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

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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 792 highest latencies:

System rackeslot4s.osadl.org (updated Wed May 27, 2026 12:44:06)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3638510	99	44	42,1	cyclictest	577786	-21	kworker/1:0+pm	08:38:21	1
3638510	99	44	40,3	cyclictest	3888430	-21	kworker/u8:0+flush-259:0	11:55:00	1
3638508	99	44	39,3	cyclictest	3914648	-21	kworker/u8:4+flush-259:0	11:40:20	0
3638508	99	41	36,3	cyclictest	3628460	-21	kworker/u8:3+events_unbound	07:45:01	0
3638518	99	39	34,3	cyclictest	3950642	-21	kworker/u8:2+flush-259:0	12:35:00	3
3638508	99	39	35,3	cyclictest	3716115	-21	kworker/u8:0+flush-259:0	08:50:01	0
3638508	99	38	30,6	cyclictest	3950031	-21	ntpq	12:05:22	0
3638513	99	36	30,4	cyclictest	3919753	-21	base64	11:40:00	2
3638510	99	36	31,3	cyclictest	335557	-21	systemd-journal	08:41:32	1
3638518	99	35	29,4	cyclictest	3710422	-21	ntpq	08:15:20	3
3638508	99	35	32,2	cyclictest	3914648	-21	kworker/u8:4+flush-259:0	11:45:20	0
3638508	99	34	30,3	cyclictest	21	1	rcuc/0	08:45:01	0
3638508	99	34	28,4	cyclictest	335557	-21	systemd-journal	10:45:00	0
3638513	99	33	26,5	cyclictest	3658542	-21	ntpq	07:25:21	2
3638508	99	33	28,3	cyclictest	3789454	-21	kworker/u8:2+flush-259:0	09:45:15	0
3638508	99	33	28,3	cyclictest	3789454	-21	kworker/u8:2+flush-259:0	09:45:15	0
3638518	99	32	27,4	cyclictest	335557	-21	systemd-journal	12:10:01	3
3638510	99	32	26,4	cyclictest	3830175	-21	ntpq	10:10:19	1
3638510	99	31	27,3	cyclictest	3805219	-21	kworker/u8:3+flush-259:0	10:20:25	1
3638510	99	31	25,4	cyclictest	3981769	-21	latency_hist	12:40:00	1
3638513	99	30	26,3	cyclictest	3841568	-21	cat	10:25:01	2
3638513	99	30	25,3	cyclictest	509	-21	rs:main		2
3638513	99	30	24,4	cyclictest	3893830	-21	latency_hist	11:15:00	2
3638508	99	30	26,3	cyclictest	3716115	-21	kworker/u8:0+events_unbound	09:01:33	0
3638510	99	29	23,4	cyclictest	335557	-21	systemd-journal	09:38:32	1
3638510	99	29	23,4	cyclictest	335557	-21	systemd-journal	07:22:31	1
3638508	99	29	25,3	cyclictest	3888430	-21	kworker/u8:0+events_unbound	11:54:34	0
3638508	99	29	25,3	cyclictest	3585191	-21	kworker/u8:4+events_unbound	07:12:39	0
3638508	99	29	23,4	cyclictest	3857399	-21	latency_hist	10:40:01	0
3638518	99	28	24,3	cyclictest	3830712	-21	kworker/u8:2+flush-259:0	11:05:14	3
3638510	99	28	22,4	cyclictest	3679616	-21	ntpq	07:45:21	1
3638510	99	28	21,5	cyclictest	3746554	-21	ntpq	08:50:21	1
3638518	99	27	21,4	cyclictest	335557	-21	systemd-journal	07:15:00	3
