OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #4

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.

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 792 highest latencies:

System rackeslot4s.osadl.org (updated Wed Mar 04, 2026 12:44:05)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2796966	99	39	35,3	cyclictest	2984027	-21	kworker/u8:1+flush-259:0	11:35:01	3
2796957	99	36	30,4	cyclictest	2854650	-21	/usr/sbin/munin	08:05:13	0
2796964	99	34	30,3	cyclictest	3056658	-21	kworker/u8:4+flush-259:0	11:20:01	2
2796964	99	34	28,4	cyclictest	3087887	-21	latency_hist	11:50:01	2
2796961	99	32	28,3	cyclictest	3119535	-21	apt-get	12:20:11	1
2796966	99	31	27,3	cyclictest	2947519	-21	kworker/u8:1+events_unbound	09:50:17	3
2796964	99	31	27,3	cyclictest	509	-21	rs:main		2
2796957	99	31	28,2	cyclictest	2817584	-21	kworker/u8:0+events_unbound	07:55:17	0
2796957	99	31	27,3	cyclictest	2828231	-21	kworker/u8:4+flush-259:0	09:15:26	0
2796964	99	29	24,4	cyclictest	2952654	-21	latency_hist	09:40:00	2
2796964	99	28	24,3	cyclictest	2828231	-21	kworker/u8:4+flush-259:0	08:25:24	2
2796961	99	28	23,4	cyclictest	3031271	-21	base64	10:55:01	1
2796961	99	27	23,3	cyclictest	2828231	-21	kworker/u8:4+flush-259:0	08:25:15	1
2796957	99	27	23,3	cyclictest	2958480	-21	apt-get	09:45:11	0
2796957	99	27	23,3	cyclictest	2900810	-21	kworker/u8:1+events_unbound	09:05:25	0
2796957	99	26	23,2	cyclictest	3103856	-21	kworker/u8:0+events_unbound	12:09:33	0
2796957	99	26	22,3	cyclictest	3103856	-21	kworker/u8:0+events_unbound	12:20:14	0
2796957	99	26	22,3	cyclictest	3056658	-21	kworker/u8:4+events_unbound	11:31:33	0
2796957	99	26	22,3	cyclictest	2999706	-21	apt-get	10:25:11	0
2796957	99	26	20,4	cyclictest	2937458	-21	apt-get	09:25:11	0
2796957	99	26	19,5	cyclictest	2833542	-21	cat	07:45:01	0
2796964	99	25	21,3	cyclictest	2828231	-21	kworker/u8:4+flush-259:0	09:10:16	2
2796964	99	25	20,4	cyclictest	2973702	-21	latency_hist	09:59:59	2
2796957	99	25	22,2	cyclictest	2865139	-21	kworker/u8:1+events_unbound	08:30:25	0
2796957	99	25	22,2	cyclictest	2802044	-21	kworker/u8:1+events_unbound	07:18:32	0
2796964	99	24	18,4	cyclictest	2844563	-21	diskstats	07:55:14	2
2796957	99	24	22,2	cyclictest	2870509	-21	kworker/u8:2+events_unbound	08:53:44	0
2796957	99	24	21,2	cyclictest	2921844	-21	kworker/u8:2+flush-259:0	09:35:14	0
2796957	99	24	21,2	cyclictest	2900810	-21	kworker/u8:1+events_unbound	08:58:31	0
2796957	99	24	20,3	cyclictest	2921844	-21	kworker/u8:2+events_unbound	09:10:26	0
2796957	99	24	20,3	cyclictest	2828231	-21	kworker/u8:4+events_unbound	08:13:32	0
2796964	99	23	20,2	cyclictest	3009872	-21	gpgv	10:35:00	2
2796957	99	23	20,3	cyclictest	2984027	-21	kworker/u8:1+events_unbound	10:23:33	0
2796957	99	23	20,2	cyclictest	3093128	-21	kworker/u8:4+events_unbound	11:59:09	0
2796957	99	23	20,2	cyclictest	3025822	-21	kworker/u8:0+events_unbound	11:15:33	0
2796957	99	23	20,2	cyclictest	2890941	-21	kworker/u8:0+events_unbound	08:40:25	0
2796957	99	23	20,2	cyclictest	2776089	-21	kworker/u8:2+flush-259:0	07:10:17	0
