OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, slot #1

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 rack4slot1s.osadl.org (updated Tue Dec 30, 2025 00:44:11)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
13635	2	88	0,2	sleep1	13637	-21	fschecks_count	21:05:32	1
13635	2	88	0,2	sleep1	13637	-21	fschecks_count	21:05:32	1
16911	2	73	0,3	sleep1	16915	-21	gltestperf	22:40:32	1
16911	2	73	0,3	sleep1	16915	-21	gltestperf	22:40:32	1
1222	2	73	0,3	sleep3	0	-21	swapper/3	20:30:36	3
1222	2	73	0,3	sleep3	0	-21	swapper/3	20:30:36	3
5806	2	70	0,3	sleep1	0	-21	swapper/1	19:15:41	1
2244	2	69	0,4	chrt	0	-21	swapper/3	22:00:33	3
2244	2	69	0,4	chrt	0	-21	swapper/3	22:00:33	3
7537	2	67	0,2	chrt	0	-21	swapper/3	22:15:29	3
7537	2	67	0,2	chrt	0	-21	swapper/3	22:15:29	3
8535	2	63	0,3	sleep3	0	-21	swapper/3	23:45:26	3
26535	2	62	0,2	sleep0	26643	-21	awk	00:30:43	0
26535	2	62	0,2	sleep0	26643	-21	awk	00:30:43	0
24055	2	61	0,2	sleep1	0	-21	swapper/1	20:05:34	1
24055	2	61	0,2	sleep1	0	-21	swapper/1	20:05:34	1
5303	2	59	0,2	sleep1	0	-21	swapper/1	22:10:24	1
5303	2	59	0,2	sleep1	0	-21	swapper/1	22:10:24	1
14993	2	59	0,1	sleep1	0	-21	swapper/1	19:40:37	1
14993	2	59	0,1	sleep1	0	-21	swapper/1	19:40:37	1
14505	2	59	0,2	sleep1	29	-21	ksoftirqd/1	22:35:17	1
20740	2	56	0,2	sleep0	20741	-21	/usr/sbin/munin	22:50:32	0
20740	2	56	0,2	sleep0	20741	-21	/usr/sbin/munin	22:50:32	0
28118	2	46	0,3	sleep1	28122	-21	gltestperf	23:10:31	1
28118	2	46	0,3	sleep1	28122	-21	gltestperf	23:10:31	1
8445	2	45	0,3	chrt	0	-21	swapper/3	23:45:22	3
30085	2	45	0,2	sleep0	0	-21	swapper/0	20:20:41	0
30085	2	45	0,2	sleep0	0	-21	swapper/0	20:20:41	0
2828	99	45	2,37	cyclictest	14579	-21	/usr/sbin/munin	00:00:32	0
2829	99	44	34,6	cyclictest	0	-21	swapper/1	00:00:24	1
2829	99	44	34,6	cyclictest	0	-21	swapper/1	00:00:24	1
2829	99	44	34,6	cyclictest	0	-21	swapper/1	00:00:24	1
17174	2	44	0,2	sleep3	0	-21	swapper/3	22:40:34	3
17174	2	44	0,2	sleep3	0	-21	swapper/3	22:40:34	3
3401	2	43	0,2	chrt	3400	-21	unixbench_multi	20:35:41	1
3401	2	43	0,2	chrt	3400	-21	unixbench_multi	20:35:41	1
24148	2	42	0,2	sleep0	24178	-21	proc_pri	20:05:38	0
24148	2	42	0,2	sleep0	24178	-21	proc_pri	20:05:38	0
9770	2	40	0,3	sleep3	0	-21	swapper/3	20:55:29	3
9770	2	40	0,3	sleep3	0	-21	swapper/3	20:55:29	3
9770	2	40	0,3	sleep3	0	-21	swapper/3	20:55:29	3
6040	2	40	0,3	sleep2	0	-21	swapper/2	22:10:33	2
2829	99	40	34,4	cyclictest	1	-21	systemd	20:20:17	1
2829	99	40	34,4	cyclictest	1	-21	systemd	20:20:17	1
30161	2	39	0,2	sleep1	0	-21	swapper/1	23:15:34	1
30161	2	39	0,2	sleep1	0	-21	swapper/1	23:15:34	1
25480	2	39	0,2	sleep1	25617	-21	uniq	00:30:32	1
25480	2	39	0,2	sleep1	25617	-21	uniq	00:30:32	1
8677	2	38	0,3	sleep2	0	-21	swapper/2	23:45:29	2
8677	2	38	0,3	sleep2	0	-21	swapper/2	23:45:29	2
6711	2	38	0,3	sleep1	0	-21	swapper/1	20:45:38	1
