OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of system in rack #e, slot #6

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 100 highest latencies:

System rackeslot6.osadl.org (updated Tue Aug 25, 2026 00:44:56)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
844710	99	149	135,9	cyclictest	1213033	-21	systemd-journal	22:50:02	1
844710	99	144	134,7	cyclictest	897889	-21	latency_hist	21:55:01	1
844706	99	139	131,6	cyclictest	920676	-21	kworker/u8:0+events_unbound	23:05:00	0
844706	99	139	129,7	cyclictest	864217	-21	latency_hist	20:10:01	0
844706	99	135	128,5	cyclictest	898038	-21	kworker/u8:2+events_unbound	22:29:59	0
844710	99	132	123,7	cyclictest	861077	-21	kworker/u8:0+flush-179:0	20:20:01	1
844706	99	132	122,8	cyclictest	844567	-21	latency_hist	19:10:02	0
844706	99	132	122,7	cyclictest	1213033	-21	systemd-journal	19:15:02	0
844706	99	132	122,7	cyclictest	1213033	-21	systemd-journal	19:15:01	0
844710	99	131	121,7	cyclictest	899766	-21	latency_hist	22:00:02	1
844710	99	131	121,7	cyclictest	899766	-21	latency_hist	22:00:02	1
844706	99	125	114,6	cyclictest	920676	-21	kworker/u8:0+events_unbound	23:10:02	0
844706	99	124	114,6	cyclictest	909330	-21	kworker/u8:0+events_unbound	22:40:01	0
844706	99	121	110,8	cyclictest	843107	-21	kworker/u8:1+events_unbound	19:30:02	0
844706	99	120	105,6	cyclictest	923913	-21	kworker/u8:3+flush-179:0	23:20:24	0
844706	99	120	0,118	cyclictest	1	-21	systemd	23:00:00	0
844706	99	120	0,118	cyclictest	1	-21	systemd	21:40:00	0
844710	99	118	107,7	cyclictest	854683	-21	latency_hist	19:40:01	1
844710	99	116	104,4	cyclictest	934238	-21	kworker/u8:0+events_unbound	00:00:01	1
844710	99	115	103,9	cyclictest	944663	-21	latency_hist	00:30:01	1
844706	99	115	108,5	cyclictest	947555	-21	kworker/u8:0+flush-179:0	00:40:00	0
844706	99	113	101,8	cyclictest	873747	-21	kworker/u8:0+events_unbound	21:05:20	0
844706	99	110	99,7	cyclictest	898038	-21	kworker/u8:2+events_unbound	22:50:20	0
844706	99	109	100,6	cyclictest	847827	-21	kworker/u8:3+flush-179:0	19:20:15	0
844706	99	108	97,7	cyclictest	923852	-21	kworker/u8:2+events_unbound	23:25:19	0
844706	99	108	103,4	cyclictest	935907	-21	kworker/u8:2+events_unbound	00:04:00	0
844706	99	107	98,6	cyclictest	923913	-21	kworker/u8:3+events_unbound	23:35:04	0
844706	99	107	98,6	cyclictest	923913	-21	kworker/u8:3+events_unbound	23:35:03	0
844706	99	107	93,11	cyclictest	851236	-21	apt-get	19:30:00	0
844706	99	106	99,5	cyclictest	873747	-21	kworker/u8:0+events_unbound	21:20:01	0
844710	99	105	91,11	cyclictest	1213033	-21	systemd-journal	21:25:00	1
844706	99	105	95,8	cyclictest	854938	-21	apt-get	19:40:13	0
844706	99	105	92,5	cyclictest	923913	-21	kworker/u8:3+events_unbound	23:57:15	0
844706	99	104	98,4	cyclictest	942860	-21	kworker/u8:1+flush-179:0	00:30:20	0
844706	99	104	97,4	cyclictest	867369	-21	kworker/u8:1+events_unbound	20:45:20	0
844706	99	103	93,8	cyclictest	937750	-21	/usr/sbin/munin	00:05:26	0
844706	99	103	93,8	cyclictest	873747	-21	kworker/u8:0+flush-179:0	20:50:26	0
844710	99	101	93,5	cyclictest	924833	-21	apt-get	23:15:20	1
844710	99	100	93,5	cyclictest	843107	-21	kworker/u8:1+flush-179:0	19:25:17	1
844706	99	100	95,4	cyclictest	884887	-21	kworker/u8:3+flush-179:0	21:55:25	0
844706	99	100	95,4	cyclictest	884887	-21	kworker/u8:3+flush-179:0	21:55:24	0
844706	99	99	95,3	cyclictest	843107	-21	kworker/u8:1+flush-179:0	19:35:24	0
844706	99	99	92,4	cyclictest	942860	-21	kworker/u8:1+flush-179:0	00:25:25	0
844706	99	98	93,4	cyclictest	922267	-21	kworker/u8:1+flush-179:0	23:15:25	0
844706	99	98	89,6	cyclictest	881711	-21	kworker/u8:1+events_unbound	21:10:18	0
844706	99	98	89,6	cyclictest	881711	-21	kworker/u8:1+events_unbound	21:10:17	0
844706	99	97	83,7	cyclictest	884887	-21	kworker/u8:3+events_unbound	21:20:19	0
844706	99	96	90,4	cyclictest	873747	-21	kworker/u8:0+events_unbound	21:25:10	0
