OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, 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.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: ondemand
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rack5slot4s.osadl.org (updated Thu Nov 27, 2025 00:44:16)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
699633	2	92	0,5	chrt	0	-21	swapper/3	21:21:19	3
889514	2	60	0,3	sleep0	0	-21	swapper/0	00:36:15	0
573235	99	57	46,8	cyclictest	873144	-21	ntpq	00:16:21	0
573240	99	56	47,6	cyclictest	649580	-21	latency_hist	20:25:01	1
573235	99	53	42,8	cyclictest	838578	-21	ntpq	23:41:19	0
573240	99	51	47,3	cyclictest	563296	-21	kworker/u8:3+flush-8:0	21:31:24	1
797580	2	50	0,2	sleep1	29	1	ktimers/1	23:01:17	1
573240	99	50	46,3	cyclictest	685875	-21	kworker/u8:4+flush-8:0	21:11:26	1
573240	99	50	45,4	cyclictest	720549	-21	kworker/u8:1+flush-8:0	21:51:25	1
573240	99	48	43,4	cyclictest	531737	-21	kworker/u8:2+flush-8:0	19:46:24	1
573240	99	48	41,5	cyclictest	765253	-21	kworker/u8:2+flush-8:0	23:21:20	1
573242	99	47	22,8	cyclictest	735539	-21	cat	22:00:01	2
573240	99	47	43,3	cyclictest	563296	-21	kworker/u8:3+flush-8:0	21:06:13	1
573240	99	47	42,4	cyclictest	661155	-21	kworker/u8:1+flush-8:0	20:51:23	1
573240	99	47	40,5	cyclictest	809758	-21	kworker/u8:0+events_unbound	00:36:24	1
573235	99	47	41,4	cyclictest	563296	-21	kworker/u8:3+flush-8:0	20:51:12	0
573240	99	46	39,5	cyclictest	854510	-21	kworker/u8:1+flush-8:0	00:11:22	1
573240	99	46	38,6	cyclictest	720632	-21	apt-get	21:46:07	1
573240	99	45	40,4	cyclictest	715569	-21	kworker/u8:0+events_unbound	22:01:16	1
573240	99	45	40,4	cyclictest	531737	-21	kworker/u8:2+flush-8:0	19:56:27	1
573240	99	45	39,4	cyclictest	715569	-21	kworker/u8:0+flush-8:0	22:21:21	1
573235	99	45	40,4	cyclictest	720549	-21	kworker/u8:1+flush-8:0	21:56:24	0
573235	99	45	38,5	cyclictest	282	-21	systemd-journal	23:56:15	0
573235	99	45	37,6	cyclictest	573073	-21	kworker/u8:1+flush-8:0	20:11:14	0
573235	99	44	36,6	cyclictest	282	-21	systemd-journal	21:10:00	0
573235	99	44	35,7	cyclictest	705452	-21	latency_hist	21:30:01	0
573235	99	44	35,6	cyclictest	755463	-21	/usr/sbin/munin	22:21:20	0
573240	99	43	38,3	cyclictest	765253	-21	kworker/u8:2+events_unbound	23:46:20	1
573240	99	43	38,3	cyclictest	715569	-21	kworker/u8:0+flush-8:0	22:11:24	1
573240	99	43	37,5	cyclictest	720549	-21	kworker/u8:1+flush-8:0	22:31:27	1
573240	99	43	37,4	cyclictest	765253	-21	kworker/u8:2+events_unbound	23:31:27	1
573240	99	43	37,4	cyclictest	765253	-21	kworker/u8:2+events_unbound	23:31:27	1
573240	99	43	36,5	cyclictest	720549	-21	kworker/u8:1+flush-8:0	22:46:24	1
573235	99	43	32,8	cyclictest	805420	-21	diskstats	23:11:11	0
573240	99	42	37,3	cyclictest	715569	-21	kworker/u8:0+events_unbound	22:06:23	1
573240	99	42	34,3	cyclictest	715569	-21	kworker/u8:0+events_unbound	22:26:15	1
573240	99	42	28,5	cyclictest	809758	-21	kworker/u8:0+events_unbound	23:51:29	1
573235	99	42	33,7	cyclictest	879591	-21	diskstats	00:26:15	0
573242	99	41	27,3	cyclictest	815082	-21	aten2_r5power_c	23:21:09	2
573242	99	41	18,8	cyclictest	609240	-21	ntpq	19:41:21	2
573240	99	41	36,3	cyclictest	790032	-21	kworker/u8:3+flush-8:0	23:11:17	1
573240	99	41	35,4	cyclictest	573073	-21	kworker/u8:1+events_unbound	20:20:00	1
573235	99	41	32,7	cyclictest	690956	-21	/usr/sbin/munin	21:16:18	0
573235	99	41	30,8	cyclictest	584178	-21	ntpq	19:16:21	0
573242	99	40	31,7	cyclictest	282	-21	systemd-journal	21:30:01	2
573240	99	40	35,3	cyclictest	720549	-21	kworker/u8:1+events_unbound	21:56:27	1
573235	99	40	36,3	cyclictest	765253	-21	kworker/u8:2+flush-8:0	23:46:15	0
573235	99	40	35,4	cyclictest	715569	-21	kworker/u8:0+flush-8:0	22:11:26	0
573235	99	40	32,5	cyclictest	615006	-21	latency_hist	19:50:01	0
