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 all highest latencies:

System rackfslot4s.osadl.org (updated Sun Jul 19, 2026 00:44:34)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1475	2	125	0,2	chrt	1476	-21	aten2.4_rfpower	20:56:14	0
10007	2	116	0,2	chrt	10009	-21	irqrtprio	22:46:06	0
29987	2	115	0,3	chrt	29985	-21	ssh	21:39:15	0
22555	2	115	0,2	chrt	22556	-21	if_eth1	19:46:34	0
28256	2	114	0,2	chrt	28254	-21	ssh	22:25:23	0
21769	2	113	0,1	sleep0	21770	-21	chrt	23:04:10	0
28798	2	111	0,1	sleep0	28799	-21	latency_hist	23:15:02	0
7167	2	110	0,1	sleep0	7168	-21	seq	21:52:57	0
10458	2	110	0,1	sleep0	10459	-21	seq	21:57:53	0
11333	2	108	0,2	sleep0	11336	-21	irqrtprio	21:11:12	0
11060	2	107	0,2	chrt	11061	-21	sleep	19:27:46	0
2068	2	106	0,2	sleep0	2069	-21	rm	00:11:25	0
9638	2	105	0,2	chrt	9637	-21	awk	00:23:00	0
31359	2	104	0,2	chrt	31360	-21	sleep	20:00:11	0
26534	2	104	0,2	chrt	26535	-21	ntp_states	22:22:10	0
26216	2	104	0,3	chrt	26217	-21	sleep	21:33:17	0
23645	2	102	0,2	sleep0	23646	-21	seq	23:06:30	0
24360	2	101	0,2	sleep0	24361	-21	seq	22:19:21	0
27545	2	99	0,2	sleep0	27549	-21	fschecks_time	20:45:35	0
14946	2	99	0,2	sleep0	14947	-21	seq	22:53:48	0
18348	2	98	0,2	sleep0	18349	-21	chrt	21:21:17	0
9527	2	95	0,1	sleep0	9526	-21	seq	23:34:27	0
23841	2	94	0,1	sleep0	23840	-21	tune2fs	23:55:52	0
16279	2	91	0,2	sleep0	16278	-21	grep	22:55:54	0
30568	2	89	0,2	sleep0	30569	-21	ssh	21:40:16	0
17747	2	89	0,1	sleep0	17744	-21	ssh	00:35:14	0
31759	2	85	0,2	sleep0	31757	-21	seq	00:07:15	0
30432	2	82	0,2	sleep0	30433	-21	aten2.4-expect	20:50:26	0
19363	2	82	0,1	sleep0	19365	-21	missed_timers	22:11:15	0
28975	2	74	12,48	sleep0	28934	-21	apt-get	19:05:18	0
19062	2	72	0,1	sleep0	19063	-21	seq	23:48:23	0
11978	2	72	0,1	sleep0	11980	-21	grep	20:20:35	0
433	2	71	0,1	sleep0	434	-21	basename	23:20:54	0
25830	2	68	0,2	sleep0	25831	-21	cat	19:51:33	0
3535	2	67	0,2	sleep0	3536	-21	missed_timers	22:36:15	0
2048	2	67	0,1	sleep0	2049	-21	chrt	20:05:16	0
31939	90	64	34,22	cyclictest	11522	-21	ntp_states	23:36:56	0
11385	2	64	0,1	sleep0	11386	-21	chrt	00:25:45	0
31939	90	63	32,22	cyclictest	1247	-21	apt-get	21:46:15	0
31939	90	62	28,14	cyclictest	335	-21	ntpq	22:31:30	0
31939	90	61	28,13	cyclictest	12406	-21	df_inode	19:30:31	0
31939	90	61	27,15	cyclictest	6590	-21	cut	22:41:04	0
21621	2	61	0,1	sleep0	21623	-21	latency	21:26:14	0
15994	2	61	0,1	sleep0	15996	-21	irqrtprio	19:35:43	0
31939	90	60	28,23	cyclictest	5531	-21	sh	00:16:40	0
31939	90	60	28,23	cyclictest	15720	-21	ntpq	00:31:45	0
31939	90	60	27,24	cyclictest	20626	-21	sleep	23:51:02	0
31939	90	60	27,24	cyclictest	14681	-21	sshd	23:41:35	0
31939	90	59	32,19	cyclictest	19550	-21	chrt	19:41:13	0
31939	90	59	31,17	cyclictest	32278	-21	telnet	19:10:25	0
31939	90	59	28,23	cyclictest	3965	-21	kworker/u2:1	21:16:59	0
31939	90	59	26,14	cyclictest	15461	-21	tune2fs	22:05:52	0
31939	90	58	30,12	cyclictest	4550	-21	ntpq	23:26:18	0
31939	90	58	27,22	cyclictest	30162	-21	ntpq	23:16:18	0
31939	90	58	26,22	cyclictest	6184	-21	df	19:20:28	0
31939	90	58	26,14	cyclictest	29847	-21	sleep	19:57:09	0
31939	90	57	26,22	cyclictest	4225	-21	chrt	19:16:26	0
31939	90	57	25,24	cyclictest	25015	-21	ntpq	20:40:53	0
31939	90	57	24,14	cyclictest	12059	-21	ssh	22:00:50	0
31939	90	57	23,14	cyclictest	27950	-21	ntpq	00:01:34	0
31939	90	56	33,15	cyclictest	6510	-21	ps	20:11:26	0
31939	90	56	33,13	cyclictest	18106	-21	df_inode	20:30:30	0
31939	90	56	31,15	cyclictest	7286	-21	apt-get	21:05:19	0
31939	90	55	33,14	cyclictest	14666	-21	apt-get	20:25:13	0
31939	90	55	30,13	cyclictest	20869	-21	apt-get	20:35:17	0
31939	90	55	23,23	cyclictest	5305	-21	ntpq	21:01:00	0
31939	90	53	31,13	cyclictest	8394	-21	apt-get	20:15:26	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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