OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #8, 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.
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 rack8slot4s.osadl.org (updated Fri Dec 05, 2025 00:44:47)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
958447	2	237	174,20	sleep7	0	-21	swapper/7	19:07:12	7
958365	2	231	170,18	sleep4	0	-21	swapper/4	19:06:06	4
958398	2	230	168,21	sleep6	0	-21	swapper/6	19:06:32	6
957104	2	226	171,18	sleep3	0	-21	swapper/3	19:05:16	3
958572	2	214	181,21	sleep1	0	-21	swapper/1	19:09:00	1
958325	2	211	173,25	sleep0	0	-21	swapper/0	19:05:29	0
958465	2	210	180,19	sleep5	0	-21	swapper/5	19:07:27	5
958536	2	208	175,21	sleep2	0	-21	swapper/2	19:08:29	2
958885	99	26	24,1	cyclictest	1060610	-21	sh	22:05:00	7
958885	99	26	0,25	cyclictest	1118068	-21	turbostat.cron	23:45:00	7
958878	99	26	23,2	cyclictest	1054897	-21	perf	21:55:00	5
958869	99	26	24,1	cyclictest	0	-21	swapper/2	21:40:00	2
958885	99	25	0,24	cyclictest	997330	-21	apt-get	20:15:12	7
958878	99	25	0,3	cyclictest	1008384	-21	sh	20:35:01	5
958878	99	25	0,24	cyclictest	0	-21	swapper/5	20:00:02	5
958885	99	24	21,2	cyclictest	965173	-21	cron	19:20:00	7
958885	99	24	0,22	cyclictest	1149804	-21	turbostat	00:39:59	7
958878	99	24	22,1	cyclictest	0	-21	swapper/5	21:40:00	5
958878	99	24	21,2	cyclictest	1057761	-21	awk	22:00:00	5
958875	99	24	22,1	cyclictest	0	-21	swapper/4	22:05:00	4
958875	99	24	0,23	cyclictest	991625	-21	apt-get	20:05:13	4
958871	99	24	0,24	cyclictest	1057787	-21	awk	22:00:00	3
958871	99	24	0,23	cyclictest	0	-21	swapper/3	23:35:00	3
958871	99	24	0,23	cyclictest	0	-21	swapper/3	21:30:01	3
958871	99	24	0,22	cyclictest	1052457	-21	apt-get	21:50:11	3
958871	99	24	0,1	cyclictest	1143828	-21	turbostat.cron	00:30:00	3
958871	99	24	0,1	cyclictest	1143828	-21	turbostat.cron	00:29:59	3
958885	99	23	21,1	cyclictest	1124205	-21	apt-get	23:55:15	7
958885	99	23	21,1	cyclictest	1008354	-21	munin-run	20:35:01	7
958885	99	23	0,22	cyclictest	0	-21	swapper/7	22:25:00	7
958885	99	23	0,22	cyclictest	0	-21	swapper/7	20:00:15	7
958880	99	23	22,1	cyclictest	1017883	-21	apt-get	20:50:16	6
958880	99	23	0,23	cyclictest	1109507	-21	idleruntime-cro	23:30:00	6
958880	99	23	0,23	cyclictest	0	-21	swapper/6	22:30:16	6
958880	99	23	0,22	cyclictest	0	-21	swapper/6	20:00:14	6
958880	99	23	0,1	cyclictest	0	-21	swapper/6	21:35:01	6
958878	99	23	21,1	cyclictest	1121349	-21	apt-get	23:50:12	5
958878	99	23	21,1	cyclictest	1109912	-21	apt-get	23:30:13	5
958878	99	23	0,22	cyclictest	988073	-21	munin-run	20:00:00	5
958878	99	23	0,22	cyclictest	0	-21	swapper/5	22:15:11	5
958878	99	23	0,22	cyclictest	0	-21	swapper/5	21:20:13	5
958875	99	23	23,0	cyclictest	0	-21	swapper/4	20:15:13	4
958875	99	23	0,22	cyclictest	965199	-21	cat	19:19:59	4
958871	99	23	22,1	cyclictest	0	-21	swapper/3	20:15:12	3
958871	99	23	0,22	cyclictest	0	-21	swapper/3	21:10:12	3
958871	99	23	0,22	cyclictest	0	-21	swapper/3	19:40:12	3
958871	99	23	0,22	cyclictest	0	-21	swapper/3	19:40:11	3
958871	99	23	0,22	cyclictest	0	-21	swapper/3	00:00:00	3