3638510	99	27	23,3	cyclictest	3888430	-21	kworker/u8:0+flush-259:0	11:45:23	1
3638508	99	27	24,2	cyclictest	3830712	-21	kworker/u8:2+flush-259:0	10:45:23	0
3638508	99	27	23,3	cyclictest	3914648	-21	kworker/u8:4+events_unbound	12:00:21	0
3638508	99	27	23,3	cyclictest	3914648	-21	kworker/u8:4+events_unbound	12:00:20	0
3638508	99	27	23,3	cyclictest	3585191	-21	kworker/u8:4+flush-259:0	07:15:16	0
3638513	99	26	23,2	cyclictest	3888430	-21	kworker/u8:0+flush-259:0	12:20:00	2
3638513	99	26	21,3	cyclictest	3716726	-21	/usr/sbin/munin	08:25:21	2
3638510	99	26	20,4	cyclictest	3857630	-21	/usr/sbin/munin	10:40:13	1
3638508	99	26	23,2	cyclictest	3585191	-21	kworker/u8:4+flush-259:0	07:55:26	0
3638508	99	26	22,3	cyclictest	3757781	-21	kworker/u8:2+events_unbound	09:07:34	0
3638508	99	26	22,3	cyclictest	3617959	-21	kworker/u8:1+events_unbound	08:20:19	0
3638508	99	26	18,5	cyclictest	3680454	-21	latency_hist	07:50:01	0
3638518	99	25	21,3	cyclictest	335557	-21	systemd-journal	11:30:00	3
3638508	99	25	21,3	cyclictest	3888430	-21	kworker/u8:0+events_unbound	11:20:23	0
3638508	99	25	21,3	cyclictest	3628460	-21	kworker/u8:3+events_unbound	08:04:33	0
3638508	99	25	20,4	cyclictest	3914648	-21	kworker/u8:4+events_unbound	12:13:32	0
3638508	99	25	19,4	cyclictest	3878032	-21	kworker/u8:1+flush-259:0	11:00:11	0
3638508	99	25	18,5	cyclictest	3638435	-21	latency_hist	07:10:00	0
3638518	99	24	20,3	cyclictest	3737124	-21	kworker/u8:3+flush-259:0	08:55:01	3
3638518	99	24	18,4	cyclictest	335557	-21	systemd-journal	08:00:00	3
3638513	99	24	19,3	cyclictest	3920263	-21	munin-node	11:40:10	2
3638510	99	24	20,3	cyclictest	3888430	-21	kworker/u8:0+events_unbound	12:05:18	1
3638508	99	24	21,2	cyclictest	3862787	-21	kworker/u8:0+flush-259:0	10:50:22	0
3638508	99	24	20,3	cyclictest	3970588	-21	ntpq	12:25:21	0
3638508	99	24	20,3	cyclictest	3914648	-21	kworker/u8:4+flush-259:0	11:40:00	0
3638508	99	24	20,3	cyclictest	3747682	-21	kworker/u8:1+flush-259:0	09:40:37	0
3638508	99	24	19,4	cyclictest	3767233	-21	ntpq	09:10:21	0
3638508	99	24	19,4	cyclictest	335557	-21	systemd-journal	10:20:00	0
3638508	99	24	19,3	cyclictest	3648979	-21	apt-get	07:20:10	0
3638508	99	24	16,5	cyclictest	3659625	-21	cp	07:30:01	0
3638513	99	23	19,3	cyclictest	3950642	-21	kworker/u8:2+flush-259:0	12:25:01	2
3638513	99	23	19,3	cyclictest	3675504	-21	kworker/u8:0+flush-259:0	07:45:16	2
3638513	99	23	1,20	cyclictest	1	-21	systemd	08:55:01	2
3638510	99	23	19,3	cyclictest	3805219	-21	kworker/u8:3+flush-259:0	09:50:24	1
3638510	99	23	19,2	cyclictest	3685598	-21	sh	07:54:59	1
