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
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.

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 highest latencies:

System rack2slot7s.osadl.org (updated Wed Jan 07, 2026 07:55:35)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2273843	99	116	72,39	cyclictest	564	-21	dbus-daemon	06:10:02	0
2273848	99	75	64,7	cyclictest	3079919	-21	sh	06:10:03	1
2273852	99	67	57,7	cyclictest	2496557	-21	sh	05:39:57	2
2273848	99	64	53,7	cyclictest	2580455	-21	execl	05:50:01	1
2273852	99	59	39,13	cyclictest	36	-21	ksoftirqd/2	05:50:01	2
2273848	99	57	45,9	cyclictest	2496832	-21	sh	05:39:59	1
2273852	99	55	46,5	cyclictest	2562939	-21	sh	05:42:55	2
2273843	99	54	42,6	cyclictest	2406049	-21	spawn	05:34:57	0
2273848	99	52	43,6	cyclictest	2531706	-21	sh	05:41:38	1
2273852	99	51	43,5	cyclictest	3079235	-21	sort	06:10:00	2
2273848	99	51	39,9	cyclictest	0	-21	swapper/1	05:50:04	1
2273843	99	51	45,4	cyclictest	3147225	-21	grep	06:12:42	0
2273852	99	48	40,5	cyclictest	3095805	-21	sh	06:10:40	2
2273848	99	46	37,6	cyclictest	3100060	-21	sh	06:10:49	1
2273843	99	45	38,4	cyclictest	2508029	-21	wc	05:40:39	0
2273843	99	45	34,8	cyclictest	2278938	-21	fstime	05:25:01	0
2273843	99	45	28,14	cyclictest	2580455	-21	execl	05:49:56	0
2273852	99	44	36,5	cyclictest	2457821	-21	spawn	05:35:01	2
2273848	99	44	3,29	cyclictest	2153214	-21	cups-browsed	06:29:56	1
2273848	99	44	3,29	cyclictest	2153214	-21	cups-browsed	06:29:56	1
2273852	99	43	34,6	cyclictest	2581571	-21	Run	05:50:07	2
2273843	99	43	31,9	cyclictest	0	-21	swapper/0	05:50:48	0
2273852	99	42	34,5	cyclictest	2275126	-21	mailstats	05:10:01	2
2273852	99	42	34,5	cyclictest	2275126	-21	mailstats	05:10:01	2
2273843	99	42	29,11	cyclictest	2585309	-21	sh	06:01:31	0
2273852	99	41	30,8	cyclictest	2824828	-21	spawn	06:03:45	2
2273848	99	41	32,6	cyclictest	2708151	-21	spawn	06:03:16	1
2273843	99	41	27,11	cyclictest	2278194	-21	wc	05:19:57	0
2273848	99	40	31,6	cyclictest	0	-21	swapper/1	05:34:58	1
2273852	99	39	32,3	cyclictest	0	-21	swapper/2	05:15:03	2
2273852	99	39	32,3	cyclictest	0	-21	swapper/2	05:15:03	2
2273852	99	39	30,6	cyclictest	3160923	-21	systemd-run	06:35:01	2
2273852	99	39	2,34	cyclictest	2278938	-21	fstime	05:24:56	2
2273848	99	39	31,5	cyclictest	3157632	-21	munin-plugin-st	06:25:00	1
2273848	99	39	31,5	cyclictest	3157632	-21	munin-plugin-st	06:25:00	1
2273848	99	39	31,5	cyclictest	2276567	-21	grep	05:15:00	1
2273848	99	39	31,5	cyclictest	2276567	-21	grep	05:15:00	1
2273848	99	38	30,5	cyclictest	3156242	-21	latency_hist	06:20:02	1
2273848	99	38	30,5	cyclictest	3156242	-21	latency_hist	06:20:02	1
2273843	99	38	32,3	cyclictest	0	-21	swapper/0	06:30:00	0
2273843	99	38	32,3	cyclictest	0	-21	swapper/0	06:30:00	0
2273843	99	38	31,4	cyclictest	2496832	-21	tee	05:39:59	0
2273843	99	37	29,5	cyclictest	3157691	-21	systemd-run	06:25:01	0
2273843	99	37	29,5	cyclictest	3157691	-21	systemd-run	06:25:01	0
2273848	99	36	28,5	cyclictest	3160931	-21	systemctl	06:35:01	1
2273848	99	36	28,5	cyclictest	2279363	-21	kernelversion	05:24:50	1
2273848	99	36	28,5	cyclictest	1	-21	systemd	05:30:02	1
2273852	99	35	29,3	cyclictest	3162036	-21	ls	06:40:00	2
