OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #2, slot #7

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 792 highest latencies:

System rack2slot7s.osadl.org (updated Wed Dec 31, 2025 07:55:38)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2397991	99	75	67,4	cyclictest	0	-21	swapper/2	05:50:00	2
2397989	99	60	39,17	cyclictest	2530543	-21	spawn	05:34:50	0
2397991	99	59	50,6	cyclictest	3196919	-21	wc	06:09:56	2
2397990	99	55	41,9	cyclictest	2978787	-21	spawn	06:03:53	1
2397991	99	54	44,6	cyclictest	3241533	-21	multi.sh	06:11:41	2
2397989	99	54	29,22	cyclictest	3123839	-21	sh	06:06:59	0
2397990	99	53	44,6	cyclictest	3277722	-21	systemd-run	06:25:01	1
2397989	99	53	46,4	cyclictest	0	-21	swapper/0	05:50:00	0
2397989	99	53	20,30	cyclictest	3242451	-21	multi.sh	06:11:43	0
2397990	99	52	44,5	cyclictest	3221656	-21	rm	06:10:56	1
2397989	99	52	27,22	cyclictest	2636456	-21	sh	05:40:49	0
2397990	99	49	40,6	cyclictest	3198927	-21	sh	06:10:01	1
2397990	99	49	40,5	cyclictest	2702483	-21	execl	05:50:02	1
2397990	99	49	40,5	cyclictest	2677401	-21	sh	05:42:35	1
2397991	99	48	40,5	cyclictest	2683863	-21	sh	05:42:51	2
2397989	99	48	26,18	cyclictest	124	50	irq/32-eth0	05:39:53	0
2397990	99	47	36,4	cyclictest	0	-21	swapper/1	05:34:56	1
2397991	99	46	38,5	cyclictest	2404144	-21	sed	05:25:00	2
2397991	99	46	37,5	cyclictest	2707388	-21	Run	06:01:57	2
2397990	99	45	36,6	cyclictest	2399416	-21	cron	05:10:01	1
2397990	99	44	35,6	cyclictest	2619918	-21	sh	05:39:53	1
2397990	99	43	35,5	cyclictest	2400749	-21	munin-run	05:15:01	1
2397989	99	43	4,10	cyclictest	2398895	-21	ntpq	05:09:52	0
2397989	99	43	22,18	cyclictest	2925525	-21	spawn	06:03:41	0
2397989	99	43	1,9	cyclictest	2706606	-21	switchtime	05:59:57	0
2397991	99	42	34,5	cyclictest	3277722	-21	systemd-run	06:25:01	2
2397991	99	41	33,5	cyclictest	2619247	-21	sh	05:39:50	2
2397991	99	41	32,5	cyclictest	2702481	-21	execl	05:50:04	2
2397991	99	41	32,5	cyclictest	2702481	-21	execl	05:50:04	2
2397989	99	41	31,4	cyclictest	0	-21	swapper/0	05:24:52	0
2397989	99	41	2,6	cyclictest	3281881	-21	ntpq	06:39:51	0
2397989	99	40	12,25	cyclictest	0	-21	swapper/0	05:05:01	0
2397989	99	39	16,20	cyclictest	2703930	-21	execl	05:50:27	0
2397989	99	39	16,20	cyclictest	2703930	-21	execl	05:50:27	0
2397990	99	38	29,5	cyclictest	2705263	-21	grep	05:55:01	1
2397990	99	38	29,5	cyclictest	2705263	-21	grep	05:55:01	1
2397989	99	38	32,4	cyclictest	1	-21	systemd	06:20:01	0
2397989	99	38	1,11	cyclictest	2400411	-21	ntpq	05:14:54	0
2397991	99	37	6,6	cyclictest	17	1	rcu_preempt	05:29:53	2
2397990	99	37	28,5	cyclictest	2705508	-21	Run	05:55:14	1
