You are here: Home / Projects / QA Farm Realtime / Latency plots / 
2019-07-17 - 00:31

Intel(R) Xeon(R) CPU E31220L @ 2.20GHz, Linux 3.18.43-rt46-fulldebug (Profile)

Latency plot of system in rack #b, slot #0
Note that this system runs a non-optimized debug kernel.
Data to construct the above plot have been generated using the RT test utility cyclictest.
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: ondemand
The worst-case latency is NOT higher under graphics load.
Results of all systems with accelerated graphics are combined on this summary graph.
Characteristics of the 20 highest latencies:
System rackbslot0.osadl.org (updated Tue Jul 16, 2019 12:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
297819952633622,890cyclictest24475-21rm09:10:400
297939951269,4335cyclictest1-21systemd10:46:521
298019942612061,1458cyclictest1026550wget09:18:502
297939941593344,783cyclictest304572sshd10:05:221
29801993930134,3013cyclictest13266-21latency_hist12:08:312
2980199373759,2932cyclictest121250ntpd11:03:502
298129937123684,23cyclictest0-21swapper/308:15:053
29793993702119,2812cyclictest172950nfsd09:08:411
298019935763543,28cyclictest0-21swapper/208:15:052
297819935101,7cyclictest304572sshd10:05:220
298019933812,2433cyclictest129250irq/25-em108:07:282
298019933633331,28cyclictest27-21rcuc/210:05:222
297939933492536,28cyclictest1727-21nfsd10:11:531
298019933442,2402cyclictest129250irq/25-em107:53:012
298129932833270,8cyclictest0-21swapper/310:05:223
298129932092,2276cyclictest361ktimersoftd/307:48:263
298129932092,2276cyclictest361ktimersoftd/307:48:263
297819931801,2302cyclictest41ktimersoftd/008:36:360
298019931321433,1141cyclictest1006050ntpq10:28:532
298019931191,2239cyclictest129250irq/25-em107:33:472
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

Valid XHTML 1.0 Transitional