OSADL QA Farm on Real-time of Mainline Linux

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

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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 376 highest latencies:

System rack7slot2.osadl.org (updated Fri Nov 28, 2025 00:44:08)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2004691	99	109	102,5	cyclictest	19	1	rcuc/0	22:02:59	0
2004691	99	109	102,5	cyclictest	19	1	rcuc/0	22:02:59	0
2004693	99	96	89,5	cyclictest	2075128	-21	kworker/u4:12+events_unbound	22:03:00	1
2004693	99	96	89,5	cyclictest	2075128	-21	kworker/u4:12+events_unbound	22:02:59	1
2004693	99	79	73,4	cyclictest	2027917	-21	kworker/u4:18+events_unbound	21:48:03	1
2004691	99	78	69,7	cyclictest	2143075	-21	kworker/u4:8+events_unbound	23:48:20	0
2004691	99	75	65,7	cyclictest	2066839	-21	kworker/u4:0+events_unbound	21:52:58	0
2004693	99	74	66,6	cyclictest	2107711	-21	kworker/u4:5+events_unbound	22:48:14	1
2004691	99	72	63,7	cyclictest	2054451	-21	kworker/u4:2+events_unbound	21:42:56	0
2004691	99	72	63,7	cyclictest	2054451	-21	kworker/u4:2+events_unbound	21:42:56	0
2004693	99	69	61,6	cyclictest	2082861	-21	kworker/u4:7+events_unbound	22:09:59	1
2004691	99	69	60,6	cyclictest	2123370	-21	kworker/u4:13+events_unbound	22:58:10	0
2004691	99	68	61,5	cyclictest	2192428	-21	kworker/u4:2+events_unbound	00:33:34	0
2004691	99	67	59,5	cyclictest	2082861	-21	kworker/u4:7+events_unbound	22:08:09	0
2004691	99	63	58,3	cyclictest	2163134	-21	kworker/u4:6+events_unbound	00:08:29	0
2004691	99	63	54,7	cyclictest	2107713	-21	kworker/u4:6+events_unbound	22:38:07	0
2004691	99	63	54,7	cyclictest	2107713	-21	kworker/u4:6+events_unbound	22:38:06	0
2004691	99	62	30,17	cyclictest	0	-21	swapper/0	22:20:19	0
2004691	99	60	53,5	cyclictest	2147136	-21	kworker/u4:11+events_unbound	23:28:14	0
2004693	99	59	47,10	cyclictest	53	-21	kswapd0	23:50:21	1
2004691	99	59	49,8	cyclictest	2054985	-21	systemd	21:33:02	0
2004691	99	59	49,7	cyclictest	2135474	-21	kworker/u4:9+events_unbound	23:13:13	0
2004691	99	59	34,9	cyclictest	53	-21	kswapd0	23:20:11	0
2004693	99	58	53,3	cyclictest	2143075	-21	kworker/u4:8+events_unbound	23:43:25	1
2004691	99	58	53,3	cyclictest	2082859	-21	kworker/u4:2+events_unbound	23:08:16	0
2004691	99	58	53,3	cyclictest	2082859	-21	kworker/u4:2+events_unbound	23:08:15	0
2004693	99	57	48,7	cyclictest	2174107	-21	kworker/u4:10+events_unbound	00:28:35	1
2004693	99	56	49,5	cyclictest	2140090	-21	sh	23:18:17	1
2004693	99	56	47,7	cyclictest	379	-21	dbus-daemon	23:03:10	1
2004693	99	56	47,6	cyclictest	2141354	-21	dpkg	23:20:12	1
2004691	99	56	47,7	cyclictest	2030521	-21	systemd	20:47:57	0
2004693	99	55	46,7	cyclictest	2163134	-21	kworker/u4:6+events_unbound	00:18:29	1
2004693	99	54	44,8	cyclictest	314	-21	systemd-journal	00:23:28	1
2004693	99	54	37,13	cyclictest	0	-21	swapper/1	00:00:14	1
2004693	99	54	33,14	cyclictest	2045036	-21	ntpq	21:20:36	1
2004691	99	54	49,3	cyclictest	2075128	-21	kworker/u4:12+events_unbound	22:33:04	0
2004691	99	54	45,7	cyclictest	2192428	-21	kworker/u4:2+events_unbound	00:38:31	0
2004691	99	54	39,8	cyclictest	2060171	-21	kworker/u4:3	21:40:00	0
2004691	99	54	39,12	cyclictest	0	-21	swapper/0	00:15:16	0
2004693	99	53	43,6	cyclictest	0	-21	swapper/1	21:10:14	1
2004691	99	53	43,8	cyclictest	2064547	-21	acpi	21:45:12	0