2796966	99	22	15,5	cyclictest	2881001	-21	diskstats	08:30:12	3
2796957	99	22	20,2	cyclictest	3072681	-21	kworker/u8:2+events_unbound	12:13:33	0
2796957	99	22	19,3	cyclictest	2865139	-21	kworker/u8:1+events_unbound	08:20:24	0
2796957	99	22	19,3	cyclictest	2828231	-21	kworker/u8:4+events_unbound	08:28:39	0
2796957	99	22	19,2	cyclictest	2984027	-21	kworker/u8:1+events_unbound	11:44:33	0
2796957	99	22	19,2	cyclictest	2984027	-21	kworker/u8:1+events_unbound	10:45:24	0
2796957	99	22	19,2	cyclictest	2828231	-21	kworker/u8:4+events_unbound	08:04:56	0
2796957	99	22	18,3	cyclictest	2984267	-21	apt-get	10:10:12	0
2796957	99	22	18,3	cyclictest	2817584	-21	kworker/u8:0+events_unbound	07:38:24	0
2796964	99	21	18,2	cyclictest	2860240	-21	apt-get	08:10:12	2
2796961	99	21	17,3	cyclictest	2802044	-21	kworker/u8:1+flush-259:0	07:25:15	1
2796957	99	21	19,2	cyclictest	2802044	-21	kworker/u8:1+events_unbound	07:34:34	0
2796957	99	21	18,2	cyclictest	3103856	-21	kworker/u8:0+events_unbound	12:38:58	0
2796957	99	21	18,2	cyclictest	3025822	-21	kworker/u8:0+events_unbound	11:06:33	0
2796966	99	20	16,3	cyclictest	2828231	-21	kworker/u8:4+flush-259:0	08:55:18	3
2796966	99	20	14,4	cyclictest	2870281	-21	latency_hist	08:20:00	3
2796964	99	20	17,2	cyclictest	509	-21	rs:main		2
2796961	99	20	16,3	cyclictest	3093784	-21	apt-get	11:55:11	1
2796957	99	20	17,2	cyclictest	3087931	-21	kworker/u8:0+events_unbound	11:53:33	0
2796957	99	20	17,2	cyclictest	3072681	-21	kworker/u8:2+events_unbound	12:28:56	0
2796957	99	20	17,2	cyclictest	2921844	-21	kworker/u8:2+events_unbound	10:07:32	0
2796957	99	20	16,3	cyclictest	2828231	-21	kworker/u8:4+events_unbound	07:53:34	0
2796964	99	19	14,4	cyclictest	3124672	-21	/usr/sbin/munin	12:25:14	2
2796964	99	19	13,4	cyclictest	3081897	-21	ntpq	11:40:21	2
2796961	99	19	17,1	cyclictest	3134710	-21	sh	12:35:00	1
2796961	99	19	17,1	cyclictest	2838938	-21	cron	07:49:59	1
2796961	99	19	16,2	cyclictest	2828231	-21	kworker/u8:4+flush-259:0	09:15:21	1
2796961	99	19	16,1	cyclictest	3078648	-21	irqcore	11:40:16	1
2796957	99	19	17,2	cyclictest	2984027	-21	kworker/u8:1+events_unbound	10:56:34	0
2796957	99	19	17,2	cyclictest	2984027	-21	kworker/u8:1+events_unbound	10:44:33	0
2796957	99	19	17,2	cyclictest	2921844	-21	kworker/u8:2+events_unbound	09:34:13	0
2796957	99	19	16,2	cyclictest	2984027	-21	kworker/u8:1+events_unbound	11:02:32	0
2796957	99	19	16,2	cyclictest	2947519	-21	kworker/u8:1+events_unbound	09:56:04	0
2796957	99	19	16,2	cyclictest	2947519	-21	kworker/u8:1+events_unbound	09:53:56	0
2796957	99	19	16,2	cyclictest	2921844	-21	kworker/u8:2+events_unbound	10:34:33	0
2796966	99	18	15,2	cyclictest	2984027	-21	kworker/u8:1+flush-259:0	10:35:00	3
2796966	99	18	15,2	cyclictest	2817957	-21	sh	07:29:59	3
2796966	99	18	13,4	cyclictest	3014444	-21	ntpq	10:35:20	3
2796966	99	18	13,4	cyclictest	2828204	-21	latency_hist	07:40:00	3
2796964	99	18	15,2	cyclictest	3114115	-21	cron	12:15:00	2
2796964	99	18	15,2	cyclictest	3023016	-21	kthreadcore	10:45:17	2