3638508	99	23	20,2	cyclictest	3955983	-21	kworker/u8:1+events_unbound	12:24:33	0
3638508	99	23	19,3	cyclictest	3914648	-21	kworker/u8:4+flush-259:0	11:55:15	0
3638508	99	23	19,3	cyclictest	3747682	-21	kworker/u8:1+events_unbound	10:05:13	0
3638518	99	22	16,4	cyclictest	3701059	-21	latency_hist	08:10:01	3
3638513	99	22	18,3	cyclictest	3789454	-21	kworker/u8:2+flush-259:0	09:40:15	2
3638513	99	22	16,4	cyclictest	3976584	-21	latency_hist	12:35:01	2
3638510	99	22	18,3	cyclictest	3585191	-21	kworker/u8:4+flush-259:0	08:05:25	1
3638510	99	22	16,4	cyclictest	335557	-21	systemd-journal	07:39:00	1
3638510	99	22	14,6	cyclictest	3800043	-21	latency_hist	09:45:01	1
3638508	99	22	18,3	cyclictest	3747682	-21	kworker/u8:1+flush-259:0	09:25:19	0
3638508	99	22	16,4	cyclictest	509	-21	rs:main		0
3638508	99	22	15,5	cyclictest	3664175	-21	ntpq	07:30:22	0
3638518	99	21	17,3	cyclictest	3872971	-21	gpgv	10:55:02	3
3638518	99	21	15,4	cyclictest	3788976	-21	base64	09:35:00	3
3638518	99	21	15,4	cyclictest	335557	-21	systemd-journal	10:42:32	3
3638513	99	21	16,4	cyclictest	3951094	-21	/usr/sbin/munin	12:10:13	2
3638510	99	21	18,2	cyclictest	3976583	-21	sh	12:35:01	1
3638510	99	21	15,4	cyclictest	3773555	-21	apt-get	09:20:11	1
3638508	99	21	17,3	cyclictest	3617959	-21	kworker/u8:1+events_unbound	08:15:14	0
3638508	99	21	16,4	cyclictest	3665265	-21	apt-get	07:35:12	0
3638508	99	21	14,5	cyclictest	3705276	-21	ntpq	08:10:20	0
3638518	99	20	15,4	cyclictest	3847042	-21	latency_hist	10:30:01	3
3638518	99	20	14,4	cyclictest	3752868	-21	apt-get	09:00:12	3
3638513	99	20	18,1	cyclictest	0	-21	swapper/2	08:40:01	2
3638510	99	20	16,3	cyclictest	3888965	-21	apt-get	11:10:11	1
3638510	99	20	14,4	cyclictest	3914648	-21	kworker/u8:4+flush-259:0	11:35:15	1
3638510	99	20	14,4	cyclictest	3878640	-21	/usr/sbin/munin	11:00:13	1
3638508	99	20	16,3	cyclictest	3862787	-21	kworker/u8:0+flush-259:0	10:55:16	0
3638508	99	20	14,4	cyclictest	335557	-21	systemd-journal	08:05:32	0
3638508	99	20	13,5	cyclictest	3899002	-21	latency_hist	11:20:00	0
3638518	99	19	15,3	cyclictest	335557	-21	systemd-journal	11:44:59	3
3638518	99	19	14,3	cyclictest	3794418	-21	latency_hist	09:40:00	3
3638513	99	19	15,3	cyclictest	3670420	-21	apt-get	07:40:11	2
3638510	99	19	15,3	cyclictest	3815193	-21	kworker/u8:0+flush-259:0	10:35:15	1
3638510	99	19	13,4	cyclictest	3762933	-21	latency_hist	09:10:00	1
3638510	99	19	12,5	cyclictest	3956251	-21	/usr/sbin/munin	12:15:14	1
3638508	99	19	16,2	cyclictest	3747682	-21	kworker/u8:1+events_unbound	09:39:23	0
