OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, 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
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: ondemand
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rack5slot4s.osadl.org (updated Tue May 26, 2026 00:44:15)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2213391	2	430	0,3	sleep1	2213393	-21	kthreadcore	19:05:50	1
2215251	99	73	58,10	cyclictest	1704890	-21	systemd-journal	23:10:47	1
2215249	99	67	48,16	cyclictest	2375553	-21	ntpq	21:45:53	0
2215249	99	66	40,23	cyclictest	2232722	-21	diskstats	19:25:45	0
2215251	99	64	57,4	cyclictest	2366826	-21	kworker/u8:3+events_unbound	23:26:01	1
2215251	99	64	50,10	cyclictest	1704890	-21	systemd-journal	22:30:47	1
2215251	99	64	50,10	cyclictest	1704890	-21	systemd-journal	22:30:46	1
2215249	99	64	52,9	cyclictest	2251982	-21	apt-get	19:45:00	0
2215249	99	63	39,21	cyclictest	2476333	-21	diskstats	23:30:45	0
2215251	99	61	52,7	cyclictest	2297155	-21	kworker/u8:1+events_unbound	20:31:13	1
2215251	99	58	50,6	cyclictest	2262175	-21	base64	19:55:01	1
2215249	99	57	46,9	cyclictest	2454664	-21	ntpq	23:05:54	0
2215251	99	56	50,4	cyclictest	2366826	-21	kworker/u8:3+events_unbound	23:31:00	1
2215251	99	55	51,3	cyclictest	2158197	-21	kworker/u8:0+flush-8:0	19:45:45	1
2215251	99	54	47,5	cyclictest	2480548	-21	kworker/u8:2+events_unbound	00:20:57	1
2215249	99	53	46,5	cyclictest	2540141	-21	apt-get	00:31:36	0
2215251	99	52	42,8	cyclictest	2499735	-21	ntpq	23:50:57	1
2215251	99	52	42,7	cyclictest	1704890	-21	systemd-journal	22:20:47	1
2215249	99	52	35,15	cyclictest	2511112	-21	sshd	00:05:47	0
2215249	99	52	35,15	cyclictest	2511112	-21	sshd	00:05:47	0
2215249	99	52	27,22	cyclictest	2524366	-21	ntpq	00:15:52	0
2215251	99	51	38,9	cyclictest	1704890	-21	systemd-journal	20:55:47	1
2215251	99	50	46,3	cyclictest	2297155	-21	kworker/u8:1+flush-8:0	20:40:47	1
2215254	99	49	30,16	cyclictest	1704890	-21	systemd-journal	21:25:01	2
2215251	99	49	44,4	cyclictest	2366826	-21	kworker/u8:3+flush-8:0	23:16:01	1
2215251	99	49	40,6	cyclictest	1704890	-21	systemd-journal	21:00:47	1
2215249	99	49	30,16	cyclictest	2326769	-21	latency_hist	21:00:01	0
2401911	2	48	0,4	sleep1	0	-21	swapper/1	22:15:47	1
2215251	99	48	43,4	cyclictest	2232193	-21	kworker/u8:3+flush-8:0	20:45:45	1
2215251	99	47	37,8	cyclictest	2286336	-21	ntpq	20:15:53	1
2215249	99	47	23,9	cyclictest	2541230	-21	diskstats	00:35:45	0
2215251	99	46	40,5	cyclictest	2158197	-21	kworker/u8:0+events_unbound	21:50:49	1
2215251	99	46	37,6	cyclictest	2445719	-21	latency_hist	23:00:01	1
2215249	99	46	26,17	cyclictest	2272797	-21	fschecks_time	20:05:47	0
2215251	99	45	41,3	cyclictest	2183655	-21	kworker/u8:2+flush-8:0	20:06:00	1
2215251	99	45	39,4	cyclictest	2435863	-21	kworker/u8:0+events_unbound	22:50:58	1
2215249	99	45	36,7	cyclictest	2465688	-21	latency_hist	23:20:00	0
2215251	99	44	39,4	cyclictest	2480548	-21	kworker/u8:2+flush-8:0	23:56:00	1
2215251	99	44	38,4	cyclictest	2158197	-21	kworker/u8:0+events_unbound	21:05:45	1
2215251	99	44	34,7	cyclictest	2391313	-21	latency_hist	22:05:01	1
2215251	99	43	38,4	cyclictest	2232193	-21	kworker/u8:3+flush-8:0	20:35:46	1
2215251	99	43	37,4	cyclictest	2183655	-21	kworker/u8:2+events_unbound	20:00:44	1
2215251	99	43	36,5	cyclictest	2366826	-21	kworker/u8:3+flush-8:0	23:40:56	1
2215249	99	43	32,8	cyclictest	2281162	-21	ntpq	20:10:54	0
2215249	99	43	25,5	cyclictest	2470239	-21	unixbench_multi	23:21:02	0
2215249	99	43	22,6	cyclictest	2471436	-21	fschecks_count	23:25:46	0
2215251	99	42	36,5	cyclictest	2158197	-21	kworker/u8:0+flush-8:0	19:15:55	1
2215251	99	42	32,8	cyclictest	2251986	-21	latency_hist	19:45:01	1
2215249	99	42	23,2	cyclictest	2220155	-21	apt-key	19:15:00	0
