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2025-11-11 - 13:48

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, slot #7

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 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.

Note that this system runs a non-RT kernel.
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 20 highest latencies:
System rackbslot7s.osadl.org (updated Tue Nov 11, 2025 00:43:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
101362801617,7986sleep34406-21kworker/3:121:42:453
3043627436,721sleep030472-21ntpq00:29:450
3043627436,721sleep030472-21ntpq00:29:450
22758272961,652sleep022790-21/usr/sbin/munin20:39:440
22758272961,652sleep022790-21/usr/sbin/munin20:39:440
2109126737,603sleep021129-21ntpq23:59:460
2109126737,603sleep021129-21ntpq23:59:460
32481260719,570sleep232485-21/usr/sbin/munin22:54:412
15763255316,516sleep115765-21sshd20:16:481
15763255316,516sleep115765-21sshd20:16:481
22711247566,398sleep0362-21snmpd00:04:510
20014240234,140sleep020076-21fschecks_time22:14:390
20014240234,140sleep020076-21fschecks_time22:14:390
3055323479,318sleep00-21swapper/022:49:180
2495523329,309sleep124994-21ntpq22:29:461
2495523329,309sleep124994-21ntpq22:29:461
27578231313,285sleep227616-21ntpq20:54:482
26389231156,245sleep0362-21snmpd00:16:010
26389231156,245sleep0362-21snmpd00:16:010
6731229618,260sleep26788-21grep19:49:402
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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