3638508	99	19	15,3	cyclictest	3888430	-21	kworker/u8:0+flush-259:0	12:30:24	0
3638508	99	19	15,3	cyclictest	3617959	-21	kworker/u8:1+flush-259:0	08:30:22	0
3638508	99	19	13,4	cyclictest	3841419	-21	latency_hist	10:25:01	0
3638508	99	19	13,4	cyclictest	3773294	-21	latency_hist	09:20:00	0
3638518	99	18	15,2	cyclictest	3757781	-21	kworker/u8:2+flush-259:0	09:10:17	3
3638518	99	18	14,3	cyclictest	3628460	-21	kworker/u8:3+flush-259:0	08:00:37	3
3638518	99	18	13,4	cyclictest	3919806	-21	gpgv	11:40:00	3
3638513	99	18	15,2	cyclictest	3888430	-21	kworker/u8:0+flush-259:0	11:51:02	2
3638513	99	18	15,2	cyclictest	3830712	-21	kworker/u8:2+flush-259:0	10:45:26	2
3638513	99	18	13,3	cyclictest	335557	-21	systemd-journal	10:35:32	2
3638510	99	18	15,2	cyclictest	3920698	-21	irqcore	11:40:16	1
3638510	99	18	11,5	cyclictest	3841416	-21	apt-get	10:25:01	1
3638508	99	18	15,2	cyclictest	3737124	-21	kworker/u8:3+flush-259:0	08:55:19	0
3638508	99	18	14,3	cyclictest	3747682	-21	kworker/u8:1+events_unbound	10:02:06	0
3638508	99	18	14,3	cyclictest	3747682	-21	kworker/u8:1+events_unbound	09:57:05	0
3638508	99	18	14,3	cyclictest	3617959	-21	kworker/u8:1+events_unbound	07:50:27	0
3638518	99	17	15,1	cyclictest	3833639	-21	kthreadcore	10:15:16	3
3638518	99	17	12,4	cyclictest	3670162	-21	latency_hist	07:40:01	3
3638513	99	17	13,3	cyclictest	3617959	-21	kworker/u8:1+flush-259:0	08:45:24	2
3638513	99	17	13,3	cyclictest	335557	-21	systemd-journal	09:52:32	2
3638513	99	17	13,3	cyclictest	335557	-21	systemd-journal	07:30:01	2
3638510	99	17	14,2	cyclictest	3789004	-21	latency_hist	09:35:00	1
3638510	99	17	12,4	cyclictest	3815814	-21	/usr/sbin/munin	10:00:19	1
3638510	99	17	11,4	cyclictest	3971423	-21	latency_hist	12:30:00	1
3638510	99	17	10,2	cyclictest	2971	-21	cron	09:00:01	1
3638508	99	17	14,2	cyclictest	3955983	-21	kworker/u8:1+flush-259:0	12:15:14	0
3638508	99	17	13,3	cyclictest	3830712	-21	kworker/u8:2+flush-259:0	11:05:14	0
3638508	99	17	13,3	cyclictest	3716115	-21	kworker/u8:0+flush-259:0	08:50:32	0
3638508	99	17	13,3	cyclictest	3617959	-21	kworker/u8:1+events_unbound	08:39:33	0
3638508	99	17	12,3	cyclictest	603	50	irq/132-enp0s29f1:rx-0	09:50:22	0
3638518	99	16	13,2	cyclictest	3914648	-21	kworker/u8:4+flush-259:0	11:55:23	3
3638518	99	16	13,2	cyclictest	3898994	-21	idleruntime-cro	11:20:00	3
3638518	99	16	13,2	cyclictest	3731947	-21	turbostat.cron	08:40:00	3
3638518	99	16	12,3	cyclictest	3648954	-21	/usr/sbin/munin	07:20:13	3
3638513	99	16	14,1	cyclictest	3936113	-21	irqcore	11:55:16	2
3638513	99	16	13,2	cyclictest	3617959	-21	kworker/u8:1+flush-259:0	08:45:01	2
