictest	3521295	-21	kworker/u16:0+flush-8:0	12:07:00	5
2864814	99	28	26,2	cyclictest	3078956	-21	kworker/u16:4+flush-8:0	10:15:32	5
2864814	99	28	26,2	cyclictest	2887918	-21	kworker/u16:3+flush-8:0	07:24:36	5
2864814	99	28	25,2	cyclictest	3005748	-21	kworker/u16:3+flush-8:0	09:09:40	5
2864809	99	28	26,2	cyclictest	3225363	-21	kworker/u16:2+flush-8:0	11:44:40	4
2864809	99	28	26,2	cyclictest	3225363	-21	kworker/u16:2+flush-8:0	11:44:40	4
2864816	99	26	24,2	cyclictest	3471903	-21	kworker/u16:1+events_unbound	11:39:54	6
2864816	99	26	24,2	cyclictest	3471903	-21	kworker/u16:1+events_unbound	11:39:54	6
2864814	99	26	25,1	cyclictest	2863598	-21	kworker/u16:1+flush-8:0	07:25:02	5
2864814	99	26	25,1	cyclictest	2863598	-21	kworker/u16:1+flush-8:0	07:25:02	5
2864814	99	26	24,2	cyclictest	3222462	-21	kworker/u16:0+events_unbound	10:00:02	5
2864814	99	26	24,2	cyclictest	3005748	-21	kworker/u16:3+events_unbound	09:30:00	5
2864809	99	26	24,2	cyclictest	3078956	-21	kworker/u16:4+events_unbound	09:15:31	4
2864814	99	25	23,2	cyclictest	3335627	-21	kworker/u16:1+flush-8:0	10:49:50	5
2864814	99	25	23,2	cyclictest	3225363	-21	kworker/u16:2+flush-8:0	11:15:10	5
2864809	99	25	23,2	cyclictest	3274370	-21	kworker/u16:3+flush-8:0	11:50:06	4
2864809	99	25	23,2	cyclictest	2887918	-21	kworker/u16:3+flush-8:0	07:55:07	4
2864809	99	25	22,2	cyclictest	3005748	-21	kworker/u16:3+flush-8:0	08:29:58	4
2864814	99	24	22,2	cyclictest	3005748	-21	kworker/u16:3+flush-8:0	08:54:59	5
2864814	99	24	22,2	cyclictest	2994972	-21	kworker/u16:1+flush-8:0	08:35:31	5
2864809	99	24	22,2	cyclictest	3595013	-21	kworker/u16:1+flush-8:0	12:36:50	4
2864809	99	24	22,2	cyclictest	3274370	-21	kworker/u16:3+events_unbound	10:20:06	4
2864809	99	24	21,3	cyclictest	2994973	-21	kworker/u16:4+flush-8:0	08:20:06	4
2864809	99	24	21,2	cyclictest	3222462	-21	kworker/u16:0+flush-8:0	09:59:46	4
2864814	99	23	21,2	cyclictest	2874032	-21	kworker/u16:2+flush-8:0	08:04:55	5
2864814	99	23	20,2	cyclictest	2863598	-21	kworker/u16:1+flush-8:0	07:15:00	5
2864809	99	23	21,2	cyclictest	3521295	-21	kworker/u16:0+flush-8:0	12:25:05	4
2864809	99	23	20,2	cyclictest	3225363	-21	kworker/u16:2+flush-8:0	10:40:01	4
2864820	99	22	17,4	cyclictest	3082341	-21	latency_hist	08:59:40	7
2864814	99	22	20,2	cyclictest	3555755	-21	kworker/u16:3+events_unbound	12:33:50	5
2864814	99	22	20,2	cyclictest	3555755	-21	kworker/u16:3+events_unbound	12:13:50	5
2864814	99	22	20,2	cyclictest	3471903	-21	kworker/u16:1+events_unbound	12:16:50	5
2864814	99	22	20,2	cyclictest	3361246	-21	kworker/u16:6+flush-8:0	10:57:46	5
2864814	99	22	20,2	cyclictest	3005748	-21	kworker/u16:3+flush-8:0	09:40:14	5
2864814	99	22	20,2	cyclictest	2874032	-21	kworker/u16:2+flush-8:0	08:00:03	5
2864814	99	22	16,5	cyclictest	3078956	-21	kworker/u16:4+flush-8:0	09:24:41	5
2864809	99	22	19,2	cyclictest	3078956	-21	kworker/u16:4+flush-8:0	08:55:06	4
2864809	99	22	19,2	cyclictest	3005748	-21	kworker/u16:3+flush-8:0	08:53:03	4
2864809	99	22	17,4	cyclictest	3348934	-21	munin-node	10:49:53	4
2864820	99	21	2,17	cyclictest	648	-21	systemd-journal	08:39:41	7
2864820	99	21	16,4	cyclictest	3311354	-21	latency_hist	10:34:40	7
2864816	99	21	19,2	cyclictest	3063052	-21	kworker/u16:2+flush-8:0	08:59:40	6
2864814	99	21	19,2	cyclictest	3274370	-21	kworker/u16:3+flush-8:0	11:32:50	5
2864814	99	21	19,2	cyclictest	3222462	-21	kworker/u16:0+events_unbound	10:04:53	5
2864814	99	21	18,3	cyclictest	3595013	-21	kworker/u16:1+flush-8:0	12:35:03	5
2864814	99	21	18,2	cyclictest	3222462	-21	kworker/u16:0+events_unbound	10:29:54	5
2864809	99	21	18,3	cyclictest	2994972	-21	kworker/u16:1+flush-8:0	08:44:56	4
2864809	99	21	18,2	cyclictest	3225363	-21	kworker/u16:2+flush-8:0	11:20:04	4
2864816	99	20	18,2	cyclictest	3222462	-21	kworker/u16:0+events_unbound	10:39:54	6
2864816	99	20	18,2	cyclictest	2994972	-21	kworker/u16:1+flush-8:0	08:24:56	6
2864814	99	20	18,2	cyclictest	3225363	-21	kworker/u16:2+events_unbound	11:08:50	5
2864809	99	20	18,2	cyclictest	2887918	-21	kworker/u16:3+flush-8:0	08:05:02	4
2864809	99	20	17,2	cyclictest	3078956	-21	kworker/u16:4+flush-8:0	10:09:51	4
2864816	99	19	17,2	cyclictest	3078956	-21	kworker/u16:4+events_unbound	09:10:04	6
2864814	99	19	17,2	cyclictest	3274370	-21	kworker/u16:3+events_unbound	11:40:04	5
2864814	99	19	17,2	cyclictest	3274370	-21	kworker/u16:3+events_unbound	11:40:04	5
2864814	99	19	17,2	cyclictest	3078956	-21	kworker/u16:4+events_unbound	10:10:02	5
2864814	99	19	17,2	cyclictest	3005748	-21	kworker/u16:3+flush-8:0	09:15:11	5
2864809	99	19	17,2	cyclictest	3078956	-21	kworker/u16:4+flush-8:0	09:25:11	4
2864809	99	19	17,2	cyclictest	3063052	-21	kworker/u16:2+flush-8:0	09:14:36	4
2864809	99	19	17,2	cyclictest	2863598	-21	kworker/u16:1+flush-8:0	07:19:40	4
2864809	99	19	16,2	cyclictest	2887918	-21	kworker/u16:3+flush-8:0	07:49:56	4
2864820	99	18	14,3	cyclictest	1277	-21	snmpd	07:32:02	7
2864814	99	18	16,2	cyclictest	3225363	-21	kworker/u16:2+flush-8:0	12:00:43	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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