OSADL QA Farm on Real-time of Mainline Linux

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

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 rackbslot2.osadl.org (updated Fri Dec 26, 2025 12:44:44)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1098329	2	227	198,19	sleep2	0	-21	swapper/2	07:06:31	2
1098424	2	223	195,18	sleep1	0	-21	swapper/1	07:07:43	1
1098393	2	221	192,19	sleep0	0	-21	swapper/0	07:07:18	0
1098288	2	221	192,19	sleep3	0	-21	swapper/3	07:06:01	3
1098765	99	71	57,2	cyclictest	1181737	-21	ThreadPoolForeg	08:45:01	0
1098775	99	61	1,59	cyclictest	1208835	-21	kworker/u8:2+efi_rts_wq	10:06:33	3
1098765	99	56	3,52	cyclictest	1208835	-21	kworker/u8:2+efi_rts_wq	10:06:34	0
1098770	99	53	48,4	cyclictest	1229419	-21	kworker/u8:0+flush-179:0	10:30:26	1
1098775	99	50	47,2	cyclictest	1202749	-21	kworker/u8:4+flush-179:0	09:25:10	3
1098775	99	50	47,2	cyclictest	1137818	-21	kworker/u8:1+flush-179:0	08:00:16	3
1098775	99	50	39,10	cyclictest	1120311	-21	kworker/u8:2+flush-179:0	07:45:16	3
1098775	99	50	35,3	cyclictest	1181462	-21	munin-update	08:45:01	3
1098770	99	49	46,2	cyclictest	1133271	-21	kworker/u8:3+flush-179:0	09:15:15	1
1098770	99	49	45,3	cyclictest	1137818	-21	kworker/u8:1+flush-179:0	09:00:28	1
1098775	99	48	42,4	cyclictest	1148211	-21	kworker/u8:0+flush-179:0	08:25:15	3
1098770	99	48	44,3	cyclictest	1137818	-21	kworker/u8:1+events_unbound	09:40:13	1
1098772	99	47	42,3	cyclictest	1384041	-21	munin-limits	12:35:27	2
1098770	99	47	44,3	cyclictest	1362923	-21	kworker/u8:4+events_unbound	12:30:07	1
1098775	99	46	41,4	cyclictest	1137818	-21	kworker/u8:1+events_unbound	08:15:23	3
1098775	99	46	32,13	cyclictest	1208835	-21	kworker/u8:2+flush-179:0	10:10:07	3
1098772	99	46	1,44	cyclictest	1208835	-21	kworker/u8:2+efi_rts_wq	10:06:34	2
1098765	99	46	43,2	cyclictest	1148211	-21	kworker/u8:0+events_unbound	08:25:14	0
1098770	99	45	41,3	cyclictest	1356275	-21	apt-get	12:05:12	1
1098775	99	44	41,2	cyclictest	1198405	-21	kworker/u8:0+flush-179:0	09:05:26	3
1098775	99	44	38,4	cyclictest	1298055	-21	/usr/share/muni	11:00:13	3
1098775	99	44	38,4	cyclictest	1298055	-21	/usr/share/muni	11:00:12	3
1098770	99	44	40,3	cyclictest	1102936	-21	latency_hist	07:15:00	1
1098765	99	44	41,2	cyclictest	1208835	-21	kworker/u8:2+events_unbound	09:15:24	0
1098765	99	44	39,3	cyclictest	1102945	-21	munin-update	07:15:03	0
1098765	99	44	37,3	cyclictest	1336962	-21	chrome	11:45:01	0
1098765	99	44	3,40	cyclictest	1285129	-21	/usr/share/muni	10:45:00	0
1098775	99	43	38,3	cyclictest	1307062	-21	/usr/share/muni	11:10:02	3
1098770	99	43	40,2	cyclictest	1181771	-21	/usr/share/muni	08:45:00	1
1098765	99	43	41,2	cyclictest	1089733	-21	kworker/u8:2+events_unbound	07:10:11	0
1098765	99	43	40,2	cyclictest	1208835	-21	kworker/u8:2+events_unbound	10:15:17	0
1211912	2	42	0,1	chrt	1211909	-21	snmp_areswitch.	09:20:02	3
1098775	99	42	38,3	cyclictest	1336958	-21	CacheThread_Blo	11:45:00	3
1098775	99	42	37,4	cyclictest	1306752	-21	latency_hist	11:10:01	3
1098772	99	42	4,37	cyclictest	1233232	-21	/usr/share/muni	09:45:01	2
1098770	99	42	39,2	cyclictest	1208835	-21	kworker/u8:2+flush-179:0	10:20:14	1
1098765	99	42	40,1	cyclictest	1318	-21	snmpd	07:27:17	0
1098765	99	42	39,2	cyclictest	647964	-1	kworker/0:2H+kblockd	07:40:52	0
1098775	99	41	38,2	cyclictest	1208835	-21	kworker/u8:2+flush-179:0	11:30:05	3
1098775	99	41	37,3	cyclictest	1066970	-21	kworker/u8:0+flush-179:0	07:35:13	3
1098775	99	41	35,5	cyclictest	1190438	-21	/usr/share/muni	08:55:14	3
1098772	99	41	39,1	cyclictest	1318	-21	snmpd	10:44:48	2
1098772	99	41	38,2	cyclictest	1302593	-21	kworker/2:2+pm	11:20:49	2
1098772	99	41	38,2	cyclictest	1259245	-21	kworker/2:0+pm	10:21:20	2
1098772	99	41	37,2	cyclictest	1302593	-21	kworker/2:2+pm	11:15:12	2
