You are here: Home / Projects / OSADL QA Farm Real-time / Latency plots / 
2023-01-31 - 05:39

OSADL QA Farm on Real-time of Mainline Linux

About - Hardware - CPUs - Benchmarks - Graphics - Benchmarks - Kernels - Boards/Distros - Latency monitoring - Latency plots - System data - Profiles - Compare - Awards

Default latency plot of shadow in rack #b, 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 
Special  All - All RT - Optimization - Ethernet - Thumbnails - Next
  TQ-Systems

x86 Intel Atom E3825 @1333 MHz, Linux 4.19.37-rt20 (Profile)

Latency plot of shadow in rack #b, slot #6
Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Command line: cyclictest -l100000000 -m -Sp99 -i200 -h400 -q
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 rackbslot6s.osadl.org (updated Tue Jan 31, 2023 00:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3272591980,33ptp4l241ktimersoftd/102:09:161
3272591950,1ptp4l241ktimersoftd/105:42:301
3272591930,12ptp4l241ktimersoftd/107:05:371
3272591920,11ptp4l241ktimersoftd/105:01:201
207202910,8sleep11203799cyclictest04:39:421
3272591860,2ptp4l241ktimersoftd/103:15:431
3272591860,2ptp4l241ktimersoftd/103:06:111
28242860,8sleep01203699cyclictest03:03:510
3272591840,1ptp4l241ktimersoftd/105:20:441
3272591840,13ptp4l241ktimersoftd/106:09:331
3272591830,1ptp4l241ktimersoftd/104:53:421
3272591820,2ptp4l241ktimersoftd/105:14:231
3272591780,1ptp4l241ktimersoftd/106:22:521
438291770,9getstats1203799cyclictest07:10:091
3272591770,1ptp4l241ktimersoftd/102:52:351
12036997716,16cyclictest18843-21taskset06:43:490
3272591760,1ptp4l241ktimersoftd/106:03:491
3272591760,1ptp4l241ktimersoftd/106:03:491
3272591760,1ptp4l241ktimersoftd/103:11:331
12036997622,16cyclictest944-21ssh06:19:450
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

Valid XHTML 1.0 Transitional