OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, slot #1

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 100 highest latencies:

System rack4slot1s.osadl.org (updated Wed Jun 03, 2026 00:44:17)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
27943	2	108	0,3	sleep0	0	-21	swapper/0	22:57:54	0
17539	2	83	0,2	sleep0	17537	-21	perl	21:02:57	0
17539	2	83	0,2	sleep0	17537	-21	perl	21:02:57	0
17539	2	83	0,2	sleep0	17537	-21	perl	21:02:57	0
19879	2	73	0,3	sleep3	0	-21	swapper/3	00:02:55	3
19879	2	73	0,3	sleep3	0	-21	swapper/3	00:02:55	3
28716	2	69	0,10	sleep0	17	1	ktimers/0	21:33:04	0
28716	2	69	0,10	sleep0	17	1	ktimers/0	21:33:04	0
28716	2	69	0,10	sleep0	17	1	ktimers/0	21:33:04	0
4422	2	67	0,4	chrt	4423	-21	grep	20:27:56	0
4422	2	67	0,4	chrt	4423	-21	grep	20:27:56	0
27297	2	61	0,3	chrt	0	-21	swapper/2	21:28:00	2
27297	2	61	0,3	chrt	0	-21	swapper/2	21:28:00	2
27297	2	61	0,3	chrt	0	-21	swapper/2	21:28:00	2
12171	2	53	0,2	chrt	12168	-21	timerwakeupswit	22:13:05	1
12171	2	53	0,2	chrt	12168	-21	timerwakeupswit	22:13:05	1
12171	2	53	0,2	chrt	12168	-21	timerwakeupswit	22:13:05	1
15404	2	49	0,2	sleep1	0	-21	swapper/1	20:57:53	1
15404	2	49	0,2	sleep1	0	-21	swapper/1	20:57:53	1
6441	2	47	0,3	sleep0	0	-21	swapper/0	20:32:58	0
6441	2	47	0,3	sleep0	0	-21	swapper/0	20:32:58	0
30285	2	45	0,3	sleep3	0	-21	swapper/3	20:08:09	3
30285	2	45	0,3	sleep3	0	-21	swapper/3	20:08:09	3
11373	2	45	0,3	sleep0	0	-21	swapper/0	23:38:03	0
11373	2	45	0,3	sleep0	0	-21	swapper/0	23:38:03	0
11373	2	45	0,3	sleep0	0	-21	swapper/0	23:38:03	0
12600	99	43	1,17	cyclictest	19746	-21	cut	00:02:47	1
12600	99	43	1,17	cyclictest	19746	-21	cut	00:02:47	1
12600	99	43	1,17	cyclictest	19746	-21	cut	00:02:47	1
12600	99	42	15,4	cyclictest	10964	-21	latency_hist	22:12:49	1
12600	99	42	15,4	cyclictest	10964	-21	latency_hist	22:12:49	1
12600	99	42	15,4	cyclictest	10964	-21	latency_hist	22:12:49	1
30840	2	40	0,1	sleep0	0	-21	swapper/0	23:03:05	0
30840	2	40	0,1	sleep0	0	-21	swapper/0	23:03:05	0
30840	2	40	0,1	sleep0	0	-21	swapper/0	23:03:05	0
26124	2	39	0,2	sleep3	0	-21	swapper/3	00:18:03	3
26124	2	39	0,2	sleep3	0	-21	swapper/3	00:18:03	3
26124	2	39	0,2	sleep3	0	-21	swapper/3	00:18:03	3
19728	2	39	0,2	sleep1	19732	-21	ls	19:42:50	1
19728	2	39	0,2	sleep1	19732	-21	ls	19:42:50	1
19728	2	39	0,2	sleep1	19732	-21	ls	19:42:50	1
12600	99	39	17,3	cyclictest	18809	-21	cut	22:32:56	1
12600	99	39	17,3	cyclictest	18809	-21	cut	22:32:56	1
12593	99	39	28,5	cyclictest	21337	-21	latency_hist	19:47:42	0
12593	99	39	28,5	cyclictest	21337	-21	latency_hist	19:47:42	0
12600	99	38	17,2	cyclictest	0	-21	swapper/1	19:57:56	1
12600	99	38	17,2	cyclictest	0	-21	swapper/1	19:57:56	1
14033	2	37	0,3	sleep2	0	-21	swapper/2	22:18:05	2
14033	2	37	0,3	sleep2	0	-21	swapper/2	22:18:05	2
12600	99	36	29,4	cyclictest	0	-21	swapper/1	00:02:55	1
12600	99	36	29,4	cyclictest	0	-21	swapper/1	00:02:55	1
12600	99	35	27,6	cyclictest	17765	-21	cron	23:57:43	1