2215251	99	41	34,5	cyclictest	2509623	-21	ntpq	00:00:56	1
2215249	99	40	31,7	cyclictest	2331715	-21	latency_hist	21:05:00	0
2215251	99	39	33,4	cyclictest	2391334	-21	kworker/u8:1+events_unbound	22:35:55	1
2215251	99	39	31,5	cyclictest	2158197	-21	kworker/u8:0+flush-8:0	19:26:00	1
2215254	99	38	29,7	cyclictest	2460621	-21	gpgv	23:15:01	2
2215254	99	38	24,12	cyclictest	2386689	-21	aten2_r5power_c	22:00:45	2
2215254	99	38	17,8	cyclictest	2540513	-21	base64	00:35:01	2
2215251	99	38	34,3	cyclictest	2158197	-21	kworker/u8:0+flush-8:0	19:36:01	1
2215251	99	38	32,4	cyclictest	2183655	-21	kworker/u8:2+flush-8:0	20:25:50	1
2215251	99	38	30,6	cyclictest	2220132	-21	latency_hist	19:15:01	1
2215249	99	38	26,9	cyclictest	2340940	-21	ntpq	21:10:55	0
2215249	99	38	26,9	cyclictest	2340940	-21	ntpq	21:10:54	0
2215251	99	37	33,3	cyclictest	2366826	-21	kworker/u8:3+events_unbound	23:21:00	1
2215251	99	37	32,4	cyclictest	2158197	-21	kworker/u8:0+events_unbound	21:45:56	1
2215251	99	37	32,3	cyclictest	2391334	-21	kworker/u8:1+flush-8:0	23:35:50	1
2215251	99	37	29,6	cyclictest	2183655	-21	kworker/u8:2+flush-8:0	19:20:48	1
2215249	99	37	26,8	cyclictest	2336651	-21	latency_hist	21:10:01	0
2215249	99	37	26,8	cyclictest	2311200	-21	ntpq	20:40:59	0
2215249	99	37	19,3	cyclictest	0	-21	swapper/0	19:45:49	0
2215254	99	36	24,10	cyclictest	2529900	-21	unixbench_singl	00:21:02	2
2215254	99	36	16,8	cyclictest	2252242	-21	cat	19:45:01	2
2215251	99	36	32,3	cyclictest	2183655	-21	kworker/u8:2+events_unbound	19:30:52	1
2215251	99	36	32,3	cyclictest	2183655	-21	kworker/u8:2+events_unbound	19:30:51	1
2215251	99	36	32,3	cyclictest	2158197	-21	kworker/u8:0+events_unbound	21:55:44	1
2215251	99	36	30,4	cyclictest	2505539	-21	kworker/u8:3+events_unbound	00:10:58	1
2215251	99	36	25,7	cyclictest	1704890	-21	systemd-journal	21:40:47	1
2215249	99	36	27,6	cyclictest	2491222	-21	grep	23:45:44	0
2215249	99	36	23,11	cyclictest	2530636	-21	apt-key	00:25:02	0
2215249	99	36	1,33	cyclictest	2440800	-21	kworker/0:1+events	23:35:57	0
2215249	99	36	1,32	cyclictest	1	-21	systemd	22:35:00	0
2215249	99	36	1,32	cyclictest	1	-21	systemd	22:34:59	0
2215254	99	35	22,2	cyclictest	2506135	-21	fschecks_time	00:00:47	2
2215254	99	35	21,2	cyclictest	2302661	-21	fschecks_count	20:35:45	2
2215251	99	35	31,3	cyclictest	2232193	-21	kworker/u8:3+events_unbound	19:56:01	1
2215251	99	34	29,3	cyclictest	2366222	-21	unixbench_singl	21:36:01	1
2215251	99	34	27,5	cyclictest	2158197	-21	kworker/u8:0+flush-8:0	21:30:55	1
2215251	99	33	28,3	cyclictest	2158197	-21	kworker/u8:0+events_unbound	22:10:55	1
2215251	99	33	26,5	cyclictest	2435863	-21	kworker/u8:0+events_unbound	23:00:47	1
2215251	99	33	26,5	cyclictest	2415723	-21	kworker/u8:2+flush-8:0	22:40:55	1
2215249	99	33	28,3	cyclictest	2397108	-21	irqcore	22:10:49	0
2215249	99	33	26,5	cyclictest	1704890	-21	systemd-journal	21:40:01	0
2215249	99	33	23,8	cyclictest	2449745	-21	ntpq	23:00:53	0
2215254	99	32	26,4	cyclictest	2311581	-21	unixbench_multi	20:41:02	2
2215254	99	32	10,2	cyclictest	2272404	2	cat	20:05:00	2
2215251	99	32	27,4	cyclictest	2480548	-21	kworker/u8:2+flush-8:0	23:45:57	1
2215251	99	32	27,3	cyclictest	2535439	-21	kworker/u8:1+events_unbound	00:35:43	1
2215251	99	32	27,3	cyclictest	2232193	-21	kworker/u8:3+events_unbound	21:11:02	1
2215251	99	32	27,3	cyclictest	2232193	-21	kworker/u8:3+events_unbound	21:11:02	1
2215249	99	32	26,5	cyclictest	2232193	-21	kworker/u8:3+flush-8:0	20:35:59	0
2259173	2	31	0,14	sleep2	0	-21	swapper/2	19:50:50	2
2215251	99	31	27,3	cyclictest	2435863	-21	kworker/u8:0+events_unbound	23:05:49	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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