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2024-02-29 - 18:50

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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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 20 highest latencies:
System rackeslot6s.osadl.org (updated Thu Feb 29, 2024 12:45:05)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3637019991132,6cyclictest131rcu_preempt10:15:010
363701999982,20cyclictest131rcu_preempt07:10:020
3637019998935,49cyclictest16950irq/224-800000009:50:320
363701999862,9cyclictest3686697-21df_inode11:55:300
3637019998580,3cyclictest14850irq/28-2000000011:20:010
363701999832,8cyclictest3682456-21/usr/sbin/munin11:30:300
363701999832,12cyclictest3648047-21df_inode08:10:270
363701999832,12cyclictest3648047-21df_inode08:10:270
3637019998229,50cyclictest16950irq/224-800000012:30:290
3637019998224,54cyclictest3663268-21/usr/sbin/munin09:35:380
363701999812,5cyclictest3663790-21irqstats09:40:330
363701999802,7cyclictest3652541-21memory08:35:350
363701999801,75cyclictest3642036-21memory07:35:360
363701999782,5cyclictest3641148-21irqstats07:30:360
3637019997730,42cyclictest16950irq/224-800000009:20:380
363701999772,6cyclictest3678631-21users11:05:400
363701999772,6cyclictest3670673-21/usr/sbin/munin10:20:360
363701999772,6cyclictest3670673-21/usr/sbin/munin10:20:360
363701999771,14cyclictest3683728-21/usr/sbin/munin11:35:360
3637019997623,48cyclictest14850irq/28-2000000010:00:340
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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