OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of system in rack #3, slot #4

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

Characteristics of the 100 highest latencies:

System rack3slot4.osadl.org (updated Sun Feb 15, 2026 00:46:27)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2992188	99	137	65,18	cyclictest	3112408	-21	kworker/u12:0+events_unbound@ flush_memcg_stats_dwork	22:15:43	0
2992188	99	127	103,15	cyclictest	3112408	-21	kworker/u12:0+events_unbound@ flush_memcg_stats_dwork	22:29:06	0
2992188	99	127	103,15	cyclictest	3112408	-21	kworker/u12:0+events_unbound@ flush_memcg_stats_dwork	22:29:06	0
2992188	99	126	68,39	cyclictest	3004715	-21	kworker/u12:1+events_unbound@ flush_memcg_stats_dwork	19:50:11	0
2992188	99	125	32,41	cyclictest	3043724	-1	kworker/0:0H+mmc_complete@ mmc_blk_mq_complete_work	23:00:02	0
2992188	99	125	32,41	cyclictest	3043724	-1	kworker/0:0H+mmc_complete@ mmc_blk_mq_complete_work	23:00:02	0
2992188	99	122	100,15	cyclictest	3245078	-21	kworker/u12:2+events_unbound@ flush_memcg_stats_dwork	00:18:28	0
2992188	99	121	65,31	cyclictest	3068806	-21	kworker/u12:1+events_unbound@ flush_memcg_stats_dwork	21:34:43	0
2992197	99	118	104,7	cyclictest	3230347	-21	kworker/u12:1+events_unbound@ flush_memcg_stats_dwork	23:43:22	2
2992188	99	116	1,103	cyclictest	0	-21	swapper/0	20:15:34	0
2992188	99	110	61,25	cyclictest	3294553	-21	kworker/u12:1+events_unbound@ flush_memcg_stats_dwork	00:37:03	0
2992188	99	109	86,15	cyclictest	3079230	-21	kworker/u12:2+events_unbound@ flush_memcg_stats_dwork	22:23:09	0
2992188	99	108	84,15	cyclictest	3026254	-21	kworker/u12:1+events_unbound@ flush_memcg_stats_dwork	20:40:40	0
2992206	99	107	101,3	cyclictest	0	-21	swapper/4	22:53:17	4
2992193	99	107	60,16	cyclictest	3030344	-21	kworker/u12:0+events_unbound@ flush_memcg_stats_dwork	21:21:54	1
2992188	99	107	85,15	cyclictest	3032438	-21	kworker/u12:1+events_unbound@ flush_memcg_stats_dwork	20:51:35	0
2992188	99	107	85,15	cyclictest	3030344	-21	kworker/u12:0+events_unbound@ flush_memcg_stats_dwork	20:59:35	0
2992188	99	107	85,15	cyclictest	3030344	-21	kworker/u12:0+events_unbound@ flush_memcg_stats_dwork	20:59:35	0
2992188	99	107	37,8	cyclictest	2995253	-21	kworker/u12:0+events_unbound@ flush_memcg_stats_dwork	19:17:38	0
2992206	99	106	95,6	cyclictest	3043908	-21	diskmemload-4	00:33:29	4
2992206	99	106	95,6	cyclictest	3043908	-21	diskmemload-4	00:33:29	4
2992188	99	106	61,26	cyclictest	3062421	-21	kworker/u12:0+events_unbound@ flush_memcg_stats_dwork	21:37:38	0
2992188	99	105	59,30	cyclictest	0	-21	swapper/0	22:35:00	0
2992188	99	104	2,89	cyclictest	0	-21	swapper/0	20:25:52	0
2992188	99	103	79,16	cyclictest	3149001	-21	kworker/u12:1+events_unbound@ flush_memcg_stats_dwork	23:15:34	0
2992206	99	101	89,7	cyclictest	3243608	-21	ssh	23:53:24	4
2992206	99	101	89,7	cyclictest	3243608	-21	ssh	23:53:24	4
2992197	99	101	87,7	cyclictest	3055360	-21	kworker/u12:1+events_unbound@ flush_memcg_stats_dwork	21:22:58	2
2992188	99	101	61,26	cyclictest	3275323	-21	kworker/u12:1+events_unbound@ flush_memcg_stats_dwork	00:22:00	0
2992188	99	100	75,16	cyclictest	3253044	-21	kworker/u12:1+events_unbound@ flush_memcg_stats_dwork	00:10:39	0
2992188	99	100	40,29	cyclictest	2989974	-21	kworker/u12:1+events_unbound@ flush_memcg_stats_dwork	19:12:53	0