2796964	99	18	14,3	cyclictest	2984027	-21	kworker/u8:1+flush-259:0	10:55:16	2
2796964	99	18	12,4	cyclictest	3026016	-21	diskstats	10:50:12	2
2796961	99	18	16,1	cyclictest	0	-21	swapper/1	12:15:00	1
2796961	99	18	13,4	cyclictest	3102903	-21	ntpq	12:00:18	1
2796961	99	18	13,4	cyclictest	2952773	-21	apt-key	09:40:00	1
2796961	99	18	0,16	cyclictest	1	-21	systemd	11:55:01	1
2796957	99	18	15,2	cyclictest	2802044	-21	kworker/u8:1+events_unbound	07:24:33	0
2796957	99	18	13,4	cyclictest	252	-21	systemd-journal	10:39:32	0
2796957	99	18	10,5	cyclictest	0	-21	swapper/0	08:35:20	0
2796964	99	17	14,2	cyclictest	3062160	-21	cron	11:25:00	2
2796964	99	17	14,1	cyclictest	0	-21	swapper/2	11:05:00	2
2796964	99	17	13,3	cyclictest	2900810	-21	kworker/u8:1+flush-259:0	09:10:01	2
2796964	99	17	11,5	cyclictest	2801159	-21	ntpq	07:10:21	2
2796961	99	17	15,1	cyclictest	2844146	-21	turbostat.cron	07:55:00	1
2796961	99	17	14,2	cyclictest	490	-21	dbus-daemon	10:35:00	1
2796961	99	17	14,2	cyclictest	3125119	-21	irqcore	12:25:16	1
2796961	99	17	13,3	cyclictest	2870516	-21	/usr/sbin/munin	08:20:22	1
2796961	99	17	12,4	cyclictest	2906578	-21	/usr/sbin/munin	08:55:23	1
2796961	99	17	11,4	cyclictest	252	-21	systemd-journal	07:34:59	1
2796957	99	17	14,2	cyclictest	3072681	-21	kworker/u8:2+events_unbound	11:39:17	0
2796957	99	17	14,2	cyclictest	3056658	-21	kworker/u8:4+events_unbound	11:29:32	0
2796957	99	17	14,2	cyclictest	3025822	-21	kworker/u8:0+events_unbound	11:11:27	0
2796957	99	17	14,2	cyclictest	2984027	-21	kworker/u8:1+events_unbound	11:45:07	0
2796957	99	17	14,2	cyclictest	2921844	-21	kworker/u8:2+events_unbound	09:44:56	0
2796957	99	17	14,2	cyclictest	2828231	-21	kworker/u8:4+events_unbound	07:46:33	0
2796957	99	17	13,3	cyclictest	3056658	-21	kworker/u8:4+events_unbound	11:20:26	0
2796957	99	17	13,3	cyclictest	2921844	-21	kworker/u8:2+events_unbound	10:17:06	0
2796966	99	16	13,2	cyclictest	3072681	-21	kworker/u8:2+flush-259:0	12:25:00	3
2796966	99	16	12,3	cyclictest	507	-21	in:imuxsock	09:40:00	3
2796966	99	16	12,3	cyclictest	3067313	-21	kworker/u8:0+flush-259:0	11:36:37	3
2796964	99	16	13,2	cyclictest	3071548	-21	ntp_kernel_pll_	11:30:20	2
2796964	99	16	1,13	cyclictest	1	-21	systemd	07:35:00	2
2796961	99	16	13,2	cyclictest	2972830	-21	ntp_kernel_pll_	09:55:21	1
2796961	99	16	12,3	cyclictest	2802286	-21	apt-get	07:15:13	1
2796957	99	16	9,5	cyclictest	2817054	-21	ntpq	07:25:19	0
2796957	99	16	14,2	cyclictest	3072681	-21	kworker/u8:2+events_unbound	12:17:31	0
2796957	99	16	14,1	cyclictest	603	50	irq/132-enp0s29f1:rx-0	08:45:14	0
2796957	99	16	14,1	cyclictest	603	50	irq/132-enp0s29f1:rx-0	08:15:15	0
2796957	99	16	13,2	cyclictest	2900810	-21	kworker/u8:1+events_unbound	09:01:12	0
2796957	99	16	13,1	cyclictest	19	1	rcu_preempt	12:30:12	0
2796957	99	16	12,3	cyclictest	2921844	-21	kworker/u8:2+events_unbound	10:03:55	0
2796966	99	15	9,4	cyclictest	3062173	-21	latency_hist	11:25:00	3
2796966	99	15	13,1	cyclictest	0	-21	swapper/3	08:09:59	3
2796966	99	15	12,2	cyclictest	3041856	-21	cpuspeed_turbos	11:05:12	3