958869	99	23	21,1	cyclictest	1061041	-21	apt-get	22:05:14	2
958869	99	23	0,22	cyclictest	1011474	-21	munin-run	20:40:01	2
958865	99	23	21,1	cyclictest	1069203	-21	awk	22:20:00	1
958865	99	23	19,3	cyclictest	1052040	-21	basename	21:50:00	1
958865	99	23	0,22	cyclictest	0	-21	swapper/1	00:25:17	1
958865	99	23	0,22	cyclictest	0	-21	swapper/1	00:25:17	1
958860	99	23	0,22	cyclictest	1126676	-21	awk	00:00:00	0
958860	99	23	0,22	cyclictest	1109489	-21	idleruntime-cro	23:29:59	0
958860	99	23	0,22	cyclictest	0	-21	swapper/0	19:10:13	0
958860	99	23	0,22	cyclictest	0	-21	swapper/0	00:10:14	0
958885	99	22	21,1	cyclictest	0	-21	swapper/7	20:50:15	7
958885	99	22	21,0	cyclictest	0	-21	swapper/7	22:05:14	7
958885	99	22	0,22	cyclictest	1052053	-21	idleruntime-cro	21:50:00	7
958885	99	22	0,21	cyclictest	0	-21	swapper/7	21:05:14	7
958885	99	22	0,1	cyclictest	1015029	-21	apt-get	20:45:13	7
958885	99	22	0,1	cyclictest	0	-21	swapper/7	22:40:14	7
958880	99	22	21,1	cyclictest	0	-21	swapper/6	20:50:01	6
958880	99	22	19,2	cyclictest	2970800	-21	systemd-journal	00:09:55	6
958880	99	22	0,22	cyclictest	76	1	rcuc/6	21:20:01	6
958880	99	22	0,21	cyclictest	0	-21	swapper/6	21:50:12	6
958880	99	22	0,21	cyclictest	0	-21	swapper/6	21:00:18	6
958880	99	22	0,1	cyclictest	1141406	-21	apt-get	00:25:17	6
958880	99	22	0,1	cyclictest	1141406	-21	apt-get	00:25:17	6
958880	99	22	0,1	cyclictest	0	-21	swapper/6	22:15:00	6
958878	99	22	22,0	cyclictest	0	-21	swapper/5	20:15:12	5
958878	99	22	21,1	cyclictest	1075601	-21	apt-get	22:30:16	5
958878	99	22	21,1	cyclictest	0	-21	swapper/5	23:40:13	5
958878	99	22	21,1	cyclictest	0	-21	swapper/5	19:20:00	5
958878	99	22	0,21	cyclictest	974198	-21	apt-get	19:35:13	5
958878	99	22	0,21	cyclictest	0	-21	swapper/5	22:45:14	5
958878	99	22	0,21	cyclictest	0	-21	swapper/5	22:20:13	5
958878	99	22	0,21	cyclictest	0	-21	swapper/5	20:50:16	5
958878	99	22	0,21	cyclictest	0	-21	swapper/5	20:45:01	5
958878	99	22	0,21	cyclictest	0	-21	swapper/5	00:00:15	5
958878	99	22	0,1	cyclictest	965633	-21	apt-get	19:20:11	5
958878	99	22	0,1	cyclictest	0	-21	swapper/5	20:40:01	5
958875	99	22	22,0	cyclictest	0	-21	swapper/4	23:05:14	4
958875	99	22	20,1	cyclictest	0	-21	swapper/4	22:05:14	4
958875	99	22	0,22	cyclictest	0	-21	swapper/4	21:55:00	4
958875	99	22	0,21	cyclictest	1087032	-21	apt-get	22:50:13	4
958875	99	22	0,21	cyclictest	0	-21	swapper/4	23:45:14	4
958875	99	22	0,21	cyclictest	0	-21	swapper/4	23:20:13	4
958875	99	22	0,21	cyclictest	0	-21	swapper/4	22:20:13	4
958875	99	22	0,21	cyclictest	0	-21	swapper/4	20:20:13	4
958875	99	22	0,0	cyclictest	0	-21	swapper/4	22:40:14	4
958875	99	22	0,0	cyclictest	0	-21	swapper/4	21:00:18	4
958871	99	22	21,0	cyclictest	0	-21	swapper/3	20:10:14	3
958871	99	22	0,21	cyclictest	0	-21	swapper/3	23:50:12	3
958871	99	22	0,21	cyclictest	0	-21	swapper/3	23:45:14	3
958871	99	22	0,21	cyclictest	0	-21	swapper/3	23:05:15	3
958871	99	22	0,21	cyclictest	0	-21	swapper/3	22:30:00	3
958871	99	22	0,21	cyclictest	0	-21	swapper/3	00:00:13	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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