2273852	99	35	27,5	cyclictest	3156415	-21	latency_hist	06:20:03	2
2273852	99	35	27,5	cyclictest	3156415	-21	latency_hist	06:20:03	2
2273852	99	34	26,5	cyclictest	2281311	-21	pipe	05:30:02	2
2273852	99	34	26,5	cyclictest	2273781	-21	/usr/sbin/munin	05:05:02	2
2273852	99	34	18,6	cyclictest	17	1	rcu_preempt	06:29:57	2
2273852	99	34	18,6	cyclictest	17	1	rcu_preempt	06:29:57	2
2273843	99	34	28,4	cyclictest	2583506	-21	fstime	05:56:13	0
2273852	99	33	25,5	cyclictest	3157072	-21	fschecks_count	06:24:48	2
2273852	99	33	25,5	cyclictest	3157072	-21	fschecks_count	06:24:48	2
2273852	99	33	24,3	cyclictest	0	-21	swapper/2	05:55:11	2
2273848	99	33	24,5	cyclictest	2274010	-21	latency_hist	05:05:02	1
2273843	99	33	25,6	cyclictest	2276638	-21	runlevel	05:15:01	0
2273843	99	33	25,6	cyclictest	2276638	-21	runlevel	05:15:01	0
2273852	99	32	24,3	cyclictest	0	-21	swapper/2	05:19:52	2
2273848	99	31	20,3	cyclictest	17	1	rcu_preempt	05:59:58	1
2273848	99	31	16,11	cyclictest	2276558	-21	sh	05:15:04	1
2273843	99	31	24,4	cyclictest	2275330	-21	threads	05:10:03	0
2273843	99	31	24,4	cyclictest	2275330	-21	threads	05:10:03	0
2273848	99	30	21,5	cyclictest	2275121	-21	systemd-run	05:10:01	1
2273848	99	30	21,5	cyclictest	2275121	-21	systemd-run	05:10:01	1
2273843	99	29	20,7	cyclictest	3160854	-21	tail	06:35:00	0
2273843	99	28	23,3	cyclictest	2281795	-21	latency_hist	05:30:03	0
2273843	99	27	20,4	cyclictest	3156177	-21	systemctl	06:20:01	0
2273843	99	27	20,4	cyclictest	3156177	-21	systemctl	06:20:01	0
2273843	99	27	1,18	cyclictest	3162106	-21	ls	06:40:01	0
2273843	99	24	1,5	cyclictest	2273781	-21	munin-run	05:05:01	0
2273848	99	22	13,6	cyclictest	3162148	-21	sensors_volt	06:40:02	1
2273853	99	20	5,9	cyclictest	0	-21	swapper/3	05:57:50	3
2273853	99	19	5,4	cyclictest	0	-21	swapper/3	05:24:54	3
2273853	99	19	4,8	cyclictest	0	-21	swapper/3	05:54:23	3
2273853	99	18	2,10	cyclictest	0	-21	swapper/3	06:10:01	3
2273853	99	17	4,9	cyclictest	0	-21	swapper/3	05:49:52	3
2273853	99	17	2,9	cyclictest	0	-21	swapper/3	05:39:57	3
2273853	99	17	2,10	cyclictest	0	-21	swapper/3	06:11:48	3
2273853	99	16	4,6	cyclictest	0	-21	swapper/3	05:35:01	3
2273853	99	16	2,7	cyclictest	0	-21	swapper/3	06:00:12	3
2273853	99	16	2,10	cyclictest	0	-21	swapper/3	05:41:50	3
2273853	99	15	2,7	cyclictest	0	-21	swapper/3	05:14:54	3
2273853	99	15	2,7	cyclictest	0	-21	swapper/3	05:14:54	3
2273853	99	14	2,7	cyclictest	0	-21	swapper/3	06:40:02	3
2273853	99	14	2,5	cyclictest	0	-21	swapper/3	05:05:01	3
2273853	99	13	1,7	cyclictest	0	-21	swapper/3	06:24:54	3
2273853	99	13	1,7	cyclictest	0	-21	swapper/3	06:24:54	3
2273853	99	12	6,4	cyclictest	0	-21	swapper/3	06:20:01	3
2273853	99	12	6,4	cyclictest	0	-21	swapper/3	06:20:01	3
2273853	99	12	2,6	cyclictest	0	-21	swapper/3	05:20:01	3
2273853	99	11	6,3	cyclictest	0	-21	swapper/3	06:35:00	3
2273853	99	11	6,3	cyclictest	0	-21	swapper/3	06:29:56	3
2273853	99	11	6,3	cyclictest	0	-21	swapper/3	06:29:56	3
2273853	99	11	6,3	cyclictest	0	-21	swapper/3	05:09:57	3
2273853	99	11	6,3	cyclictest	0	-21	swapper/3	05:09:57	3
2273853	99	11	5,3	cyclictest	0	-21	swapper/3	05:28:06	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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