touch-packages team mailing list archive

[Łukasz Zemczak <1496051@xxxxxxxxxxxxxxxxxx>]

I suppose we might consider discussing changing the default
vm.swappiness value to something smaller, but I guess someone would have
to do some testing and comparison so we have actual numbers on how it
affects system performance. Not sure if I would consider it a hotfix for
OTA-8.5 though, not enough research done on this.

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https://bugs.launchpad.net/bugs/1496051

Title:
   kswapd pegging cpu

Status in Canonical System Image:
  Incomplete
Status in lxc-android-config package in Ubuntu:
  Confirmed

Bug description:
  while debugging bug 1491566
  On arale, rc-proposed circa sept 14
  I had launched phone, messaging, browser (on cnn.com), camera (taken pics), gallery (edit mode of pic), clock, ubuntu-system-settings, cut-the-rope, dash (of course) - toggling between them in the spread, just selecting them, mostly clock, browser, gallery
  and at the same time running the phone/text script as found in bug 1491566 (modified to text, call, then text 5 times)

  I just happened to be running top and then noticed process
  kswapd
  would run & peg cpu intermittently, sometimes it would peg the cpu for just 1 second or so, but then sometimes it would appear to run at 95%+ for like 10 seconds or more.
  It didn't seem to follow a particular pattern, but i could definitely tell it was effecting the ui (stalling)

  ogra indicated our swappiness should be very low.
  so i did sudo sysctl vm.swappiness=10 as instructed, however as i continued testing, i continued to see kswapd continue to run and peg the cpu at about the same frequency.

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