OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #f, 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
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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
Compare latency of primary with shadow system

Characteristics of the 792 highest latencies:

System rackfslot4s.osadl.org (updated Sun Jul 12, 2026 00:44:35)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
25190	2	122	0,2	sleep0	25193	-21	seq	23:58:33	0
27557	2	118	0,2	sleep0	27563	-21	gcc	00:01:51	0
21074	2	117	0,3	chrt	21075	-21	/usr/sbin/munin	23:52:12	0
8461	2	113	0,3	chrt	8462	-21	sh	22:45:01	0
18205	2	112	0,2	sleep0	18204	-21	seq	22:59:36	0
5749	2	111	0,2	sleep0	5751	-21	cut	20:10:42	0
28269	2	110	0,2	chrt	28271	-21	fschecks_count	19:55:35	0
23635	2	109	0,3	chrt	23636	-21	sh	19:47:24	0
10242	2	109	0,3	chrt	10240	-21	/usr/sbin/munin	22:47:01	0
22132	2	108	0,3	chrt	22133	-21	cat	20:36:34	0
16940	2	108	0,2	sleep0	16943	-21	cut	23:46:05	0
3420	2	107	0,1	sleep0	3419	-21	seq	00:14:50	0
1369	2	106	0,2	chrt	1371	-21	awk	19:11:25	0
31697	2	105	0,3	chrt	31698	-21	sleep	20:52:06	0
13921	2	105	0,3	chrt	13922	-21	sleep	22:04:32	0
31455	2	104	0,2	chrt	31456	-21	sleep	21:41:50	0
28825	2	103	0,2	chrt	28826	-21	runrttasks	21:37:53	0
4043	2	98	0,2	sleep0	4044	-21	chrt	21:49:49	0
11885	2	89	0,2	sleep0	11886	-21	cat	20:20:44	0
11012	2	87	0,2	sleep0	11008	-21	munin-plugin-st	20:20:00	0
26254	2	85	0,1	sleep0	26255	-21	mailstats	22:22:14	0
6379	2	82	0,2	sleep0	6378	-21	cut	19:20:27	0
29947	2	81	7,17	sleep0	30045	-21	sleep	19:05:36	0
23126	2	81	0,2	sleep0	23127	-21	ntpq	23:06:18	0
1195	2	81	0,2	sleep0	1197	-21	processes	23:22:12	0
2508	2	79	0,3	sleep0	2505	-21	sshd	20:57:35	0
13229	2	73	0,2	sleep0	13230	-21	seq	22:51:24	0
24917	2	72	0,2	sleep0	24918	-21	chrt	21:32:10	0
19341	2	72	0,3	sleep0	19342	-21	cat	23:00:58	0
22692	2	70	0,2	sleep0	22693	-21	chrt	22:16:59	0
2553	2	69	0,2	sleep0	2551	-21	fschecks_time	22:35:53	0
29293	2	67	0,2	sleep0	29294	-21	gcc	22:26:50	0
10369	2	66	0,2	sleep0	10372	-21	cut	23:36:06	0
15419	2	64	4,10	sleep0	15407	-21	hddtemp_smartct	22:06:39	0
30524	2	60	0,2	sleep0	30526	-21	cat	23:17:23	0
18295	2	57	3,44	sleep0	18366	-21	fschecks_time	22:10:50	0
6185	2	56	3,7	sleep0	6176	-21	python3	21:52:18	0
20302	2	56	3,44	sleep0	20306	-21	sh	21:25:38	0
1542	2	56	3,44	sleep0	1547	-21	chrt	22:34:30	0
5284	2	54	0,2	sleep0	5285	-21	seq	00:16:59	0
9059	2	53	4,42	sleep0	9070	-21	ntp_states	00:22:38	0
14510	2	52	3,8	sleep0	14523	-21	sleep	21:16:33	0
12813	2	52	0,1	sleep0	12814	-21	chrt	21:14:37	0
17677	2	51	3,8	sleep0	17669	-21	diskstats	00:35:51	0
9808	2	50	1,4	sleep0	0	-21	swapper	19:25:44	0
4135	2	50	2,7	sleep0	4143	-21	smartctl	21:00:40	0
32198	2	50	2,40	sleep0	32267	-21	irqrtprio	20:01:36	0
32220	90	49	13,16	cyclictest	0	-21	swapper	00:05:08	0
2972	2	48	3,37	sleep0	2968	-21	ntpq	20:06:00	0
32220	90	47	18,22	cyclictest	0	-21	swapper	00:28:31	0
32220	90	46	18,21	cyclictest	0	-21	swapper	21:59:56	0
32220	90	46	12,10	cyclictest	9294	-21	ls	23:35:04	0
19683	2	46	0,2	chrt	19672	-21	ssh	21:24:59	0
14374	2	46	3,35	sleep0	14402	-21	aten2.4-expect	20:25:25	0
32220	90	45	17,21	cyclictest	0	-21	swapper	23:43:05	0
26005	2	45	4,34	sleep0	25999	-21	ntpq	19:51:12	0
16374	2	45	2,37	sleep0	16376	-21	ssh	00:33:34	0
7971	2	43	0,3	chrt	7972	-21	runrttasks	21:06:14	0
32220	90	43	6,27	cyclictest	12349	-21	apt	19:30:13	0
32220	90	43	5,17	cyclictest	16736	-21	ntp_states	19:36:22	0
32220	90	43	16,20	cyclictest	0	-21	swapper	19:16:28	0
26938	2	43	0,4	chrt	26930	-21	aten2.4-expect	20:45:25	0
5756	2	42	0,3	sleep0	5757	-21	seq	23:29:43	0
32220	90	42	5,19	cyclictest	19760	-21	ntpq	19:41:06	0
17490	2	42	0,3	sleep0	17493	-21	aten2.4_rfpower	20:30:23	0
32220	90	40	16,17	cyclictest	28466	-21	latency_hist	23:15:05	0
32220	90	39	4,29	cyclictest	24598	-21	memory	20:40:49	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2024-02-27 - 12:39