2796966	99	15	11,3	cyclictest	3098262	-21	unixbench_singl	11:55:24	3
2796964	99	15	8,5	cyclictest	3076785	-21	ntpq	11:35:20	2
2796964	99	15	3,6	cyclictest	2890910	-21	munin-run	08:40:01	2
2796964	99	15	12,1	cyclictest	0	-21	swapper/2	11:55:01	2
2796964	99	15	11,3	cyclictest	2921844	-21	kworker/u8:2+flush-259:0	10:05:21	2
2796964	99	15	10,4	cyclictest	2812391	-21	apt-get	07:25:00	2
2796961	99	15	12,2	cyclictest	3104160	-21	cpuspeed_turbos	12:05:12	1
2796961	99	15	10,3	cyclictest	252	-21	systemd-journal	08:11:31	1
2796957	99	15	2,3	cyclictest	16	-21	ksoftirqd/0	09:20:19	0
2796957	99	15	12,2	cyclictest	3093128	-21	kworker/u8:4+events_unbound	12:00:59	0
2796966	99	14	9,4	cyclictest	2849302	-21	latency_hist	08:00:01	3
2796966	99	14	8,4	cyclictest	252	-21	systemd-journal	09:45:00	3
2796966	99	14	11,2	cyclictest	3090477	-21	kthreadcore	11:50:16	3
2796966	99	14	11,2	cyclictest	2984027	-21	kworker/u8:1+flush-259:0	11:02:37	3
2796966	99	14	11,2	cyclictest	2921844	-21	kworker/u8:2+flush-259:0	09:30:14	3
2796966	99	14	10,3	cyclictest	2833392	-21	apt-get	07:44:59	3
2796966	99	14	10,3	cyclictest	2753863	-21	kworker/u8:0+flush-259:0	07:19:37	3
2796964	99	14	8,5	cyclictest	3093615	-21	base64	11:55:01	2
2796964	99	14	8,4	cyclictest	2937433	-21	/usr/sbin/munin	09:25:19	2
2796964	99	14	2,6	cyclictest	2844122	-21	cron	07:54:59	2
2796964	99	14	12,1	cyclictest	0	-21	swapper/2	08:20:00	2
2796964	99	14	11,2	cyclictest	2985286	-21	kthreadcore	10:10:17	2
2796961	99	14	8,4	cyclictest	3051827	-21	latency_hist	11:15:01	1
2796961	99	14	8,4	cyclictest	252	-21	systemd-journal	08:34:59	1
2796961	99	14	12,1	cyclictest	0	-21	swapper/1	08:10:00	1
2796961	99	14	11,2	cyclictest	2817584	-21	kworker/u8:0+flush-259:0	08:00:00	1
2796961	99	14	11,2	cyclictest	2817584	-21	kworker/u8:0+flush-259:0	07:40:17	1
2796961	99	14	11,2	cyclictest	2817584	-21	kworker/u8:0+flush-259:0	07:35:13	1
2796961	99	14	11,2	cyclictest	0	-21	swapper/1	11:05:00	1
2796961	99	14	10,3	cyclictest	2828231	-21	kworker/u8:4+flush-259:0	08:01:37	1
2796961	99	14	10,3	cyclictest	2828231	-21	kworker/u8:4+events_unbound	08:35:15	1
2796961	99	14	10,3	cyclictest	2776089	-21	kworker/u8:2+flush-259:0	07:10:09	1
2796957	99	14	1,2	cyclictest	3026002	-21	/usr/sbin/munin	10:50:12	0
2796966	99	13	9,3	cyclictest	2828231	-21	kworker/u8:4+flush-259:0	09:00:15	3
2796966	99	13	8,3	cyclictest	2885999	-21	apt-get	08:35:09	3
2796966	99	13	10,2	cyclictest	2933335	-21	kthreadcore	09:20:18	3
2796964	99	13	9,3	cyclictest	2984027	-21	kworker/u8:1+flush-259:0	11:25:23	2
2796964	99	13	6,5	cyclictest	2895162	-21	ntpq	08:40:20	2
2796964	99	13	10,2	cyclictest	3130092	-21	fschecks_time	12:30:13	2
2796964	99	13	10,2	cyclictest	2994265	-21	cron	10:20:00	2
2796964	99	13	10,2	cyclictest	2908915	-21	tr	08:55:19	2
2796964	99	13	10,2	cyclictest	2827224	-21	needreboot	07:35:18	2
2796964	99	13	10,1	cyclictest	0	-21	swapper/2	11:15:00	2
2796961	99	13	11,1	cyclictest	0	-21	swapper/1	10:40:17	1
2796961	99	13	11,1	cyclictest	0	-21	swapper/1	09:45:00	1
