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2026-05-24 - 23:20

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 the highest latencies:
System rackfslot4s.osadl.org (updated Sun May 24, 2026 12:44:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3014422810,3sleep030145-21chrt07:05:140
2248221260,3chrt22480-21ssh10:15:490
1420521260,2chrt14206-21runrttasks12:28:470
2478821240,2chrt24776-21df_inode09:30:440
1016621240,3chrt10162-21ntpq09:56:540
40721230,2chrt408-21sleep10:31:050
2093321170,3chrt20936-21sh11:50:350
1939621170,2chrt19399-21sh10:11:010
1274621150,3chrt12743-21pluginstate09:12:230
660321130,3chrt6602-21seq11:28:380
2149721130,3chrt21494-21python307:42:160
745121120,3chrt7453-21cut07:20:350
3046621120,2chrt30465-21cat12:05:040
2841821120,3chrt28419-21seq10:24:470
1945321120,2sleep019452-21cat07:40:070
2581121110,2chrt25812-21chrt11:08:440
1498221110,3chrt14985-21cut11:41:040
2283921100,2chrt22840-21sleep09:27:210
559721090,2sleep05599-21irqrtprio09:00:460
957121040,2chrt9572-21cat08:15:410
3082021040,2chrt30821-21sleep07:56:590
3050821040,3chrt30509-21seq09:39:160
2073521040,2chrt20736-21chrt12:38:340
1790921010,2sleep017910-21tune2fs11:45:520
134142970,2sleep013415-21seq11:39:060
87372960,2sleep08740-21chrt09:05:470
137772940,1sleep013779-21processes10:02:170
275282920,1sleep027531-21cut11:11:060
16572890,1sleep01658-21seq08:55:210
75812860,1sleep07582-21aten2.4_rfpower11:30:340
298322840,2sleep029833-21chrt11:15:100
7402780,1sleep0741-21seq11:20:100
40302760,2sleep04031-21chrt09:47:320
194962740,1sleep019499-21grep09:22:200
308812680,2sleep030883-21ls08:50:030
105892660,1sleep010588-21expr10:46:280
36852630,2sleep03686-21if_err_eth010:36:020
260282620,2sleep026033-21chrt08:41:410
323582610,2sleep032361-21aten2.4_rfpower08:00:270
198822600,2sleep019883-21seq11:00:060
145232590,3sleep014525-21gcc07:31:140
51582580,1sleep05161-21seq07:16:110
197412580,3chrt19720-21apt11:00:010
30732564,9sleep03093-21df08:05:280
287402554,8sleep028744-21sleep07:54:510
50302540,2sleep05031-21seq12:15:340
151422533,8sleep015140-21ntp_states10:52:410
121602523,7sleep012107-21apt-get08:20:210
65262493,8sleep06564-21/usr/sbin/munin10:40:350
231502494,7sleep023147-21diskstats07:45:320
8482480,3chrt842-21apt-get07:10:180
70932480,3chrt7091-21/usr/sbin/munin09:52:200
673904816,23cyclictest0-21swapper09:42:320
226052484,35sleep022608-21ntpq08:36:080
152112480,2chrt15208-21/usr/sbin/munin08:25:130
113432470,3chrt11340-21cat12:25:070
673904615,23cyclictest0-21swapper12:12:430
673904516,21cyclictest0-21swapper11:58:040
673904516,21cyclictest0-21swapper10:09:150
67390444,20cyclictest31647-21irqstats12:06:080
673904418,19cyclictest29490-21if_err_eth210:26:040
319452443,33sleep031971-21ntpq08:50:510
182982440,3sleep018297-21seq08:30:110
107732430,2sleep010772-21seq07:25:410
673904217,17cyclictest15917-21irqrtprio12:31:060
673904114,11cyclictest14294-21apt-get09:15:280
67390385,13cyclictest7180-21ntp_states08:11:200
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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