3638513	99	16	12,3	cyclictest	3773314	-21	kworker/u8:5+flush-259:0	09:20:15	2
3638513	99	16	11,4	cyclictest	3842103	-21	apt-get	10:25:11	2
3638513	99	16	11,4	cyclictest	335557	-21	systemd-journal	11:49:31	2
3638510	99	16	14,1	cyclictest	3873961	-21	irqcore	10:55:16	1
3638510	99	16	13,2	cyclictest	3742242	-21	idleruntime-cro	08:50:00	1
3638510	99	16	13,1	cyclictest	0	-21	swapper/1	10:55:00	1
3638508	99	16	12,3	cyclictest	3888430	-21	kworker/u8:0+events_unbound	11:25:07	0
3638508	99	16	12,3	cyclictest	3842070	-21	kworker/u8:4+flush-259:0	10:30:22	0
3638508	99	16	12,3	cyclictest	3773314	-21	kworker/u8:5+flush-259:0	09:20:23	0
3638508	99	16	11,3	cyclictest	3805219	-21	kworker/u8:3+flush-259:0	10:10:10	0
3638508	99	16	10,4	cyclictest	3950642	-21	kworker/u8:2+events_unbound	12:39:20	0
3638518	99	15	12,2	cyclictest	3914648	-21	kworker/u8:4+flush-259:0	11:45:04	3
3638518	99	15	12,2	cyclictest	3659901	-21	apt-config	07:30:00	3
3638518	99	15	11,3	cyclictest	3585191	-21	kworker/u8:4+flush-259:0	07:50:00	3
3638518	99	15	10,3	cyclictest	335557	-21	systemd-journal	10:15:00	3
3638513	99	15	13,1	cyclictest	3901538	-21	kthreadcore	11:20:18	2
3638513	99	15	13,1	cyclictest	0	-21	swapper/2	07:25:00	2
3638513	99	15	12,2	cyclictest	3722908	-21	kthreadcore	08:30:17	2
3638513	99	15	11,3	cyclictest	3830712	-21	kworker/u8:2+flush-259:0	11:00:16	2
3638513	99	15	11,3	cyclictest	3617959	-21	kworker/u8:1+flush-259:0	08:20:23	2
3638510	99	15	9,4	cyclictest	3909518	-21	/usr/sbin/munin	11:30:13	1
3638510	99	15	13,1	cyclictest	3706207	-21	idleruntime-cro	08:15:00	1
3638510	99	15	11,3	cyclictest	3914648	-21	kworker/u8:4+flush-259:0	12:10:15	1
3638510	99	15	10,3	cyclictest	3628460	-21	kworker/u8:3+flush-259:0	07:25:18	1
3638508	99	15	12,2	cyclictest	603	50	irq/132-enp0s29f1:rx-0	11:10:12	0
3638508	99	15	11,3	cyclictest	3747682	-21	kworker/u8:1+events_unbound	09:32:16	0
3638518	99	14	12,1	cyclictest	0	-21	swapper/3	07:35:00	3
3638518	99	14	11,2	cyclictest	3815943	-21	cpuspeed_turbos	10:00:12	3
3638518	99	14	11,2	cyclictest	3769394	-21	tr	09:15:16	3
3638518	99	14	11,2	cyclictest	3762962	-21	kworker/u8:4+flush-259:0	09:25:00	3
3638518	99	14	11,2	cyclictest	3716115	-21	kworker/u8:0+flush-259:0	08:34:03	3
3638518	99	14	10,3	cyclictest	3617959	-21	kworker/u8:1+flush-259:0	08:42:03	3
3638513	99	14	10,3	cyclictest	3747682	-21	kworker/u8:1+flush-259:0	10:10:22	2
3638513	99	14	10,3	cyclictest	335557	-21	systemd-journal	09:13:32	2
3638510	99	14	8,4	cyclictest	335557	-21	systemd-journal	10:17:00	1
3638510	99	14	6,5	cyclictest	335557	-21	systemd-journal	09:15:00	1
