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 100 highest latencies:

System r0s0s.osadl.org (updated Wed Mar 11, 2026 00:46:23)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1737931	2	303	284,12	sleep1	0	-21	swapper/1	19:08:04	1
1737754	2	299	285,9	sleep6	0	-21	swapper/6	19:05:36	6
1737356	2	295	278,11	sleep2	0	-21	swapper/2	19:05:32	2
1738000	2	294	277,10	sleep3	0	-21	swapper/3	19:09:02	3
1737828	2	292	272,13	sleep0	0	-21	swapper/0	19:06:34	0
1737986	2	288	269,12	sleep7	0	-21	swapper/7	19:08:50	7
1737842	2	288	268,13	sleep5	0	-21	swapper/5	19:06:47	5
1738041	2	284	265,12	sleep4	0	-21	swapper/4	19:09:36	4
1738544	99	50	48,2	cyclictest	1865488	-21	kworker/u16:2+events_unbound	23:25:24	4
1738540	99	41	40,1	cyclictest	1837450	-21	kworker/u16:3+flush-8:0	23:20:00	0
1738545	99	37	34,2	cyclictest	1867248	-21	collect2	23:20:24	5
1738544	99	36	34,2	cyclictest	1753785	-21	kworker/u16:0+flush-8:0	20:10:00	4
1738544	99	36	34,2	cyclictest	1753785	-21	kworker/u16:0+flush-8:0	20:00:29	4
1738546	99	35	0,30	cyclictest	0	-21	swapper/6	00:39:17	6
1738544	99	35	29,6	cyclictest	1893573	-21	kworker/u16:3+flush-8:0	00:35:58	4
1738547	99	34	31,2	cyclictest	1766908	-21	/usr/sbin/munin	20:05:22	7
1738547	99	33	30,2	cyclictest	449069	-21	snmpd	22:08:04	7
1738547	99	33	0,30	cyclictest	0	-21	swapper/7	20:11:55	7
1738546	99	33	30,2	cyclictest	449069	-21	snmpd	22:05:25	6
1738545	99	33	0,30	cyclictest	0	-21	swapper/5	23:58:19	5
1738544	99	33	31,1	cyclictest	1891842	-21	diskstats	00:10:12	4
1738544	99	33	31,1	cyclictest	1844418	-21	ntpq	22:35:24	4
1738544	99	33	31,1	cyclictest	1823443	-21	fail2ban-client	21:55:13	4
1738544	99	33	31,1	cyclictest	1748228	-21	python3	19:25:28	4
1738544	99	33	30,3	cyclictest	449069	-21	snmpd	21:37:55	4
1738544	99	33	1,32	cyclictest	1886607	-21	fail2ban-client	00:00:14	4
1738543	99	33	30,2	cyclictest	449069	-21	snmpd	22:33:05	3
1738543	99	33	30,2	cyclictest	449069	-21	snmpd	21:02:37	3
1738543	99	33	0,30	cyclictest	0	-21	swapper/3	21:06:57	3
1738542	99	33	30,2	cyclictest	449069	-21	snmpd	23:39:52	2
1738542	99	33	30,2	cyclictest	449069	-21	snmpd	20:14:13	2
1738542	99	33	30,2	cyclictest	449069	-21	snmpd	00:39:23	2
1738540	99	33	1,30	cyclictest	17	1	rcu_preempt	23:58:58	0
1738547	99	32	30,2	cyclictest	449069	-21	snmpd	00:12:58	7
1738547	99	32	30,1	cyclictest	449069	-21	snmpd	19:42:18	7
1738547	99	32	29,2	cyclictest	449069	-21	snmpd	23:17:45	7
1738547	99	32	0,31	cyclictest	0	-21	swapper/7	19:10:23	7
1738546	99	32	30,1	cyclictest	449069	-21	snmpd	22:53:39	6
1738546	99	32	30,1	cyclictest	449069	-21	snmpd	21:55:52	6
1738546	99	32	30,1	cyclictest	449069	-21	snmpd	20:48:50	6
1738546	99	32	29,2	cyclictest	449069	-21	snmpd	20:56:56	6
1738546	99	32	29,2	cyclictest	449069	-21	snmpd	19:31:00	6
1738546	99	32	0,30	cyclictest	0	-21	swapper/6	23:06:21	6
1738545	99	32	30,2	cyclictest	449069	-21	snmpd	23:04:42	5
1738545	99	32	29,2	cyclictest	449069	-21	snmpd	20:45:53	5
1738545	99	32	0,30	cyclictest	0	-21	swapper/5	23:47:57	5
1738544	99	32	31,1	cyclictest	1836607	-21	ntpq	22:20:24	4
1738544	99	32	31,1	cyclictest	1729918	-21	kworker/u16:2+flush-8:0	19:20:32	4