2397990	99	37	27,7	cyclictest	564	-21	dbus-daemon	06:40:01	1
2397989	99	37	2,5	cyclictest	3280380	-21	ntpq	06:34:48	0
2397991	99	36	31,2	cyclictest	0	-21	swapper/2	05:35:01	2
2397989	99	36	9,7	cyclictest	3278135	-21	/usr/sbin/munin	06:25:03	0
2397990	99	35	26,6	cyclictest	2278081	-21	cups-browsed	05:19:00	1
2397989	99	35	3,6	cyclictest	2402125	-21	ntpq	05:19:54	0
2397989	99	35	1,14	cyclictest	3277653	-21	cron	06:25:01	0
2397991	99	34	28,3	cyclictest	0	-21	swapper/2	05:15:01	2
2397991	99	34	24,6	cyclictest	2399417	-21	cron	05:10:01	2
2397990	99	34	1,29	cyclictest	2402969	-21	fstime	05:24:53	1
2397989	99	34	2,8	cyclictest	577	-21	mta-sts-daemon	05:28:01	0
2397991	99	32	27,2	cyclictest	0	-21	swapper/2	06:40:01	2
2397991	99	31	21,7	cyclictest	2705606	-21	pipe	05:58:38	2
2397991	99	29	4,16	cyclictest	577	-21	mta-sts-daemon	06:19:53	2
2397990	99	29	21,5	cyclictest	3278141	-21	unixbench_multi	06:25:03	1
2397990	99	29	20,4	cyclictest	0	-21	swapper/1	06:20:00	1
2397991	99	28	22,3	cyclictest	0	-21	swapper/2	05:20:02	2
2397990	99	26	19,3	cyclictest	0	-21	swapper/1	05:30:01	1
2397990	99	26	17,5	cyclictest	3279892	-21	aten_r2power_vo	06:34:38	1
2397991	99	24	9,9	cyclictest	577	-21	mta-sts-daemon	06:29:50	2
2397991	99	23	17,3	cyclictest	0	-21	swapper/2	06:30:57	2
2397991	99	23	17,2	cyclictest	0	-21	swapper/2	05:05:01	2
2397990	99	20	14,3	cyclictest	0	-21	swapper/1	05:05:02	1
2397992	99	18	3,5	cyclictest	0	-21	swapper/3	05:29:53	3
2397992	99	18	2,9	cyclictest	0	-21	swapper/3	05:49:56	3
2397992	99	16	2,9	cyclictest	0	-21	swapper/3	05:39:49	3
2397992	99	16	1,8	cyclictest	0	-21	swapper/3	06:09:51	3
2397992	99	16	1,7	cyclictest	0	-21	swapper/3	05:34:52	3
2397992	99	16	1,6	cyclictest	0	-21	swapper/3	06:39:51	3
2397992	99	15	3,6	cyclictest	0	-21	swapper/3	05:56:15	3
2397992	99	14	4,6	cyclictest	0	-21	swapper/3	05:44:37	3
2397992	99	14	1,7	cyclictest	0	-21	swapper/3	05:51:58	3
2397992	99	14	1,7	cyclictest	0	-21	swapper/3	05:51:58	3
2397992	99	14	1,6	cyclictest	0	-21	swapper/3	06:24:51	3
2397992	99	14	1,6	cyclictest	0	-21	swapper/3	05:24:49	3
2397992	99	14	1,5	cyclictest	0	-21	swapper/3	06:34:46	3
2397992	99	14	1,5	cyclictest	0	-21	swapper/3	05:09:51	3
2397992	99	13	2,7	cyclictest	0	-21	swapper/3	06:10:10	3
2397992	99	13	1,5	cyclictest	0	-21	swapper/3	06:19:52	3
2397992	99	12	3,6	cyclictest	0	-21	swapper/3	06:00:22	3
2397992	99	12	1,6	cyclictest	0	-21	swapper/3	05:19:50	3
2397992	99	11	2,5	cyclictest	0	-21	swapper/3	05:15:02	3
2397992	99	9	1,4	cyclictest	0	-21	swapper/3	05:05:02	3
2397992	99	8	2,5	cyclictest	0	-21	swapper/3	06:30:02	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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