3638510	99	14	11,2	cyclictest	3899267	-21	apt-get	11:20:11	1
3638510	99	14	11,2	cyclictest	0	-21	swapper/1	07:30:16	1
3638510	99	14	10,3	cyclictest	3644098	-21	fschecks_time	07:15:16	1
3638508	99	14	11,2	cyclictest	603	50	irq/132-enp0s29f1:rx-0	10:26:44	0
3638518	99	13	9,3	cyclictest	3930520	-21	apt-get	11:50:10	3
3638518	99	13	11,1	cyclictest	3971421	-21	apt	12:30:00	3
3638518	99	13	10,2	cyclictest	3893364	-21	unixbench_multi	11:10:24	3
3638518	99	13	10,2	cyclictest	3674798	-21	unixbench_multi	07:40:23	3
3638518	99	13	10,2	cyclictest	0	-21	swapper/3	12:15:00	3
3638518	99	13	10,2	cyclictest	0	-21	swapper/3	09:50:01	3
3638518	99	13	10,2	cyclictest	0	-21	swapper/3	09:50:00	3
3638513	99	13	9,3	cyclictest	3805219	-21	kworker/u8:3+flush-259:0	10:10:00	2
3638513	99	13	10,2	cyclictest	3815193	-21	kworker/u8:0+flush-259:0	10:00:24	2
3638513	99	13	10,2	cyclictest	3685592	-21	sh	07:55:00	2
3638513	99	13	10,2	cyclictest	0	-21	swapper/2	07:15:18	2
3638513	99	13	10,1	cyclictest	0	-21	swapper/2	12:00:14	2
3638513	99	13	10,1	cyclictest	0	-21	swapper/2	12:00:14	2
3638510	99	13	9,3	cyclictest	3789454	-21	kworker/u8:2+flush-259:0	09:45:24	1
3638510	99	13	9,3	cyclictest	3789454	-21	kworker/u8:2+flush-259:0	09:45:24	1
3638510	99	13	8,4	cyclictest	3747682	-21	kworker/u8:1+flush-259:0	09:55:05	1
3638510	99	13	10,2	cyclictest	3888430	-21	kworker/u8:0+flush-259:0	11:55:03	1
3638510	99	13	10,2	cyclictest	2971	-21	cron	12:05:01	1
3638510	99	13	10,2	cyclictest	2971	-21	cron	12:05:00	1
3638508	99	13	10,2	cyclictest	603	50	irq/132-enp0s29f1:rx-0	11:30:12	0
3638518	99	12	9,2	cyclictest	3883072	-21	unixbench_multi	11:00:23	3
3638518	99	12	10,1	cyclictest	0	-21	swapper/3	10:25:00	3
3638518	99	12	10,1	cyclictest	0	-21	swapper/3	10:00:00	3
3638513	99	12	9,2	cyclictest	3847365	-21	cpuspeed_turbos	10:30:11	2
3638513	99	12	9,2	cyclictest	3747682	-21	kworker/u8:1+flush-259:0	08:55:26	2
3638513	99	12	10,1	cyclictest	0	-21	swapper/2	11:15:22	2
3638510	99	12	7,3	cyclictest	3830712	-21	kworker/u8:2+flush-259:0	11:15:03	1
3638518	99	11	9,1	cyclictest	3742255	-21	cron	08:50:01	3
3638518	99	11	8,2	cyclictest	3805880	-21	irqcore	09:50:15	3
3638518	99	11	8,2	cyclictest	3758279	-21	fschecks_time	09:05:13	3
3638518	99	11	8,2	cyclictest	3643964	-21	cpuspeed_turbos	07:15:14	3
3638518	99	11	0,3	cyclictest	3798914	2	sort	09:40:17	3
3638513	99	11	8,2	cyclictest	3909608	-21	cpuspeed_turbos	11:30:12	2
3638513	99	11	8,2	cyclictest	3695484	-21	unixbench_singl	08:00:26	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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