2796961	99	13	10,2	cyclictest	500	-21	systemd-logind	11:25:01	1
2796961	99	13	10,2	cyclictest	2911785	-21	apt-get	09:00:11	1
2796966	99	12	9,2	cyclictest	2891230	-21	cpuspeed_turbos	08:40:12	3
2796966	99	12	9,2	cyclictest	2811900	-21	unixbench_multi	07:20:23	3
2796966	99	12	8,3	cyclictest	3134971	-21	apt-get	12:35:10	3
2796966	99	12	1,10	cyclictest	2854428	-21	awk	08:05:00	3
2796966	99	12	10,1	cyclictest	0	-21	swapper/3	10:55:01	3
2796964	99	12	8,3	cyclictest	252	-21	systemd-journal	11:09:31	2
2796964	99	12	7,4	cyclictest	2906335	-21	latency_hist	08:55:01	2
2796964	99	12	10,1	cyclictest	3118284	-21	needreboot	12:15:17	2
2796961	99	12	9,2	cyclictest	2811321	-21	missed_timers	07:20:17	1
2796961	99	12	8,3	cyclictest	2921844	-21	kworker/u8:2+flush-259:0	10:25:24	1
2796961	99	12	8,3	cyclictest	2921844	-21	kworker/u8:2+flush-259:0	09:25:20	1
2796961	99	12	10,1	cyclictest	0	-21	swapper/1	10:00:19	1
2796961	99	12	10,1	cyclictest	0	-21	swapper/1	08:45:15	1
2796966	99	11	9,1	cyclictest	0	-21	swapper/3	09:15:17	3
2796966	99	11	8,2	cyclictest	3062850	-21	irqcore	11:25:15	3
2796966	99	11	8,2	cyclictest	3047969	-21	sort	11:10:17	3
2796966	99	11	8,2	cyclictest	2968916	-21	cpuspeed_turbos	09:55:12	3
2796966	99	11	8,2	cyclictest	0	-21	swapper/3	11:40:13	3
2796966	99	11	8,2	cyclictest	0	-21	swapper/3	10:40:13	3
2796964	99	11	9,1	cyclictest	0	-21	swapper/2	09:15:13	2
2796964	99	11	8,2	cyclictest	3104316	-21	fschecks_time	12:05:13	2
2796964	99	11	8,2	cyclictest	3014350	-21	needreboot	10:35:17	2
2796964	99	11	8,2	cyclictest	2911851	-21	cpuspeed_turbos	09:00:11	2
2796964	99	11	8,2	cyclictest	2813143	-21	cpuspeed_turbos	07:25:11	2
2796964	99	11	6,4	cyclictest	3139465	-21	sshd	12:35:32	2
2796964	99	11	0,3	cyclictest	3004602	-21	munin-plugin-st	10:30:00	2
2796961	99	11	8,2	cyclictest	3067549	2	sleep1	11:30:11	1
2796961	99	11	8,2	cyclictest	3052343	-21	fschecks_time	11:15:14	1
2796961	99	11	8,2	cyclictest	3025921	-21	cpuspeed_turbos	10:50:12	1
2796961	99	11	8,2	cyclictest	2932578	-21	fschecks_time	09:20:15	1
2796961	99	11	7,3	cyclictest	252	-21	systemd-journal	08:45:00	1
2796961	99	11	7,2	cyclictest	0	-21	swapper/1	11:40:00	1
2796966	99	10	8,1	cyclictest	0	-21	swapper/3	10:45:15	3
2796966	99	10	8,1	cyclictest	0	-21	swapper/3	10:15:14	3
2796966	99	10	8,1	cyclictest	0	-21	swapper/3	08:20:15	3
2796966	99	10	7,2	cyclictest	2984332	-21	cpuspeed_turbos	10:10:12	3
2796966	99	10	7,2	cyclictest	2860305	-21	cpuspeed_turbos	08:10:13	3
2796966	99	10	7,2	cyclictest	2797234	-21	cpuspeed_turbos	07:10:13	3
2796966	99	10	7,2	cyclictest	0	-21	swapper/3	10:55:12	3
2796966	99	10	7,1	cyclictest	0	-21	swapper/3	10:25:23	3
2796966	99	10	4,4	cyclictest	2917472	-21	sed	09:05:16	3
2796964	99	10	8,1	cyclictest	0	-21	swapper/2	09:20:25	2
2796961	99	10	8,1	cyclictest	0	-21	swapper/1	09:45:16	1
2796961	99	10	7,2	cyclictest	2901527	-21	cpuspeed_turbos	08:50:12	1
2796961	99	10	4,4	cyclictest	2943223	-21	sed	09:30:15	1
2796966	99	9	5,4	cyclictest	49	1	ktimers/3	12:05:11	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2021-09-01 - 00:34