OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of system in rack #a, 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
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rackaslot4.osadl.org (updated Tue Oct 28, 2025 00:43:25)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3337626	99	26079	1,26074	cyclictest	1622	-21	snmpd		3
3337626	99	1238	1,1233	cyclictest	4180069	-21	sshd		3
3337636	99	1203	0,1200	cyclictest	3358267	-21	sshd		5
3337626	99	988	0,984	cyclictest	1622	-21	snmpd		3
3337626	99	879	1,874	cyclictest	46	-21	ksoftirqd/3		3
3337631	99	467	0,465	cyclictest	54	-21	ksoftirqd/4		4
3337631	99	467	0,465	cyclictest	54	-21	ksoftirqd/4		4
3337636	99	336	0,334	cyclictest	1622	-21	snmpd		5
3337631	99	313	0,311	cyclictest	1622	-21	snmpd		4
3337636	99	306	0,304	cyclictest	1622	-21	snmpd		5
3337636	99	285	0,283	cyclictest	1622	-21	snmpd		5
3337631	99	278	0,276	cyclictest	1622	-21	snmpd		4
3337631	99	265	1,262	cyclictest	1622	-21	snmpd		4
3337636	99	260	0,258	cyclictest	1622	-21	snmpd		5
3337636	99	260	0,258	cyclictest	1622	-21	snmpd		5
3337636	99	231	0,229	cyclictest	1622	-21	snmpd		5
3337636	99	229	7,220	cyclictest	1622	-21	snmpd		5
3337636	99	229	0,227	cyclictest	1622	-21	snmpd		5
3337631	99	218	1,215	cyclictest	1622	-21	snmpd		4
3337636	99	213	14,197	cyclictest	1622	-21	snmpd		5
3337636	99	194	0,192	cyclictest	1622	-21	snmpd		5
3337636	99	178	14,162	cyclictest	1622	-21	snmpd		5
3337636	99	170	0,168	cyclictest	1622	-21	snmpd		5
3337640	99	120	1,117	cyclictest	1622	-21	snmpd		6
3337626	99	82	0,79	cyclictest	1138	-21	sendmail-mta		3
3337636	99	75	28,46	cyclictest	310	-21	jbd2/mmcblk1p3-8		5
3337636	99	61	18,42	cyclictest	310	-21	jbd2/mmcblk1p3-8		5
3337626	99	54	1,49	cyclictest	1138	-21	sendmail-mta		3
3337626	99	51	1,47	cyclictest	567	-21	avahi-daemon		3
3337620	99	43	37,4	cyclictest	374	-21	systemd-journal		1
3337636	99	41	0,40	cyclictest	1622	-21	snmpd		5
3337626	99	41	1,37	cyclictest	1161	-21	munin-node		3
3337618	99	41	32,7	cyclictest	3387061	-21	/usr/sbin/munin		0
3337624	99	40	1,34	cyclictest	3638811	-21	kworker/2:0-mm_percpu_wq		2
3337620	99	39	33,4	cyclictest	310	-21	jbd2/mmcblk1p3-8		1
3337626	99	38	33,3	cyclictest	374	-21	systemd-journal		3
3337642	99	37	35,2	cyclictest	3445856	-21	kworker/u32:2+flush-179:96		7
3337624	99	37	1,35	cyclictest	3638811	-21	kworker/2:0-mm_percpu_wq		2
3337636	99	36	35,1	cyclictest	310	-21	jbd2/mmcblk1p3-8		5
3337636	99	36	34,2	cyclictest	310	-21	jbd2/mmcblk1p3-8		5
3337642	99	35	34,1	cyclictest	3434296	-21	kworker/u32:0+flush-179:96		7
3337642	99	35	34,1	cyclictest	3432565	-21	kworker/u32:1+flush-179:96		7
3337642	99	35	33,1	cyclictest	3384201	-21	kworker/u32:4+flush-179:96		7
3337642	99	35	33,1	cyclictest	3366202	-21	kworker/u32:2+flush-179:96		7
3337636	99	35	33,2	cyclictest	310	-21	jbd2/mmcblk1p3-8		5
3337636	99	35	33,2	cyclictest	310	-21	jbd2/mmcblk1p3-8		5
3337636	99	35	33,2	cyclictest	310	-21	jbd2/mmcblk1p3-8		5
3337631	99	35	34,1	cyclictest	3367900	-21	kworker/u32:3+flush-179:96		4
3337631	99	35	33,1	cyclictest	3358273	-21	kworker/u32:3+flush-179:96		4
3337626	99	35	30,3	cyclictest	374	-21	systemd-journal		3
3337626	99	35	1,31	cyclictest	871	-21	wpa_supplicant		3
