OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #0

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
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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: performance
Compare latency of primary with shadow system

Characteristics of the 50 highest latencies:

System r0s0s.osadl.org (updated Wed Jan 07, 2026 12:46:23)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3050418	2	331	320,8	sleep1	0	-21	swapper/1	07:05:24	1
3051620	2	297	280,10	sleep6	0	-21	swapper/6	07:07:13	6
3051668	2	293	273,13	sleep0	0	-21	swapper/0	07:07:55	0
3051774	2	288	266,14	sleep3	0	-21	swapper/3	07:09:27	3
3051701	2	287	267,13	sleep4	0	-21	swapper/4	07:08:24	4
3051551	2	287	268,12	sleep7	0	-21	swapper/7	07:06:18	7
3051500	2	286	266,13	sleep5	0	-21	swapper/5	07:05:36	5
3049715	2	286	266,13	sleep2	0	-21	swapper/2	07:05:09	2
3052285	99	34	30,3	cyclictest	3179822	-21	ntpq	11:20:25	3
3052289	99	33	30,2	cyclictest	870	-21	snmpd	11:21:16	7
3052289	99	33	30,2	cyclictest	870	-21	snmpd	10:37:27	7
3052289	99	33	30,2	cyclictest	870	-21	snmpd	08:33:15	7
3052289	99	33	30,2	cyclictest	870	-21	snmpd	08:22:02	7
3052289	99	33	30,2	cyclictest	3212234	-21	cat	12:25:16	7
3052288	99	33	30,2	cyclictest	870	-21	snmpd	10:52:28	6
3052288	99	33	30,2	cyclictest	870	-21	snmpd	07:45:08	6
3052287	99	33	30,2	cyclictest	870	-21	snmpd	10:52:25	5
3052287	99	33	30,2	cyclictest	870	-21	snmpd	09:44:03	5
3052287	99	33	30,2	cyclictest	3114008	-21	cat	09:10:16	5
3052286	99	33	30,2	cyclictest	870	-21	snmpd	10:38:49	4
3052286	99	33	30,2	cyclictest	870	-21	snmpd	10:06:50	4
3052286	99	33	30,2	cyclictest	870	-21	snmpd	07:49:08	4
3052285	99	33	30,2	cyclictest	870	-21	snmpd	12:39:04	3
3052284	99	33	29,3	cyclictest	870	-21	snmpd	12:20:00	2
3052283	99	33	30,2	cyclictest	870	-21	snmpd	07:25:23	1
3052283	99	33	30,2	cyclictest	870	-21	snmpd	07:25:22	1
3052283	99	33	30,2	cyclictest	3091483	-21	cat	08:25:15	1
3052283	99	33	30,2	cyclictest	3083948	-21	cat	08:10:14	1
3052283	99	33	0,30	cyclictest	0	-21	swapper/1	11:40:41	1
3052289	99	32	30,1	cyclictest	870	-21	snmpd	10:58:49	7
3052289	99	32	30,1	cyclictest	870	-21	snmpd	07:44:26	7
3052289	99	32	29,2	cyclictest	870	-21	snmpd	08:48:15	7
3052289	99	32	29,2	cyclictest	3184436	-21	cat	11:30:13	7
3052289	99	32	0,30	cyclictest	0	-21	swapper/7	12:11:45	7
3052289	99	32	0,30	cyclictest	0	-21	swapper/7	11:01:22	7
3052289	99	32	0,30	cyclictest	0	-21	swapper/7	07:15:13	7
3052288	99	32	30,2	cyclictest	870	-21	snmpd	12:36:34	6
3052288	99	32	30,2	cyclictest	870	-21	snmpd	12:21:40	6
3052288	99	32	29,2	cyclictest	3093959	-21	cat	08:30:13	6
3052288	99	32	1,30	cyclictest	68	1	ktimers/6	07:17:22	6
3052288	99	32	0,30	cyclictest	0	-21	swapper/6	07:20:07	6
3052287	99	32	30,2	cyclictest	870	-21	snmpd	12:26:24	5
3052287	99	32	30,2	cyclictest	870	-21	snmpd	07:26:08	5
3052287	99	32	30,2	cyclictest	870	-21	snmpd	07:26:07	5
3052287	99	32	30,2	cyclictest	3071482	-21	cat	07:45:14	5
3052287	99	32	30,1	cyclictest	870	-21	snmpd	12:22:48	5
3052287	99	32	30,1	cyclictest	870	-21	snmpd	10:58:19	5
3052287	99	32	30,1	cyclictest	870	-21	snmpd	08:18:41	5
3052287	99	32	29,2	cyclictest	3202227	-21	cat	12:05:15	5
3052287	99	32	27,5	cyclictest	870	-21	snmpd	09:53:20	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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