844706	99	96	87,7	cyclictest	923913	-21	kworker/u8:3+flush-179:0	00:20:16	0
844706	99	96	87,6	cyclictest	909330	-21	kworker/u8:0+flush-179:0	22:40:15	0
844706	99	96	86,7	cyclictest	873767	-21	latency_hist	20:40:01	0
844706	99	96	85,8	cyclictest	884887	-21	kworker/u8:3+events_unbound	22:00:16	0
844710	99	95	86,7	cyclictest	930806	-21	apt-get	23:35:23	1
844710	99	95	86,7	cyclictest	930806	-21	apt-get	23:35:22	1
844710	99	95	86,7	cyclictest	918810	-21	kworker/u8:3+events_unbound	23:00:00	1
844706	99	95	89,4	cyclictest	873747	-21	kworker/u8:0+events_unbound	20:55:23	0
844710	99	94	84,8	cyclictest	1213033	-21	systemd-journal	00:15:00	1
844706	99	94	81,10	cyclictest	1213033	-21	systemd-journal	23:35:01	0
844710	99	93	84,6	cyclictest	857831	-21	kworker/u8:3+flush-179:0	19:55:00	1
844710	99	93	79,12	cyclictest	939111	-21	apt-get	00:10:00	1
844710	99	92	81,9	cyclictest	894977	-21	apt-get	21:45:15	1
844706	99	92	85,4	cyclictest	894755	-21	kworker/u8:1+events_unbound	22:15:15	0
844706	99	92	80,9	cyclictest	894755	-21	kworker/u8:1+flush-179:0	21:50:23	0
844710	99	90	74,14	cyclictest	884887	-21	kworker/u8:3+events_unbound	21:39:59	1
844706	99	90	86,3	cyclictest	867369	-21	kworker/u8:1+events_unbound	20:40:24	0
844706	99	90	85,4	cyclictest	898038	-21	kworker/u8:2+flush-179:0	22:30:20	0
844706	99	90	83,5	cyclictest	912456	-21	kworker/u8:1+flush-179:0	22:45:12	0
844706	99	89	84,4	cyclictest	923913	-21	kworker/u8:3+events_unbound	23:40:15	0
844706	99	89	80,4	cyclictest	888828	-21	kworker/u8:1+events_unbound	21:30:26	0
844710	99	88	81,5	cyclictest	909552	-21	apt-get	22:30:12	1
844710	99	87	81,4	cyclictest	906380	-21	apt-get	22:20:12	1
844710	99	87	77,7	cyclictest	867952	-21	journal-offline	20:20:15	1
844710	99	87	77,7	cyclictest	867952	-21	journal-offline	20:20:14	1
844710	99	87	76,8	cyclictest	898038	-21	kworker/u8:2+events_unbound	22:10:00	1
844710	99	87	73,12	cyclictest	893091	-21	kworker/u8:0+flush-179:0	21:45:00	1
844710	99	87	70,13	cyclictest	942816	-21	apt-get	00:25:01	1
844710	99	86	77,7	cyclictest	1213033	-21	systemd-journal	21:08:09	1
844710	99	86	62,22	cyclictest	1213033	-21	systemd-journal	22:19:56	1
844706	99	85	79,4	cyclictest	867369	-21	kworker/u8:1+flush-179:0	20:25:21	0
844706	99	85	74,4	cyclictest	898038	-21	kworker/u8:2+events_unbound	22:10:14	0
844706	99	84	78,4	cyclictest	861077	-21	kworker/u8:0+flush-179:0	20:00:20	0
844710	99	83	69,11	cyclictest	1213033	-21	systemd-journal	00:20:01	1
844706	99	83	73,7	cyclictest	865802	-21	latency_hist	20:15:01	0
844710	99	82	72,8	cyclictest	872427	-21	apt-get	20:35:12	1
844710	99	82	67,11	cyclictest	946260	-21	apt-get	00:35:00	1
844706	99	82	73,5	cyclictest	867369	-21	kworker/u8:1+flush-179:0	20:30:23	0
844710	99	81	68,10	cyclictest	1213033	-21	systemd-journal	19:20:00	1
844710	99	80	66,11	cyclictest	1213033	-21	systemd-journal	19:49:09	1
844706	99	80	74,4	cyclictest	898038	-21	kworker/u8:2+flush-179:0	22:20:23	0
844710	99	79	61,14	cyclictest	510	-21	rs:main		1
844706	99	79	73,5	cyclictest	842509	-21	kworker/u8:0+flush-179:0	19:15:27	0
844706	99	78	73,4	cyclictest	923913	-21	kworker/u8:3+flush-179:0	00:10:16	0
844710	99	77	64,10	cyclictest	922542	-21	apt-get	23:10:11	1
844706	99	77	69,7	cyclictest	923913	-21	kworker/u8:3+events_unbound	23:55:00	0
844706	99	77	69,6	cyclictest	884887	-21	kworker/u8:3+events_unbound	21:40:18	0
844710	99	76	66,6	cyclictest	876937	-21	kworker/u8:2+flush-179:0	21:00:15	1
844710	99	76	59,13	cyclictest	891272	-21	apt-get	21:35:01	1
844706	99	74	69,3	cyclictest	857258	-21	kworker/u8:0+flush-179:0	19:45:21	0
844710	99	73	63,6	cyclictest	935907	-21	kworker/u8:2+events_unbound	00:00:23	1
844706	99	73	68,4	cyclictest	861077	-21	kworker/u8:0+events_unbound	20:20:24	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2020-10-04 - 12:21