573240	99	39	34,4	cyclictest	573073	-21	kworker/u8:1+flush-8:0	20:11:29	1
573240	99	39	34,3	cyclictest	809758	-21	kworker/u8:0+events_unbound	23:20:01	1
573240	99	39	27,8	cyclictest	282	-21	systemd-journal	23:36:14	1
573235	99	39	32,5	cyclictest	282	-21	systemd-journal	22:42:54	0
573240	99	38	34,3	cyclictest	563296	-21	kworker/u8:3+flush-8:0	19:31:16	1
573240	99	38	33,4	cyclictest	715569	-21	kworker/u8:0+flush-8:0	22:16:23	1
573235	99	38	33,3	cyclictest	720549	-21	kworker/u8:1+flush-8:0	21:46:23	0
573240	99	37	33,3	cyclictest	563296	-21	kworker/u8:3+flush-8:0	20:56:24	1
573240	99	37	33,3	cyclictest	531737	-21	kworker/u8:2+events_unbound	19:16:26	1
573240	99	37	32,3	cyclictest	765253	-21	kworker/u8:2+events_unbound	22:36:23	1
573240	99	37	29,6	cyclictest	700519	-21	latency_hist	21:25:01	1
573240	99	37	29,5	cyclictest	794749	-21	latency_hist	23:00:01	1
573235	99	37	33,3	cyclictest	685874	-21	kworker/u8:0+flush-8:0	21:21:24	0
573235	99	37	29,6	cyclictest	282	-21	systemd-journal	20:05:00	0
573240	99	36	31,4	cyclictest	531737	-21	kworker/u8:2+events_unbound	19:41:20	1
573240	99	36	31,3	cyclictest	765253	-21	kworker/u8:2+flush-8:0	23:41:16	1
573240	99	36	30,5	cyclictest	661155	-21	kworker/u8:1+flush-8:0	21:01:22	1
573235	99	36	32,3	cyclictest	531737	-21	kworker/u8:2+flush-8:0	20:06:25	0
573235	99	36	29,5	cyclictest	563296	-21	kworker/u8:3+events_unbound	20:56:20	0
573235	99	36	27,6	cyclictest	282	-21	systemd-journal	23:21:14	0
573240	99	35	31,2	cyclictest	602398	-21	kthreadcore	19:36:18	1
573240	99	35	30,4	cyclictest	685874	-21	kworker/u8:0+events_unbound	21:16:25	1
573240	99	35	30,3	cyclictest	563296	-21	kworker/u8:3+flush-8:0	19:21:26	1
573240	99	35	29,4	cyclictest	819967	-21	apt-get	23:26:10	1
573240	99	35	29,4	cyclictest	765253	-21	kworker/u8:2+flush-8:0	00:20:31	1
573240	99	35	28,5	cyclictest	790032	-21	kworker/u8:3+flush-8:0	23:06:20	1
573240	99	35	27,6	cyclictest	765253	-21	kworker/u8:2+flush-8:0	00:06:20	1
573235	99	35	27,6	cyclictest	858385	-21	ntpq	00:01:22	0
573240	99	34	30,3	cyclictest	854510	-21	kworker/u8:1+events_unbound	00:01:26	1
573240	99	34	30,3	cyclictest	809758	-21	kworker/u8:0+flush-8:0	00:31:27	1
573240	99	34	30,2	cyclictest	712866	-21	kthreadcore	21:36:16	1
573240	99	34	29,3	cyclictest	563296	-21	kworker/u8:3+events_unbound	21:41:09	1
573240	99	34	29,3	cyclictest	531737	-21	kworker/u8:2+events_unbound	19:11:15	1
573240	99	34	28,4	cyclictest	685875	-21	kworker/u8:4+events_unbound	21:26:20	1
573240	99	34	26,6	cyclictest	282	-21	systemd-journal	00:15:25	1
573240	99	34	25,6	cyclictest	619938	-21	latency_hist	19:55:01	1
573235	99	34	28,4	cyclictest	720549	-21	kworker/u8:1+flush-8:0	22:06:18	0
573235	99	34	28,4	cyclictest	655744	-21	latency_hist	20:40:00	0
573235	99	34	28,4	cyclictest	655744	-21	latency_hist	20:40:00	0
573235	99	34	27,5	cyclictest	719417	-21	ntpq	21:41:19	0
573235	99	34	24,8	cyclictest	282	-21	systemd-journal	19:55:00	0
573235	99	34	22,10	cyclictest	715332	-21	systemctl	21:40:00	0
573242	99	33	26,5	cyclictest	805029	-21	cp	23:10:01	2
573242	99	33	23,8	cyclictest	844344	-21	cat	23:50:01	2
573240	99	33	29,3	cyclictest	874276	-21	kworker/u8:3+events_unbound	00:26:20	1
573240	99	33	27,4	cyclictest	531737	-21	kworker/u8:2+flush-8:0	19:26:21	1
573235	99	33	27,4	cyclictest	854510	-21	kworker/u8:1+flush-8:0	00:11:16	0
573235	99	33	23,8	cyclictest	282	-21	systemd-journal	22:05:00	0
573240	99	32	28,2	cyclictest	563296	-21	kworker/u8:3+events_unbound	20:31:10	1
573240	99	32	27,4	cyclictest	765253	-21	kworker/u8:2+flush-8:0	23:56:25	1
573240	99	32	26,5	cyclictest	563296	-21	kworker/u8:3+flush-8:0	20:46:21	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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