1098772	99	41	37,2	cyclictest	1302593	-21	kworker/2:2+pm	11:15:12	2
1098772	99	41	36,3	cyclictest	1129838	-21	kworker/2:2+pm	08:05:01	2
1098770	99	41	38,2	cyclictest	1229419	-21	kworker/u8:0+flush-179:0	10:05:16	1
1098775	99	40	37,2	cyclictest	1208835	-21	kworker/u8:2+flush-179:0	11:35:05	3
1098775	99	40	35,4	cyclictest	1133911	-21	/usr/share/muni	07:50:13	3
1098775	99	40	34,2	cyclictest	1137818	-21	kworker/u8:1+events_unbound	08:35:13	3
1098772	99	40	38,1	cyclictest	1146304	-21	kworker/2:0+pm	08:46:06	2
1098772	99	40	37,2	cyclictest	1302593	-21	kworker/2:2+pm	11:30:37	2
1098772	99	40	37,2	cyclictest	1146304	-21	kworker/2:0+pm	08:55:27	2
1098770	99	40	36,3	cyclictest	1208835	-21	kworker/u8:2+flush-179:0	09:25:33	1
1098765	99	40	37,2	cyclictest	1275984	-21	gpgv	10:35:01	0
1098765	99	40	35,4	cyclictest	1276447	-21	/usr/share/muni	10:35:13	0
1098765	99	40	27,12	cyclictest	1190733	-1	kworker/0:1H+kblockd	09:05:10	0
1281655	2	39	0,1	sleep1	0	-21	swapper/1	10:40:06	1
1098775	99	39	36,2	cyclictest	1148211	-21	kworker/u8:0+flush-179:0	08:40:06	3
1098775	99	39	34,4	cyclictest	1239658	-21	ntpq	09:50:14	3
1098772	99	39	37,1	cyclictest	847147	-1	kworker/2:1H+kblockd	09:06:18	2
1098772	99	39	37,1	cyclictest	1302593	-21	kworker/2:2+pm	12:11:02	2
1098772	99	39	37,1	cyclictest	1259245	-21	kworker/2:0+pm	10:30:51	2
1098772	99	39	37,1	cyclictest	1146304	-21	kworker/2:0+pm	08:40:37	2
1098772	99	39	37,1	cyclictest	1146304	-21	kworker/2:0+pm	08:11:00	2
1098772	99	39	37,1	cyclictest	1129838	-21	kworker/2:2+pm	08:00:20	2
1098772	99	39	36,2	cyclictest	1302593	-21	kworker/2:2+pm	11:35:18	2
1098772	99	39	36,2	cyclictest	1215491	-21	kworker/2:1+pm	09:55:10	2
1098772	99	39	35,3	cyclictest	1032370	-21	kworker/2:0+pm	07:35:13	2
1098772	99	39	35,2	cyclictest	1366619	-21	kworker/2:1+pm	12:25:09	2
1098770	99	39	35,3	cyclictest	1306356	-21	kworker/u8:0+events_unbound	11:25:14	1
1098770	99	39	35,3	cyclictest	1098670	-21	kworker/u8:1+flush-179:0	07:20:20	1
1098765	99	39	36,2	cyclictest	1232518	-21	kworker/u8:3+events_unbound	09:45:24	0
1098775	99	38	35,2	cyclictest	1306356	-21	kworker/u8:0+flush-179:0	11:25:06	3
1098775	99	38	32,3	cyclictest	1208835	-21	kworker/u8:2+events_unbound	10:20:15	3
1098772	99	38	36,1	cyclictest	1302593	-21	kworker/2:2+pm	11:50:48	2
1098772	99	38	36,1	cyclictest	1302593	-21	kworker/2:2+pm	11:50:47	2
1098772	99	38	36,1	cyclictest	1302593	-21	kworker/2:2+pm	11:10:42	2
1098772	99	38	36,1	cyclictest	1146304	-21	kworker/2:0+pm	08:26:34	2
1098772	99	38	36,1	cyclictest	1129838	-21	kworker/2:2+pm	07:48:38	2
1098772	99	38	36,1	cyclictest	1032370	-21	kworker/2:0+pm	07:25:17	2
1098772	99	38	35,2	cyclictest	1215491	-21	kworker/2:1+pm	09:30:40	2
1098772	99	38	35,2	cyclictest	1032370	-21	kworker/2:0+pm	07:40:52	2
1098772	99	38	35,1	cyclictest	1146304	-21	kworker/2:0+pm	08:50:10	2
1098772	99	38	34,3	cyclictest	1032370	-21	kworker/2:0+pm	07:30:04	2
1098772	99	38	34,2	cyclictest	1259245	-21	kworker/2:0+pm	10:25:12	2
1098772	99	38	1,14	cyclictest	1194962	-21	ntpq	09:00:03	2
1098770	99	38	35,2	cyclictest	1285097	-21	chrome	10:45:01	1
1098770	99	38	35,2	cyclictest	1208835	-21	kworker/u8:2+flush-179:0	11:05:15	1
1098770	99	38	35,2	cyclictest	1133271	-21	kworker/u8:3+flush-179:0	08:25:06	1
1098770	99	38	35,2	cyclictest	1133271	-21	kworker/u8:3+flush-179:0	07:55:25	1
1098770	99	38	34,3	cyclictest	1327862	-21	kworker/u8:3+events_unbound	11:35:13	1
1098770	99	38	34,2	cyclictest	1094105	-1	kworker/1:1H+kblockd	09:50:03	1
1098770	99	38	33,4	cyclictest	1214922	-21	ntpq	09:20:20	1
1098770	99	38	31,3	cyclictest	1208835	-21	kworker/u8:2+events_unbound	11:35:00	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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