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2026-08-15 - 09:27

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #f, 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 
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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 all highest latencies:
System rackfslot4s.osadl.org (updated Sat Aug 15, 2026 00:44:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1063621240,3chrt10635-21awk21:10:380
2733621220,2chrt27337-21aten2.4_rfpower20:45:220
651421170,3chrt6515-21/usr/sbin/munin22:41:010
413421170,3chrt4136-21chrt21:00:190
2417521150,2chrt24174-21rm21:30:470
2748421140,2sleep027489-21seq22:23:440
2336521140,3chrt23366-21chrt22:17:340
1727121140,3chrt17272-21awk21:20:340
516421130,2chrt5165-21sleep00:16:200
2239021130,3chrt22391-21seq23:53:460
1636421120,3chrt16365-21sleep20:27:160
2879021110,2chrt28791-21runrttasks00:03:090
992421090,3chrt9922-21/usr/sbin/munin21:57:280
1275221050,2sleep012753-21seq22:01:390
1501421020,2chrt15015-21sh19:34:480
56921010,2sleep0570-21chrt21:43:460
1726121010,3chrt17262-21sh19:37:260
2660521000,3chrt26606-21sh19:52:290
15872980,2sleep01589-21awk21:45:340
51252960,1sleep05126-21chrt20:10:280
169982960,2sleep017001-21sed22:56:300
99162950,1sleep09915-21seq00:23:230
126172950,2sleep012619-21aten2.4_rfpower22:50:330
73622940,2sleep07364-21cut23:31:040
23042930,2sleep02305-21chrt23:23:220
42952920,2sleep04296-21run-parts19:16:260
148282920,1sleep014829-21latency21:16:200
219382850,2sleep021939-21seq20:35:490
310492840,2sleep031050-21seq00:06:260
184592780,2sleep018458-21uname00:36:100
212252770,2sleep021226-21ssh22:15:020
311022768,17sleep031106-21sleep19:07:330
283302760,2sleep028331-21seq23:13:560
299122740,2sleep029913-21seq22:27:110
136452740,2sleep013646-21chrt00:29:240
170502720,1sleep017051-21fschecks_count23:45:540
306862700,2sleep030687-21seq19:59:360
92932670,2sleep09296-21chrt19:25:260
210822670,1sleep021083-21chrt23:02:280
242492610,2sleep024251-21awk20:40:230
164302590,1sleep016431-21chrt00:33:090
155252590,3sleep015527-21sleep23:43:110
314462573,6sleep031452-21ntpq20:51:030
32061905618,20cyclictest0-21swapper21:29:310
322092530,2sleep032208-21sed23:20:050
314602534,40sleep031530-21tune2fs20:00:370
243802523,41sleep024368-21ntpq23:56:250
113632523,42sleep011358-21ntp_states23:36:520
227302513,7sleep022726-21df23:05:370
135312513,6sleep013535-21sleep20:23:160
46042503,7sleep04631-21munin-run20:10:010
6672493,39sleep0661-21ntpq22:31:590
48652493,38sleep04862-21ntpq23:27:100
32061904921,9cyclictest412-21snmpd22:49:360
163092490,3chrt16283-21ntpq22:07:020
32061904818,23cyclictest0-21swapper00:13:160
32061904718,21cyclictest0-21swapper21:54:500
32061904716,23cyclictest0-21swapper21:35:090
32061904616,23cyclictest0-21swapper22:39:070
32061904512,9cyclictest22994-21python319:46:250
3206190445,18cyclictest17492-21apt-get20:30:410
3206190436,10cyclictest8778-21diskstats20:16:230
3206190415,9cyclictest8680-21python321:06:260
3206190414,18cyclictest1013-21ntp_states19:11:160
201452410,3chrt20146-21sh19:41:450
32061904014,9cyclictest2013-21ntpq20:55:530
32061904011,13cyclictest8585-21runrttasks19:24:100
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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