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2026-05-27 - 23:01

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #6

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 100 highest latencies:
System rackeslot6s.osadl.org (updated Wed May 27, 2026 12:44:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1699305998115,32cyclictest311ktimers/208:15:182
1699302998074,3cyclictest1743931-21cmp11:30:010
169930299751,66cyclictest1723111-21fschecks_time09:25:220
169930299722,62cyclictest1712054-21wc08:20:260
1699302997029,32cyclictest20650irq/252-8000000.ethernet10:20:270
1699302997028,36cyclictest1754859-21grep12:30:290
1699302996832,32cyclictest20650irq/252-8000000.ethernet11:15:250
1699302996827,38cyclictest0-21swapper/009:30:280
1699302996733,28cyclictest167350irq/118-8000000.ethernet-tx010:25:230
1699302996622,37cyclictest1752326-21users12:15:290
169930299661,6cyclictest1699368-21latency_hist07:10:010
169930299661,51cyclictest0-21swapper/009:15:100
169930299661,3cyclictest1751130-21irqstats12:10:230
1699302996425,35cyclictest1752670-21cut12:20:190
169930299633,4cyclictest1745307-21phc2sys-jitter11:35:250
1699302996235,23cyclictest167350irq/118-8000000.ethernet-tx007:55:270
1699302996233,24cyclictest20650irq/252-8000000.ethernet08:30:010
1699305996155,3cyclictest1700086-21kworker/u8:0-ext4-rsv-conversion08:05:012
169930299612,4cyclictest1725310-21latency_hist09:40:010
1699302996122,31cyclictest1730580-21df_inode10:10:150
169930299612,14cyclictest1700106-21latency_hist07:15:010
169930299612,14cyclictest1700106-21latency_hist07:15:000
1699302996030,26cyclictest20650irq/252-8000000.ethernet09:25:010
1699302996028,28cyclictest20650irq/252-8000000.ethernet07:25:240
169930299602,55cyclictest0-21swapper/010:30:240
169930299602,10cyclictest1746074-21/usr/sbin/munin11:40:220
169930299598,4cyclictest131ktimers/007:20:230
1699302995931,25cyclictest1715684-21grep08:40:280
169930299592,4cyclictest1716687-21head08:45:290
1699302995916,38cyclictest0-21swapper/012:30:010
1699302995916,38cyclictest0-21swapper/012:30:010
1699302995834,20cyclictest1728535-21grep09:55:290
1699302995731,24cyclictest167350irq/118-8000000.ethernet-tx007:15:220
1699302995730,24cyclictest20850irq/208-8000000.ethernet10:55:280
1699302995720,33cyclictest0-21swapper/008:55:210
169930299571,15cyclictest1704838-21apt-get07:40:150
1699302995631,22cyclictest20850irq/208-8000000.ethernet11:20:200
1699302995627,26cyclictest1727770-21cron09:55:000
1699302995623,29cyclictest1706973-21grep07:50:250
169930299562,14cyclictest1750614-21grep12:05:290
1699302995621,32cyclictest1703199-21ssh07:30:170
169930299561,49cyclictest1713161-21apt-get08:30:040
1699302995527,24cyclictest20650irq/252-8000000.ethernet08:35:250
1699302995523,28cyclictest20650irq/252-8000000.ethernet11:55:170
169930299552,10cyclictest1708853-21grep08:00:300
1699302995514,37cyclictest0-21swapper/007:45:280
169930599541,32cyclictest311ktimers/212:30:022
169930599541,32cyclictest311ktimers/212:30:012
169930299544,44cyclictest1731957-21grep10:15:270
169930299543,47cyclictest0-21swapper/008:10:250
1699302995433,16cyclictest1720890-21grep09:10:290
1699302995429,21cyclictest20650irq/252-8000000.ethernet12:35:170
1699302995429,21cyclictest20650irq/252-8000000.ethernet09:00:180
1699302995429,21cyclictest20650irq/252-8000000.ethernet09:00:180
1699302995428,22cyclictest20650irq/252-8000000.ethernet10:45:200
1699302995428,22cyclictest20650irq/252-8000000.ethernet10:45:200
1699302995427,23cyclictest20650irq/252-8000000.ethernet10:50:150
169930299534,44cyclictest1728951-21grep10:00:190
169930299533,4cyclictest1730279-21grep10:05:280
1699302995325,24cyclictest0-21swapper/011:45:180
1699302995325,24cyclictest0-21swapper/011:45:180
169930299531,9cyclictest1704403-21/usr/sbin/munin07:35:270
169930299531,9cyclictest1704403-21/usr/sbin/munin07:35:270
1699302995318,32cyclictest1744382-21sshd11:30:230
169930299531,49cyclictest1711305-21/usr/sbin/munin08:15:270
1699305995238,9cyclictest0-21swapper/211:55:282
169930299523,12cyclictest1726032-21grep09:40:270
169930299522,6cyclictest1747920-21/usr/sbin/munin11:50:260
169930299522,10cyclictest1735218-21/usr/sbin/munin10:35:280
169930299512,6cyclictest1736128-21grep10:40:270
169930299511,9cyclictest1740530-21latency_hist11:10:000
169930299511,3cyclictest1719527-21diskstats09:05:170
1699305995036,10cyclictest0-21swapper/208:40:002
1699302995019,27cyclictest0-21swapper/011:00:270
169930299501,8cyclictest1741212-21/usr/sbin/munin11:10:280
1699303994941,4cyclictest1702939-21munin-plugin-st07:30:011
1699302994910,32cyclictest0-21swapper/008:50:280
1699305994831,12cyclictest0-21swapper/208:45:012
169930299481,6cyclictest1726647-21tail09:45:250
169930299481,5cyclictest1749456-21sshd12:00:220
1699305994740,4cyclictest1703780-21munin-plugin-st07:35:002
169930299473,4cyclictest1709499-21/usr/sbin/munin08:05:260
169930299473,4cyclictest1709499-21/usr/sbin/munin08:05:260
1699305994629,9cyclictest1283-21cron07:50:002
1699305994624,16cyclictest311ktimers/209:20:132
1699303994619,4cyclictest22-21rcuc/107:10:251
1699303994619,4cyclictest22-21rcuc/107:10:251
169930599457,19cyclictest0-21swapper/207:15:012
169930599457,19cyclictest0-21swapper/207:15:012
1699305994535,6cyclictest1750568-21grep12:05:282
1699305994531,10cyclictest0-21swapper/210:20:282
1699303994536,6cyclictest1737905-21cron10:55:001
1699303994536,4cyclictest0-21swapper/109:25:011
1699303994535,6cyclictest1749719-21grep12:00:271
1699305994435,6cyclictest0-21swapper/208:55:302
1699305994430,7cyclictest0-21swapper/207:55:312
1699305994428,11cyclictest311ktimers/210:40:102
1699305994426,9cyclictest0-21swapper/208:30:012
1699303994429,10cyclictest0-21swapper/112:30:201
1699305994334,5cyclictest1705569-21apt-key07:45:002
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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