2992206	99	99	93,3	cyclictest	0	-21	swapper/4	19:37:42	4
2992188	99	99	74,16	cyclictest	3062421	-21	kworker/u12:0+events_unbound@ flush_memcg_stats_dwork	21:46:44	0
2992206	99	98	83,9	cyclictest	3223731	-21	ssh	23:37:14	4
2992188	99	98	74,16	cyclictest	3020651	-21	kworker/u12:2+events_unbound@ flush_memcg_stats_dwork	20:35:27	0
2992188	99	97	72,17	cyclictest	3142573	-21	kworker/u12:2+events_unbound@ flush_memcg_stats_dwork	22:53:17	0
2992188	99	96	71,17	cyclictest	3008068	-21	kworker/u12:2+events_unbound@ flush_memcg_stats_dwork	20:06:02	0
2992188	99	96	71,17	cyclictest	3008068	-21	kworker/u12:2+events_unbound@ flush_memcg_stats_dwork	20:06:02	0
2992188	99	96	62,25	cyclictest	691	50	irq/529-eth0-Tx	23:35:45	0
2992188	99	95	33,16	cyclictest	690	50	irq/528-eth0-Tx	23:20:37	0
2992188	99	95	30,13	cyclictest	0	-21	swapper/0	00:33:17	0
2992188	99	95	30,13	cyclictest	0	-21	swapper/0	00:33:17	0
2992188	99	94	74,16	cyclictest	3142573	-21	kworker/u12:2+events_unbound@ flush_memcg_stats_dwork	22:36:28	0
2992188	99	94	71,16	cyclictest	3149001	-21	kworker/u12:1+events_unbound@ flush_memcg_stats_dwork	22:49:45	0
2992188	99	94	69,17	cyclictest	3180778	-21	kworker/u12:0+events_unbound@ flush_memcg_stats_dwork	23:13:18	0
2992188	99	94	68,18	cyclictest	3098350	-21	kworker/u12:3+events_unbound@ flush_memcg_stats_dwork	22:05:17	0
2992188	99	94	68,17	cyclictest	3030344	-21	kworker/u12:0+events_unbound@ flush_memcg_stats_dwork	21:05:31	0
2992188	99	94	60,4	cyclictest	0	-21	swapper/0	23:05:31	0
2992188	99	94	54,7	cyclictest	3062421	-21	kworker/u12:0+events_unbound@ flush_memcg_stats_dwork	21:50:28	0
2992206	99	93	81,6	cyclictest	3078273	-21	ssh	21:40:52	4
2992197	99	93	80,6	cyclictest	3062421	-21	kworker/u12:0+events_unbound@ flush_memcg_stats_dwork	21:46:14	2
2992197	99	93	66,8	cyclictest	3068806	-21	kworker/u12:1+events_unbound@ flush_memcg_stats_dwork	21:52:54	2
2992193	99	93	71,9	cyclictest	3180778	-21	kworker/u12:0+events_unbound@ flush_memcg_stats_dwork	23:42:04	1
2992188	99	93	69,16	cyclictest	3253044	-21	kworker/u12:1+events_unbound@ flush_memcg_stats_dwork	00:02:54	0
2992188	99	93	58,27	cyclictest	3180778	-21	kworker/u12:0+events_unbound@ flush_memcg_stats_dwork	23:42:17	0
2992197	99	92	78,7	cyclictest	3230347	-21	kworker/u12:1+events_unbound@ flush_memcg_stats_dwork	23:48:23	2
2992197	99	92	78,7	cyclictest	3230347	-21	kworker/u12:1+events_unbound@ flush_memcg_stats_dwork	23:48:23	2
2992188	99	92	73,16	cyclictest	3032438	-21	kworker/u12:1+events_unbound@ flush_memcg_stats_dwork	21:03:37	0
2992188	99	92	66,23	cyclictest	3040381	-21	kworker/u12:2+events_unbound@ flush_memcg_stats_dwork	21:27:39	0
2992188	99	92	54,27	cyclictest	689	50	irq/527-eth0-Tx	21:10:25	0
3146235	2	91	0,3	sleep3	36	-21	rcuc/3	22:35:36	3
2992206	99	91	82,4	cyclictest	3162628	-21	ssh	22:49:01	4
2992206	99	91	78,7	cyclictest	3067229	-21	ssh	21:32:10	4
2992188	99	91	53,13	cyclictest	0	-21	swapper/0	00:07:05	0
2992197	99	90	77,6	cyclictest	2997857	-21	kworker/u12:1+events_unbound@ flush_memcg_stats_dwork	19:32:41	2
2992197	99	90	77,6	cyclictest	2997857	-21	kworker/u12:1+events_unbound@ flush_memcg_stats_dwork	19:32:41	2
2992197	99	90	76,7	cyclictest	3012741	-21	kworker/u12:0+events_unbound@ flush_memcg_stats_dwork	20:07:47	2