3337620	99	35	30,4	cyclictest	3403210	-21	kworker/u32:1+flush-179:96		1
3337620	99	35	29,4	cyclictest	310	-21	jbd2/mmcblk1p3-8		1
3337636	99	34	33,1	cyclictest	3398059	-21	kworker/u32:0+flush-179:96		5
3337636	99	34	32,2	cyclictest	310	-21	jbd2/mmcblk1p3-8		5
3337631	99	34	33,1	cyclictest	3432565	-21	kworker/u32:1+flush-179:96		4
3337618	99	34	30,3	cyclictest	3638825	-21	kworker/0:1+pm		0
3337618	99	34	28,4	cyclictest	3638825	-21	kworker/0:1+pm		0
3337642	99	33	32,1	cyclictest	3415266	-21	kworker/u32:2+flush-179:96		7
3337642	99	33	32,1	cyclictest	3398059	-21	kworker/u32:0+flush-179:96		7
3337642	99	33	32,1	cyclictest	3379971	-21	kworker/u32:3+flush-179:96		7
3337642	99	33	32,1	cyclictest	3379971	-21	kworker/u32:3+flush-179:96		7
3337640	99	33	32,1	cyclictest	310	-21	jbd2/mmcblk1p3-8		6
3337636	99	33	31,2	cyclictest	310	-21	jbd2/mmcblk1p3-8		5
3337631	99	33	32,1	cyclictest	3421462	-21	kworker/u32:2+flush-179:96		4
3337631	99	33	31,2	cyclictest	3367900	-21	kworker/u32:3+flush-179:96		4
3337626	99	33	0,30	cyclictest	1617	-21	lldpd		3
3337624	99	33	29,2	cyclictest	1622	-21	snmpd		2
3337642	99	32	31,1	cyclictest	3353096	-21	kworker/u32:0+flush-179:96		7
3337642	99	32	31,1	cyclictest	310	-21	jbd2/mmcblk1p3-8		7
3337640	99	32	31,1	cyclictest	310	-21	jbd2/mmcblk1p3-8		6
3337640	99	32	31,1	cyclictest	310	-21	jbd2/mmcblk1p3-8		6
3337640	99	32	30,2	cyclictest	310	-21	jbd2/mmcblk1p3-8		6
3337636	99	32	31,1	cyclictest	310	-21	jbd2/mmcblk1p3-8		5
3337636	99	32	30,2	cyclictest	310	-21	jbd2/mmcblk1p3-8		5
3337636	99	32	30,2	cyclictest	310	-21	jbd2/mmcblk1p3-8		5
3337636	99	32	30,2	cyclictest	310	-21	jbd2/mmcblk1p3-8		5
3337631	99	32	31,1	cyclictest	3640281	-21	kworker/4:1+pm		4
3337624	99	32	0,28	cyclictest	3638811	-21	kworker/2:0-mm_percpu_wq		2
3337620	99	32	26,4	cyclictest	374	-21	systemd-journal		1
3337642	99	31	30,1	cyclictest	3606018	-21	kworker/u32:1+flush-179:96		7
3337640	99	31	30,1	cyclictest	3434296	-21	kworker/u32:0+flush-179:96		6
3337636	99	31	30,1	cyclictest	3641767	-21	kworker/5:0+pm		5
3337636	99	31	30,1	cyclictest	310	-21	jbd2/mmcblk1p3-8		5
3337631	99	31	30,1	cyclictest	3640281	-21	kworker/4:1+pm		4
3337631	99	31	30,1	cyclictest	3384198	-21	kworker/u32:0+flush-179:96		4
3337631	99	31	30,1	cyclictest	3342106	-21	kworker/u32:2+flush-179:96		4
3337631	99	31	29,2	cyclictest	4087736	-1	kworker/4:2H+kblockd		4
3337626	99	31	1,27	cyclictest	1161	-21	munin-node		3
3337626	99	31	1,27	cyclictest	1079	-21	ntpd		3
3337626	99	31	1,18	cyclictest	3389704	-21	latency_hist		3
3337642	99	30	29,1	cyclictest	3644525	-21	kworker/7:1+pm		7
3337642	99	30	29,1	cyclictest	3403210	-21	kworker/u32:1+flush-179:96		7
3337640	99	30	29,1	cyclictest	3384201	-21	kworker/u32:4+flush-179:96		6
3337640	99	30	28,2	cyclictest	310	-21	jbd2/mmcblk1p3-8		6
3337636	99	30	29,1	cyclictest	3641767	-21	kworker/5:0+pm		5
3337636	99	30	29,1	cyclictest	3606018	-21	kworker/u32:1+flush-179:96		5
3337626	99	30	1,18	cyclictest	3449377	-21	ntpq		3
3337626	99	30	1,17	cyclictest	3447570	-21	wc		3
3337626	99	30	1,17	cyclictest	3447570	-21	wc		3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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