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 Mon Nov 24, 2025 00:44:34)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
8792	2	114	0,2	chrt	8791	-21	ls	21:55:59	0
31917	2	114	0,2	chrt	31910	-21	ps	23:36:00	0
14224	2	109	0,2	chrt	14225	-21	sleep	20:03:58	0
6757	2	108	0,2	chrt	6758	-21	sleep	20:51:46	0
18288	2	107	0,2	chrt	18287	-21	modprobe	00:10:00	0
928	2	106	0,2	chrt	929	-21	ld	21:41:34	0
18706	2	100	0,2	chrt	18707	-21	sshd	22:13:44	0
25050	2	98	0,1	sleep0	25053	-21	tail	22:25:36	0
29061	2	97	0,2	chrt	29062	-21	sleep	19:29:20	0
22483	2	91	0,2	sleep0	22486	-21	cut	19:15:43	0
31575	2	88	0,2	sleep0	31576	-21	ssh	00:32:34	0
19571	2	88	0,3	chrt	19499	-21	ntp_states	21:17:04	0
9770	2	82	0,2	sleep0	9769	-21	awk	19:55:26	0
1259	2	81	0,2	sleep0	1257	-21	ntp_offset	20:41:08	0
17801	2	80	9,17	sleep0	17809	-21	ntp_states	19:05:55	0
25002	2	78	0,2	sleep0	25000	-21	ntpq	21:26:38	0
20073	2	76	0,2	sleep0	20075	-21	tail	20:15:26	0
23920	2	75	0,2	sleep0	23922	-21	load	23:21:14	0
20491	2	74	0,1	sleep0	20489	-21	ntp_kernel_pll_	22:16:32	0
14656	2	71	0,2	sleep0	14657	-21	basename	23:05:31	0
2675	2	68	0,2	sleep0	2674	-21	ls	00:40:01	0
19145	90	65	40,7	cyclictest	869	-21	snmpd	23:55:41	0
19145	90	65	35,13	cyclictest	7167	-21	head	19:50:24	0
19145	90	64	39,7	cyclictest	15120	-21	sh	20:05:38	0
19145	90	64	35,21	cyclictest	16085	-21	irqrtprio	21:11:08	0
19145	90	64	34,22	cyclictest	5757	-21	/usr/sbin/munin	21:50:36	0
19145	90	63	35,11	cyclictest	29105	-21	seq	00:28:31	0
19145	90	63	34,21	cyclictest	29863	-21	/usr/sbin/munin	19:30:37	0
19145	90	63	34,20	cyclictest	11790	-21	apt-get	23:00:12	0
19145	90	62	41,13	cyclictest	2013	-21	/usr/sbin/munin	19:41:34	0
19145	90	62	34,20	cyclictest	25435	-21	ssh	00:22:04	0
19145	90	62	34,20	cyclictest	10537	-21	sendmail_mailqu	22:57:12	0
19145	90	62	34,10	cyclictest	869	-21	snmpd	23:41:32	0
19145	90	61	42,13	cyclictest	13152	-21	df	00:00:44	0
19145	90	61	42,12	cyclictest	12011	-21	/usr/sbin/munin	22:01:12	0
19145	90	61	38,14	cyclictest	10088	-21	cat	21:00:01	0
19145	90	61	35,18	cyclictest	27066	-21	tune2fs	21:30:52	0
19145	90	61	34,20	cyclictest	30195	-21	aten2.4_rfpower	20:35:25	0
19145	90	61	33,21	cyclictest	8483	-21	ssh	23:51:41	0
19145	90	61	33,11	cyclictest	22561	-21	ssh	00:16:50	0
19145	90	60	38,14	cyclictest	32051	-21	ssh	22:37:17	0
19145	90	60	38,13	cyclictest	18929	-21	python3	23:12:14	0
19145	90	60	33,19	cyclictest	6588	-21	ssh	22:50:41	0
19145	90	60	33,10	cyclictest	3546	-21	latency	20:45:46	0
19145	90	60	32,21	cyclictest	24281	-21	ssh	22:23:46	0
19145	90	59	41,12	cyclictest	4907	-21	fschecks_count	19:45:36	0
19145	90	59	41,12	cyclictest	25696	-21	runrttasks	23:25:19	0
19145	90	59	38,13	cyclictest	897	-21	sh	21:47:17	0
19145	90	59	38,13	cyclictest	28134	-21	sh	22:30:52	0
19145	90	59	38,13	cyclictest	21214	-21	chrt	19:13:20	0
19145	90	59	34,13	cyclictest	19422	-21	ssh	00:11:13	0
19145	90	59	33,19	cyclictest	28795	-21	ssh	23:30:44	0
19145	90	59	32,20	cyclictest	10863	-21	if_eth1	21:00:44	0
19145	90	58	39,13	cyclictest	17014	-21	apt-get	20:11:02	0
19145	90	58	37,14	cyclictest	893	-21	runrttasks	22:40:13	0
19145	90	58	37,14	cyclictest	5478	-21	seq	23:46:11	0
19145	90	58	37,14	cyclictest	4191	-21	sh	22:46:01	0
19145	90	58	37,14	cyclictest	28617	-21	chrt	20:31:05	0
19145	90	58	37,13	cyclictest	14065	-21	awk	21:06:22	0
19145	90	58	36,14	cyclictest	23130	-21	cut	20:20:44	0
19145	90	58	36,13	cyclictest	24348	-21	/usr/sbin/munin	19:20:42	0
19145	90	58	35,13	cyclictest	25006	-21	apt-get	20:25:13	0
19145	90	58	33,18	cyclictest	21014	-21	ssh	21:20:23	0
19145	90	58	32,19	cyclictest	13756	-21	ssh	22:05:14	0
19145	90	58	31,20	cyclictest	29397	-21	ssh	21:35:24	0
19145	90	58	30,21	cyclictest	20475	-21	ssh	23:15:43	0
19145	90	56	35,14	cyclictest	32095	-21	aten2.4_rfpower	19:35:24	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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