2992197	99	90	76,7	cyclictest	3012741	-21	kworker/u12:0+events_unbound@ flush_memcg_stats_dwork	20:07:47	2
2992188	99	90	67,16	cyclictest	3237708	-21	kworker/u12:0+events_unbound@ flush_memcg_stats_dwork	23:57:08	0
2992188	99	90	65,17	cyclictest	3012741	-21	kworker/u12:0+events_unbound@ flush_memcg_stats_dwork	20:01:36	0
2992188	99	90	55,12	cyclictest	689	50	irq/527-eth0-Tx	21:40:35	0
2992188	99	90	29,15	cyclictest	0	-21	swapper/0	00:25:24	0
2992188	99	90	2,47	cyclictest	3098350	-21	kworker/u12:3+events_unbound@ sched_tick_remote	22:03:28	0
2992206	99	89	83,3	cyclictest	0	-21	swapper/4	23:31:34	4
2992206	99	89	83,3	cyclictest	0	-21	swapper/4	21:05:36	4
2992206	99	89	79,5	cyclictest	3054536	-21	ssh	21:22:00	4
2992197	99	89	65,9	cyclictest	3068806	-21	kworker/u12:1+events_unbound@ flush_memcg_stats_dwork	21:41:12	2
2992188	99	89	49,16	cyclictest	3040381	-21	kworker/u12:2+events_unbound@ flush_memcg_stats_dwork	21:23:09	0
2992197	99	88	74,7	cyclictest	3149001	-21	kworker/u12:1+events_unbound@ flush_memcg_stats_dwork	23:15:40	2
2992197	99	88	64,9	cyclictest	3055360	-21	kworker/u12:1+events_unbound@ flush_memcg_stats_dwork	21:26:34	2
2992193	99	88	75,6	cyclictest	3219983	-21	kworker/u12:2+events_unbound@ flush_memcg_stats_dwork	23:45:35	1
2992193	99	88	75,6	cyclictest	3219983	-21	kworker/u12:2+events_unbound@ flush_memcg_stats_dwork	23:45:35	1
2992202	99	87	76,7	cyclictest	210	-21	kswapd0	22:30:06	3
2992188	99	87	64,16	cyclictest	3002249	-21	kworker/u12:0+events_unbound@ flush_memcg_stats_dwork	19:37:42	0
2992188	99	87	62,17	cyclictest	3079230	-21	kworker/u12:2+events_unbound@ flush_memcg_stats_dwork	21:55:38	0
2992206	99	86	72,8	cyclictest	3259447	-21	ssh	00:05:43	4
2992197	99	86	72,7	cyclictest	3194489	-21	kworker/u12:2+events_unbound@ flush_memcg_stats_dwork	23:23:19	2
2992197	99	86	71,7	cyclictest	3180778	-21	kworker/u12:0+events_unbound@ flush_memcg_stats_dwork	23:05:53	2
2992188	99	86	63,16	cyclictest	3020651	-21	kworker/u12:2+events_unbound@ flush_memcg_stats_dwork	20:20:29	0
2992197	99	85	71,6	cyclictest	3042766	-21	kworker/u12:3+events_unbound@ flush_memcg_stats_dwork	21:36:22	2
2992188	99	85	62,16	cyclictest	3042766	-21	kworker/u12:3+events_unbound@ flush_memcg_stats_dwork	21:17:01	0
2992188	99	85	61,16	cyclictest	3230347	-21	kworker/u12:1+events_unbound@ flush_memcg_stats_dwork	23:50:58	0
2992188	99	85	61,16	cyclictest	3230347	-21	kworker/u12:1+events_unbound@ flush_memcg_stats_dwork	23:50:58	0
2992206	99	84	77,3	cyclictest	0	-21	swapper/4	20:29:34	4
2992206	99	84	72,6	cyclictest	3091610	-21	ssh	21:51:49	4
2992197	99	84	70,7	cyclictest	3172961	-21	kworker/u12:3+events_unbound@ flush_memcg_stats_dwork	23:01:11	2
2992197	99	84	68,7	cyclictest	3112408	-21	kworker/u12:0+events_unbound@ flush_memcg_stats_dwork	22:15:05	2
2992197	99	84	59,8	cyclictest	3149001	-21	kworker/u12:1+events_unbound@ flush_memcg_stats_dwork	23:25:36	2
2992193	99	84	70,7	cyclictest	3030344	-21	kworker/u12:0+events_unbound@ flush_memcg_stats_dwork	20:52:55	1
2992188	99	84	65,16	cyclictest	3149001	-21	kworker/u12:1+events_unbound@ flush_memcg_stats_dwork	22:41:32	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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