1738544	99	32	30,2	cyclictest	1781870	-21	kworker/u16:0+events_unbound	21:00:23	4
1738544	99	32	30,1	cyclictest	1899504	-21	hddtemp_smartct	00:25:14	4
1738544	99	32	29,2	cyclictest	449069	-21	snmpd	22:49:54	4
1738544	99	32	29,2	cyclictest	449069	-21	snmpd	00:17:11	4
1738544	99	32	1,31	cyclictest	1768093	-21	ntpq	20:05:26	4
1738543	99	32	30,1	cyclictest	449069	-21	snmpd	20:37:47	3
1738543	99	32	30,1	cyclictest	449069	-21	snmpd	20:37:47	3
1738543	99	32	29,2	cyclictest	449069	-21	snmpd	23:22:15	3
1738543	99	32	29,2	cyclictest	1892086	-21	cat	00:10:14	3
1738543	99	32	29,2	cyclictest	1818635	-21	cat	21:45:13	3
1738543	99	32	28,3	cyclictest	0	-21	swapper/3	20:04:01	3
1738543	99	32	0,30	cyclictest	0	-21	swapper/3	19:51:36	3
1738542	99	32	30,2	cyclictest	449069	-21	snmpd	20:02:26	2
1738542	99	32	29,2	cyclictest	449069	-21	snmpd	21:17:48	2
1738542	99	32	29,2	cyclictest	1851728	-21	cat	22:50:16	2
1738542	99	32	29,2	cyclictest	1744939	-21	cat	19:20:15	2
1738542	99	32	0,31	cyclictest	0	-21	swapper/2	22:01:43	2
1738541	99	32	30,2	cyclictest	516654	-21	ntpd	23:59:43	1
1738541	99	32	30,2	cyclictest	516654	-21	ntpd	22:39:43	1
1738541	99	32	30,2	cyclictest	516654	-21	ntpd	20:29:43	1
1738541	99	32	30,2	cyclictest	449069	-21	snmpd	23:39:34	1
1738541	99	32	30,2	cyclictest	449069	-21	snmpd	19:45:37	1
1738541	99	32	30,2	cyclictest	1752414	-21	cat	19:35:15	1
1738541	99	32	0,31	cyclictest	0	-21	swapper/1	23:25:15	1
1738541	99	32	0,31	cyclictest	0	-21	swapper/1	23:04:39	1
1738540	99	32	30,2	cyclictest	449069	-21	snmpd	21:19:09	0
1738540	99	32	0,31	cyclictest	0	-21	swapper/0	22:22:17	0
1738547	99	31	30,1	cyclictest	449069	-21	snmpd	22:26:23	7
1738547	99	31	29,2	cyclictest	449069	-21	snmpd	21:02:15	7
1738547	99	31	0,31	cyclictest	0	-21	swapper/7	00:23:23	7
1738547	99	31	0,31	cyclictest	0	-21	swapper/7	00:23:23	7
1738547	99	31	0,30	cyclictest	0	-21	swapper/7	23:46:25	7
1738547	99	31	0,30	cyclictest	0	-21	swapper/7	23:34:15	7
1738547	99	31	0,29	cyclictest	0	-21	swapper/7	22:33:35	7
1738547	99	31	0,28	cyclictest	0	-21	swapper/7	20:04:34	7
1738547	99	31	0,1	cyclictest	0	-21	swapper/7	21:32:21	7
1738547	99	31	0,1	cyclictest	0	-21	swapper/7	19:27:27	7
1738546	99	31	30,1	cyclictest	449069	-21	snmpd	22:00:49	6
1738546	99	31	30,1	cyclictest	449069	-21	snmpd	21:18:03	6
1738546	99	31	29,2	cyclictest	449069	-21	snmpd	22:41:02	6
1738546	99	31	29,1	cyclictest	449069	-21	snmpd	20:13:34	6
1738546	99	31	28,2	cyclictest	449069	-21	snmpd	21:03:39	6
1738546	99	31	0,30	cyclictest	0	-21	swapper/6	21:29:57	6
1738546	99	31	0,30	cyclictest	0	-21	swapper/6	19:18:42	6
1738546	99	31	0,30	cyclictest	0	-21	swapper/6	00:24:14	6
1738546	99	31	0,30	cyclictest	0	-21	swapper/6	00:24:14	6
1738546	99	31	0,30	cyclictest	0	-21	swapper/6	00:07:46	6
1738546	99	31	0,1	cyclictest	0	-21	swapper/6	22:38:38	6
1738546	99	31	0,1	cyclictest	0	-21	swapper/6	22:16:32	6
1738546	99	31	0,1	cyclictest	0	-21	swapper/6	22:13:17	6
1738546	99	31	0,1	cyclictest	0	-21	swapper/6	00:31:44	6
1738545	99	31	30,1	cyclictest	449069	-21	snmpd	21:12:12	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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