12593	99	35	29,4	cyclictest	572	-21	cups-browsed	20:43:04	0
12593	99	35	29,4	cyclictest	572	-21	cups-browsed	20:43:04	0
12593	99	34	26,6	cyclictest	17021	-21	latency_hist	19:32:44	0
12593	99	34	26,6	cyclictest	17021	-21	latency_hist	19:32:44	0
12593	99	34	26,6	cyclictest	17021	-21	latency_hist	19:32:44	0
12593	99	34	19,9	cyclictest	12591	-21	cyclictest	22:54:58	0
12593	99	33	26,5	cyclictest	18771	-21	fschecks_time	22:32:56	0
12593	99	33	26,5	cyclictest	18771	-21	fschecks_time	22:32:56	0
12593	99	33	26,5	cyclictest	18771	-21	fschecks_time	22:32:56	0
12593	99	33	2,27	cyclictest	19998	-21	df_inode	00:02:56	0
12593	99	33	2,27	cyclictest	19998	-21	df_inode	00:02:56	0
12602	99	32	2,23	cyclictest	19782	-21	chrt	00:02:49	2
12602	99	32	2,23	cyclictest	19782	-21	chrt	00:02:49	2
12602	99	32	2,23	cyclictest	19782	-21	chrt	00:02:49	2
12593	99	32	25,5	cyclictest	2782	-21	latency_hist	23:17:45	0
12593	99	32	25,5	cyclictest	2782	-21	latency_hist	23:17:45	0
12593	99	32	25,5	cyclictest	11344	-21	latency_hist	22:12:56	0
12603	99	31	1,20	cyclictest	19797	-21	taskset	00:02:50	3
12603	99	31	1,20	cyclictest	19797	-21	taskset	00:02:50	3
12603	99	31	1,20	cyclictest	19797	-21	taskset	00:02:50	3
12600	99	31	24,5	cyclictest	29960	-21	fschecks_count	23:02:55	1
12593	99	31	25,5	cyclictest	10218	-21	threads	22:08:06	0
12593	99	31	25,5	cyclictest	10218	-21	threads	22:08:06	0
12593	99	31	24,5	cyclictest	26175	-21	netstat	00:18:03	0
12593	99	31	24,5	cyclictest	26175	-21	netstat	00:18:03	0
12593	99	31	24,5	cyclictest	26175	-21	netstat	00:18:03	0
12593	99	31	23,6	cyclictest	2065	-21	latency_hist	20:22:43	0
12593	99	31	23,6	cyclictest	18281	-21	timerwakeupswit	19:33:01	0
12593	99	31	19,10	cyclictest	22763	-21	threads	00:08:10	0
12593	99	31	19,10	cyclictest	22763	-21	threads	00:08:10	0
12593	99	31	19,10	cyclictest	22763	-21	threads	00:08:10	0
12593	99	30	25,3	cyclictest	20558	-21	fschecks_count	22:37:55	0
12593	99	30	25,3	cyclictest	20558	-21	fschecks_count	22:37:55	0
12593	99	30	25,3	cyclictest	20558	-21	fschecks_count	22:37:55	0
12593	99	30	21,7	cyclictest	1440	-21	gltestperf	23:12:56	0
12593	99	30	15,9	cyclictest	12591	-21	cyclictest	23:59:26	0
12593	99	30	15,9	cyclictest	12591	-21	cyclictest	23:59:26	0
12593	99	30	15,9	cyclictest	12591	-21	cyclictest	23:59:26	0
12600	99	29	24,3	cyclictest	27685	-21	cron	22:57:42	1
12600	99	29	24,3	cyclictest	27685	-21	cron	22:57:42	1
12600	99	29	23,4	cyclictest	1346	-21	avahi-daemon	23:43:03	1
12600	99	29	23,4	cyclictest	1346	-21	avahi-daemon	23:43:03	1
12600	99	29	23,4	cyclictest	10790	-21	gltestperf	23:37:55	1
12600	99	29	23,4	cyclictest	10790	-21	gltestperf	23:37:55	1
12600	99	29	23,4	cyclictest	10790	-21	gltestperf	23:37:55	1
12600	99	29	20,7	cyclictest	23004	-21	needreboot	22:43:00	1
12600	99	29	20,7	cyclictest	23004	-21	needreboot	22:43:00	1
12593	99	29	23,4	cyclictest	28459	-21	unixbench_singl	20:03:06	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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