6711	2	38	0,3	sleep1	0	-21	swapper/1	20:45:38	1
2829	99	38	30,6	cyclictest	8904	-21	latency_hist	22:20:17	1
2829	99	38	30,6	cyclictest	8904	-21	latency_hist	22:20:17	1
2829	99	38	2,29	cyclictest	14908	-21	ntp_states	00:00:38	1
26289	2	38	0,2	sleep1	0	-21	swapper/1	20:10:41	1
6644	2	36	0,2	sleep3	0	-21	swapper/3	20:45:36	3
6644	2	36	0,2	sleep3	0	-21	swapper/3	20:45:36	3
2828	99	36	27,7	cyclictest	15696	-21	cron	19:45:17	0
2828	99	36	27,7	cyclictest	15696	-21	cron	19:45:17	0
24713	2	36	0,2	sleep1	24716	-21	unixbench_singl	00:25:40	1
24713	2	36	0,2	sleep1	24716	-21	unixbench_singl	00:25:40	1
22270	2	36	0,2	sleep1	22273	-21	grep	20:00:35	1
22270	2	36	0,2	sleep1	22273	-21	grep	20:00:35	1
16277	2	36	0,2	sleep3	0	-21	swapper/3	19:45:30	3
16277	2	36	0,2	sleep3	0	-21	swapper/3	19:45:30	3
2828	99	35	28,5	cyclictest	5160	-21	gltestperf	23:35:31	0
2828	99	35	28,5	cyclictest	5160	-21	gltestperf	23:35:31	0
2828	99	35	28,5	cyclictest	19889	-21	processes	21:20:36	0
2828	99	35	28,5	cyclictest	19889	-21	processes	21:20:36	0
2828	99	34	28,4	cyclictest	2827	-21	cyclictest	21:50:17	0
2828	99	34	28,4	cyclictest	2827	-21	cyclictest	21:50:17	0
2828	99	34	27,5	cyclictest	31323	-21	latency_hist	23:20:17	0
2828	99	34	27,5	cyclictest	31323	-21	latency_hist	23:20:17	0
2829	99	33	29,3	cyclictest	2827	-21	cyclictest	20:30:31	1
2829	99	33	29,3	cyclictest	2827	-21	cyclictest	20:30:31	1
2829	99	33	26,5	cyclictest	4824	-21	netstat	20:40:36	1
2829	99	33	26,5	cyclictest	4824	-21	netstat	20:40:36	1
2829	99	33	24,7	cyclictest	8775	-21	fschecks_time	23:45:29	1
2829	99	33	24,7	cyclictest	8775	-21	fschecks_time	23:45:29	1
2828	99	33	29,3	cyclictest	21285	-21	cron	20:00:16	0
2828	99	33	29,3	cyclictest	21285	-21	cron	20:00:16	0
2828	99	33	29,3	cyclictest	21285	-21	cron	20:00:16	0
2828	99	33	24,7	cyclictest	13050	-21	fschecks_count	22:30:31	0
2828	99	32	25,5	cyclictest	19357	-21	cut	21:20:29	0
17679	2	32	0,3	sleep1	0	-21	swapper/1	21:15:33	1
17679	2	32	0,3	sleep1	0	-21	swapper/1	21:15:33	1
3407	2	31	0,2	sleep1	3410	-21	wc	22:05:22	1
3407	2	31	0,2	sleep1	3410	-21	wc	22:05:22	1
2831	99	31	1,21	cyclictest	14020	-21	taskset	00:00:22	3
2831	99	31	1,21	cyclictest	14020	-21	taskset	00:00:22	3
2831	99	31	1,21	cyclictest	14020	-21	taskset	00:00:22	3
2829	99	31	25,4	cyclictest	545	-21	in:imuxsock	23:30:17	1
2829	99	31	25,4	cyclictest	2827	-21	cyclictest	20:52:45	1
2829	99	31	25,4	cyclictest	2827	-21	cyclictest	20:52:45	1
2829	99	31	25,4	cyclictest	20505	-21	fschecks_count	22:50:30	1
2829	99	31	25,4	cyclictest	20505	-21	fschecks_count	22:50:30	1
2829	99	31	25,4	cyclictest	1346	-21	avahi-daemon	21:45:37	1
2829	99	31	25,4	cyclictest	1346	-21	avahi-daemon	21:45:37	1
2828	99	31	24,5	cyclictest	31364	-21	kernelversion	20:25:34	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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