2004691	99	53	32,18	cyclictest	0	-21	swapper/0	19:15:16	0
2004691	99	53	29,8	cyclictest	2098399	-21	unixbench-2d	22:25:40	0
2004693	99	52	44,6	cyclictest	2013677	-21	systemd	19:42:53	1
2004693	99	52	31,15	cyclictest	2118101	-21	ntpq	22:50:30	1
2004693	99	52	19,10	cyclictest	2059838	-21	ssh	21:39:26	1
2004691	99	52	45,5	cyclictest	2172771	-21	/usr/sbin/munin	00:00:20	0
2004691	99	52	44,6	cyclictest	2125787	-21	gltestperf	23:00:24	0
2004691	99	52	43,6	cyclictest	1982518	-21	kworker/u4:1+events_unbound	19:37:54	0
2004691	99	52	42,8	cyclictest	2021399	-21	systemd	20:12:54	0
2004691	99	52	42,7	cyclictest	2111814	-21	kworker/u4:10+events_unbound	22:53:08	0
2004691	99	52	39,8	cyclictest	2009829	-21	modprobe	19:30:00	0
2004693	99	51	44,5	cyclictest	2073735	-21	cat	21:55:38	1
2004693	99	51	42,6	cyclictest	2089092	-21	aten2__	22:15:15	1
2004693	99	51	42,6	cyclictest	0	-21	swapper/1	22:55:18	1
2004693	99	51	41,8	cyclictest	2052182	-21	latency_hist	21:30:01	1
2004693	99	51	41,7	cyclictest	2107713	-21	kworker/u4:6+events_unbound	22:38:13	1
2004693	99	51	41,7	cyclictest	2107713	-21	kworker/u4:6+events_unbound	22:38:12	1
2004693	99	51	41,7	cyclictest	2024082	-21	latency_hist	20:25:01	1
2004693	99	51	34,13	cyclictest	2097244	-21	ssh	22:25:14	1
2004691	99	51	44,5	cyclictest	2137903	-21	/usr/sbin/munin	23:15:23	0
2004691	99	51	43,6	cyclictest	2147136	-21	kworker/u4:11+events_unbound	23:38:24	0
2004691	99	51	42,7	cyclictest	2050920	-21	systemd	21:28:02	0
2004691	99	51	42,7	cyclictest	2019808	-21	cat	20:05:38	0
2004691	99	51	29,19	cyclictest	2022666	-21	kworker/u4:4-rpciod	21:10:16	0
2004693	99	50	42,5	cyclictest	2172214	-21	idleruntime-cro	00:00:00	1
2004693	99	50	41,7	cyclictest	2195238	-21	unixbench-2d	00:30:44	1
2004693	99	50	40,7	cyclictest	2053251	-21	/usr/sbin/munin	21:30:38	1
2004693	99	50	39,7	cyclictest	0	-21	swapper/1	23:10:29	1
2004693	99	50	32,13	cyclictest	2146166	-21	ntp_states	23:25:36	1
2004693	99	50	31,11	cyclictest	2161412	-21	grep	23:45:21	1
2004691	99	50	42,6	cyclictest	2082860	-21	kworker/u4:3+events_unbound	22:18:03	0
2004691	99	50	38,10	cyclictest	2084979	-21	sh	22:10:12	0
2004693	99	49	42,5	cyclictest	2149567	-21	cpu	23:30:16	1
2004693	99	49	40,6	cyclictest	2021170	-21	timerandwakeup	20:10:41	1
2004693	99	49	40,6	cyclictest	0	-21	swapper/1	00:35:20	1
2004693	99	49	39,8	cyclictest	2018740	-21	unixbench_multi	20:00:37	1
2004693	99	49	38,8	cyclictest	2006059	-21	latency_hist	19:15:02	1
2004691	99	49	43,4	cyclictest	0	-21	swapper/0	19:52:53	0
2004691	99	49	32,14	cyclictest	2183358	-21	latency_hist	00:15:01	0
2004691	99	49	0,23	cyclictest	2166208	-21	users	23:50:44	0
2004693	99	48	43,3	cyclictest	2163134	-21	kworker/u4:6+events_unbound	00:08:31	1
2004693	99	48	40,5	cyclictest	2109964	-21	/usr/sbin/munin	22:40:23	1
2004693	99	48	39,7	cyclictest	2102629	-21	who	22:30:41	1
2004693	99	48	37,8	cyclictest	2022440	-21	threads	20:15:38	1
2004693	99	48	29,13	cyclictest	2069332	-21	ssh	21:50:29	1
2004693	99	48	27,12	cyclictest	2154578	-21	sed	23:35:39	1
2004691	99	48	41,5	cyclictest	2073745	-21	tr	21:55:39	0
2004693	99	47	40,5	cyclictest	2007301	-21	latency_hist	19:20:00	1
2004693	99	47	32,8	cyclictest	2085623	-21	ssh	22:10:26	1
2004693	99	47	25,15	cyclictest	2017554	-21	modprobe	20:00:01	1
