OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #2, slot #7

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.
Unexpectedly long latencies may be caused by SMIs
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 792 highest latencies:

System rack2slot7s.osadl.org (updated Fri Mar 06, 2026 07:55:02)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1908453	99	85	54,12	cyclictest	2733447	-21	sh	06:10:47	0
1908455	99	62	51,8	cyclictest	2147871	-21	sh	05:40:35	2
1908455	99	61	47,9	cyclictest	2732642	-21	sh	06:10:44	2
1908454	99	59	49,7	cyclictest	2731217	-21	multi.sh	06:10:40	1
1908453	99	56	47,5	cyclictest	2147409	-21	grep	05:40:33	0
1908454	99	55	45,7	cyclictest	2175489	-21	sh	05:41:46	1
1908454	99	52	43,4	cyclictest	0	-21	swapper/1	06:05:32	1
1908454	99	52	43,4	cyclictest	0	-21	swapper/1	06:05:32	1
1908454	99	51	45,3	cyclictest	0	-21	swapper/1	06:40:01	1
1908453	99	50	34,13	cyclictest	2687583	-21	wc	06:08:55	0
1908453	99	50	34,13	cyclictest	2687583	-21	wc	06:08:55	0
1908455	99	49	40,5	cyclictest	2693778	-21	sh	06:09:09	2
1908455	99	49	40,5	cyclictest	2693778	-21	sh	06:09:09	2
1908453	99	49	43,3	cyclictest	0	-21	swapper/0	05:50:26	0
1908454	99	48	39,6	cyclictest	3606335	-21	systemd-logind	05:25:01	1
1908454	99	48	39,6	cyclictest	3606335	-21	systemd-logind	05:25:01	1
1908454	99	47	37,6	cyclictest	2341176	-21	spawn	06:03:17	1
1908454	99	47	37,6	cyclictest	2341176	-21	spawn	06:03:17	1
1908454	99	47	0,7	cyclictest	1914969	-21	fstime	05:25:28	1
1908454	99	46	40,3	cyclictest	0	-21	swapper/1	06:20:00	1
1908455	99	45	31,10	cyclictest	1911426	-21	Run	06:01:55	2
1908455	99	45	31,10	cyclictest	1911426	-21	Run	06:01:55	2
1908455	99	45	1,40	cyclictest	1913414	-21	execl	05:20:31	2
1908455	99	45	1,40	cyclictest	1913414	-21	execl	05:20:31	2
1908455	99	43	35,5	cyclictest	1911426	-21	unixbench	05:15:01	2
1908455	99	43	35,5	cyclictest	1911426	-21	unixbench	05:15:01	2
1908454	99	42	3,9	cyclictest	28	-21	ksoftirqd/1	05:10:30	1
1908454	99	42	3,9	cyclictest	28	-21	ksoftirqd/1	05:10:30	1
1908454	99	42	34,5	cyclictest	1909949	-21	systemd-run	05:10:00	1
1908453	99	41	33,5	cyclictest	2105767	-21	spawn	05:35:01	0
1908453	99	41	33,5	cyclictest	2105767	-21	spawn	05:35:01	0
1908453	99	41	1,37	cyclictest	1913414	-21	execl	05:20:37	0
1908453	99	41	1,37	cyclictest	1913414	-21	execl	05:20:37	0
1908455	99	39	27,7	cyclictest	1917136	-21	pipe	05:30:23	2
1908455	99	39	27,7	cyclictest	1917136	-21	pipe	05:30:23	2
1908454	99	39	31,5	cyclictest	2218905	-21	execl	05:50:16	1
1908453	99	39	23,9	cyclictest	124	50	irq/32-eth0	06:30:25	0
1908455	99	38	32,3	cyclictest	0	-21	swapper/2	05:50:21	2
1908455	99	38	30,5	cyclictest	2218464	-21	Run	05:46:08	2
1908455	99	38	14,9	cyclictest	2114316	-21	sh	05:37:49	2
1908454	99	37	29,5	cyclictest	2218651	-21	execl	05:50:03	1
1908454	99	37	26,6	cyclictest	27	1	ktimers/1	06:25:27	1
1908453	99	37	30,5	cyclictest	2503619	-21	spawn	06:03:59	0
1908453	99	37	30,5	cyclictest	2503619	-21	spawn	06:03:59	0
1908455	99	36	0,3	cyclictest	17	1	rcu_preempt	06:30:30	2
1908454	99	35	4,27	cyclictest	564	-21	dbus-daemon	05:57:02	1
1908454	99	35	27,5	cyclictest	0	-21	swapper/1	05:40:00	1
1908453	99	35	18,10	cyclictest	2218650	-21	execl	05:50:02	0
1908455	99	34	28,3	cyclictest	0	-21	swapper/2	06:40:01	2
1908455	99	34	26,5	cyclictest	2791317	-21	systemd-run	06:25:01	2
1908455	99	34	26,5	cyclictest	1912590	-21	mailstats	05:15:34	2
1908455	99	34	26,5	cyclictest	1912590	-21	mailstats	05:15:34	2
