Bug#843349: linux-image-4.7.0-1-amd64: Intermittently high system load, sluggish response, no /proc//stat utime,stime,etc. reported

2017-01-26 Thread Tom Lee
Alrighty, having read through the other responses I'm inclined to agree something's not playing nice with certain hardware: I think that the difference is more likely to be in the configuration, > rather than the patches we apply. > > As in the kernel config? I guess that's possible. I think I

Bug#843349: linux-image-4.7.0-1-amd64: Intermittently high system load, sluggish response, no /proc//stat utime,stime,etc. reported

2017-01-26 Thread Tom Lee
Oops, somehow missed those follow-ups. Thanks, I'll catch up. Have you tried booting one of the newer kernel versions from power-off? I'll be sure to give that a go, thanks. On Thu, Jan 26, 2017 at 5:54 PM, Ben Hutchings wrote: > On Wed, 2017-01-25 at 17:52 -0800, Tom

Bug#843349: linux-image-4.7.0-1-amd64: Intermittently high system load, sluggish response, no /proc//stat utime,stime,etc. reported

2017-01-26 Thread Ben Hutchings
On Wed, 2017-01-25 at 17:52 -0800, Tom Lee wrote: > Just an update: I am still encountering similar performance issues with the > 4.9.0-1 kernel that was recently promoted to testing. In fact, the 4.9.0-1 > kernel may be the worst yet in terms of this specific issue, with IntelliJ > starting so

Bug#843349: linux-image-4.7.0-1-amd64: Intermittently high system load, sluggish response, no /proc//stat utime,stime,etc. reported

2017-01-25 Thread Tom Lee
Just an update: I am still encountering similar performance issues with the 4.9.0-1 kernel that was recently promoted to testing. In fact, the 4.9.0-1 kernel may be the worst yet in terms of this specific issue, with IntelliJ starting so slowly as to be effectively unusable. One time the entire

Bug#843349: linux-image-4.7.0-1-amd64: Intermittently high system load, sluggish response, no /proc//stat utime,stime,etc. reported

2016-11-20 Thread Tom Lee
Also potentially relevant: kworker/0:0 has 421h on-cpu time reported per htop (the TIME+ column) and top. /proc//stat output for PID=4 (kworker/0:0) vs PID=63 (kworker/1:1): tom@desktop ~ $ cat /proc/63/stat 63 (kworker/1:1) S 2 0 0 0 -1 69238880 0 0 0 0 0 0 0 0 20 0 1 0 82 0 0

Bug#843349: linux-image-4.7.0-1-amd64: Intermittently high system load, sluggish response, no /proc//stat utime,stime,etc. reported

2016-11-20 Thread Tom Lee
Tried 4.8.0-1 with similar results. Perhaps slightly better, but not much. $ uname -a Linux desktop 4.8.0-1-amd64 #1 SMP Debian 4.8.5-1 (2016-10-28) x86_64 GNU/Linux Like 4.7, can't see what's hogging the CPUs as per-process CPU stats don't appear to be correctly reported in /proc//stat. 4.6.x

Bug#843349: linux-image-4.7.0-1-amd64: Intermittently high system load, sluggish response, no /proc//stat utime,stime,etc. reported

2016-11-18 Thread Christophe Aguettaz
On Sun, 13 Nov 2016 04:23:54 + Ben Hutchings wrote: > Control: tag -1 moreinfo > > On Sun, 2016-11-06 at 00:02 -0700, Tom Lee wrote: > [...] > > Downgrading to linux-image-4.6.0-1-amd64 fixed all symptoms. Haven't yet > > tried 4.8.0-1 from unstable, not sure if it's

Bug#843349: linux-image-4.7.0-1-amd64: Intermittently high system load, sluggish response, no /proc//stat utime,stime,etc. reported

2016-11-12 Thread Ben Hutchings
Control: tag -1 moreinfo On Sun, 2016-11-06 at 00:02 -0700, Tom Lee wrote: [...] > Downgrading to linux-image-4.6.0-1-amd64 fixed all symptoms. Haven't yet > tried 4.8.0-1 from unstable, not sure if it's impacted. [...] Please do. Ben. -- Ben Hutchings Nothing is ever a complete failure; it

Bug#843349: linux-image-4.7.0-1-amd64: Intermittently high system load, sluggish response, no /proc//stat utime,stime,etc. reported

2016-11-06 Thread Tom Lee
Package: src:linux Version: 4.7.8-1 Severity: important Dear Maintainer, Experienced poor system-wide performance since linux-image-amd64 pulled down 4.7.0-1. Tried to investigate what was going on, only to discover that tools like top/htop were unable to report per-process CPU time (though