2004691	99	47	39,5	cyclictest	2004689	-21	cyclictest	21:20:24	0
2004691	99	47	38,7	cyclictest	0	-21	swapper/0	23:58:24	0
2004691	99	47	38,6	cyclictest	2030504	-21	kworker/u4:6+events_unbound	20:57:48	0
2004691	99	47	24,19	cyclictest	0	-21	swapper/0	20:35:13	0
2004693	99	46	39,5	cyclictest	2040675	-21	awk	21:15:23	1
2004693	99	46	37,7	cyclictest	2033589	-21	fschecks_count	21:00:24	1
2004693	99	46	37,7	cyclictest	2012318	-21	unixbench_singl	19:35:41	1
2004693	99	46	37,6	cyclictest	2035827	-21	latency_hist	21:10:02	1
2004693	99	46	36,8	cyclictest	2060592	-21	rm	21:40:16	1
2004693	99	46	36,8	cyclictest	2060592	-21	rm	21:40:16	1
2004693	99	46	26,15	cyclictest	2180789	-21	ssh	00:10:36	1
2004693	99	46	25,14	cyclictest	2129927	-21	ssh	23:05:27	1
2004693	99	46	25,14	cyclictest	2129927	-21	ssh	23:05:27	1
2004693	99	46	25,14	cyclictest	2093917	-21	ssh	22:20:30	1
2004691	99	46	39,5	cyclictest	2030815	-21	aten_r7power_po	20:50:19	0
2004691	99	46	38,5	cyclictest	2075128	-21	kworker/u4:12-rpciod	22:40:25	0
2004691	99	46	37,7	cyclictest	2025721	-21	fschecks_count	20:30:21	0
2004691	99	46	37,6	cyclictest	2150203	-21	ssh	23:30:33	0
2004691	99	46	36,7	cyclictest	2035828	-21	latency_hist	21:10:03	0
2004693	99	45	36,7	cyclictest	2008751	-21	grep	19:25:15	1
2004693	99	45	23,19	cyclictest	2030062	-21	ntpq	20:45:31	1
2004691	99	45	36,6	cyclictest	2023811	-21	timerwakeupswit	20:20:40	0
2004691	99	45	36,6	cyclictest	0	-21	swapper/0	19:45:35	0
2004691	99	45	35,8	cyclictest	2113895	-21	if_eth0	22:45:22	0
2004691	99	45	33,10	cyclictest	2011082	-21	systemd	19:32:36	0
2004691	99	45	32,11	cyclictest	0	-21	swapper/0	23:43:22	0
2004691	99	44	37,4	cyclictest	2187994	-21	ssh	00:20:37	0
2004693	99	43	34,7	cyclictest	2016103	-21	unixbench-2d	19:50:40	1
2004693	99	43	33,6	cyclictest	0	-21	swapper/1	20:30:27	1
2004693	99	43	27,12	cyclictest	2014578	-21	ps	19:45:34	1
2004693	99	43	25,14	cyclictest	0	-21	swapper/1	20:55:14	1
2004693	99	43	22,17	cyclictest	0	-21	swapper/1	20:50:15	1
2004691	99	43	36,5	cyclictest	2017580	-21	awk	20:00:00	0
2004691	99	43	32,9	cyclictest	2040242	-21	cpu	21:15:16	0
2004691	99	43	30,10	cyclictest	2022500	-21	timerwakeupswit	20:15:38	0
2004693	99	42	33,7	cyclictest	0	-21	swapper/1	20:35:21	1
2004691	99	42	35,5	cyclictest	2024462	-21	fschecks_count	20:25:20	0
2004691	99	42	33,7	cyclictest	2190778	-21	aten2__	00:25:17	0
2004693	99	41	34,5	cyclictest	2028498	-21	fschecks_time	20:40:21	1
2004693	99	41	31,8	cyclictest	2025147	-21	unixbench-2d	20:25:39	1
2004691	99	41	35,4	cyclictest	2028512	-21	gltestperf	20:40:20	0
2004691	99	41	34,5	cyclictest	2007475	-21	cut	19:20:20	0
2004691	99	41	33,5	cyclictest	2033596	-21	fschecks_time	21:00:24	0
2004691	99	41	32,6	cyclictest	1994624	-21	kworker/u4:11+events_unbound	19:12:35	0
2004693	99	40	24,13	cyclictest	0	-21	swapper/1	19:20:16	1
2004691	99	40	32,5	cyclictest	2012653	-21	aten_r7power_en	19:40:15	0
2004693	99	39	23,12	cyclictest	2019028	-21	apt-get	20:05:16	1
2004691	99	38	29,6	cyclictest	2007196	-21	kworker/u4:14+events_unbound	20:02:55	0
2004693	99	37	28,7	cyclictest	0	-21	swapper/1	19:30:15	1
2004693	99	36	17,13	cyclictest	2004795	-21	latency_hist	19:10:01	1
2004691	99	32	23,7	cyclictest	2004666	-21	munin-run	19:10:01	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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