1908455	99	34	26,5	cyclictest	1909955	-21	systemd-run	05:10:01	2
1908454	99	34	25,5	cyclictest	0	-21	swapper/1	05:34:36	1
1908454	99	34	25,5	cyclictest	0	-21	swapper/1	05:34:36	1
1908453	99	34	27,4	cyclictest	2139486	-21	sh	05:39:59	0
1908455	99	33	2,25	cyclictest	2220262	-21	Run	05:55:11	2
1908454	99	33	25,5	cyclictest	2794281	-21	cron	06:35:01	1
1908453	99	33	24,4	cyclictest	0	-21	swapper/0	06:20:31	0
1908453	99	33	1,27	cyclictest	1914969	-21	fstime	05:25:25	0
1908454	99	32	5,18	cyclictest	1165	-21	mta-sts-daemon	05:15:31	1
1908454	99	32	5,18	cyclictest	1165	-21	mta-sts-daemon	05:15:31	1
1908453	99	32	27,2	cyclictest	0	-21	swapper/0	05:20:00	0
1908453	99	32	27,2	cyclictest	0	-21	swapper/0	05:20:00	0
1908453	99	31	3,22	cyclictest	763	-21	snmpd	06:25:26	0
1908455	99	30	0,4	cyclictest	17	1	rcu_preempt	06:15:32	2
1908454	99	30	20,7	cyclictest	27	1	ktimers/1	06:20:28	1
1908455	99	29	22,3	cyclictest	0	-21	swapper/2	05:25:30	2
1908453	99	29	23,4	cyclictest	1910229	-21	aten_r2power_en	05:10:18	0
1908453	99	29	23,4	cyclictest	1910229	-21	aten_r2power_en	05:10:18	0
1908453	99	29	15,8	cyclictest	124	50	irq/32-eth0	05:57:03	0
1908453	99	28	20,5	cyclictest	1898115	-21	kworker/u8:6+xprtiod	05:05:37	0
1908455	99	26	21,3	cyclictest	1168	-21	mta-sts-daemon	05:05:01	2
1908455	99	26	21,3	cyclictest	1168	-21	mta-sts-daemon	05:05:01	2
1908453	99	26	20,4	cyclictest	2794798	-21	fschecks_count	06:35:20	0
1908455	99	24	18,3	cyclictest	0	-21	swapper/2	06:30:01	2
1908453	99	24	20,2	cyclictest	0	-21	swapper/0	06:20:00	0
1908454	99	22	12,3	cyclictest	17	1	rcu_preempt	05:05:01	1
1908454	99	22	12,3	cyclictest	17	1	rcu_preempt	05:05:01	1
1908453	99	19	12,4	cyclictest	1905723	-21	kworker/u8:11+xprtiod	05:05:01	0
1908453	99	19	12,4	cyclictest	1905723	-21	kworker/u8:11+xprtiod	05:05:01	0
1908456	99	18	3,8	cyclictest	0	-21	swapper/3	06:10:35	3
1908456	99	18	3,8	cyclictest	0	-21	swapper/3	06:00:31	3
1908456	99	18	3,8	cyclictest	0	-21	swapper/3	06:00:31	3
1908456	99	18	2,9	cyclictest	0	-21	swapper/3	06:05:06	3
1908456	99	18	2,9	cyclictest	0	-21	swapper/3	06:05:06	3
1908456	99	17	3,8	cyclictest	0	-21	swapper/3	05:50:27	3
1908456	99	16	4,4	cyclictest	0	-21	swapper/3	06:15:34	3
1908456	99	16	3,7	cyclictest	0	-21	swapper/3	05:20:33	3
1908456	99	16	3,7	cyclictest	0	-21	swapper/3	05:20:33	3
1908456	99	16	2,6	cyclictest	0	-21	swapper/3	05:55:11	3
1908456	99	16	1,8	cyclictest	0	-21	swapper/3	05:40:26	3
1908456	99	15	4,4	cyclictest	0	-21	swapper/3	05:25:28	3
1908456	99	15	3,6	cyclictest	0	-21	swapper/3	05:45:26	3
1908456	99	15	1,7	cyclictest	0	-21	swapper/3	05:30:28	3
1908456	99	15	1,7	cyclictest	0	-21	swapper/3	05:30:28	3
1908456	99	15	1,6	cyclictest	0	-21	swapper/3	05:10:30	3
1908456	99	15	1,6	cyclictest	0	-21	swapper/3	05:10:30	3
1908456	99	14	3,7	cyclictest	0	-21	swapper/3	06:30:25	3
1908456	99	14	1,6	cyclictest	0	-21	swapper/3	05:35:29	3
1908456	99	14	1,6	cyclictest	0	-21	swapper/3	05:05:24	3
1908456	99	13	2,6	cyclictest	0	-21	swapper/3	05:15:34	3
1908456	99	13	2,6	cyclictest	0	-21	swapper/3	05:15:34	3
1908456	99	11	3,5	cyclictest	0	-21	swapper/3	06:20:31	3
1908456	99	10	1,6	cyclictest	0	-21	swapper/3	06:35:31	3
1908456	99	10	1,6	cyclictest	0	-21	swapper/3	06:25:20	3
1908456	99	7	1,3	cyclictest	0	-21	swapper/3	05:05:00	3
1908456	99	7	1,3	cyclictest	0	-21	swapper/3	05:05:00	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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