/proc/$pid/maps performance regression
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Fix Released
|
Medium
|
Tim Gardner | ||
Trusty |
Triaged
|
Medium
|
Unassigned | ||
Vivid |
Fix Released
|
Undecided
|
Unassigned | ||
Wily |
Fix Released
|
Undecided
|
Tim Gardner | ||
Xenial |
Fix Released
|
Medium
|
Tim Gardner |
Bug Description
/proc/$pid/maps experienced a significant performance regression for processes with large numbers of threads between Precise and Trusty due to an upstream bug. This behavior is currently blocking my ability to upgrade to Trusty, as we depend on applications with with 10s of thousands of threads.
The issue has been fixed in the 4.5 release.
Upstream report: http://
Upstream patches: https:/
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-
ProcVersionSign
Uname: Linux 3.13.0-36-generic x86_64
AlsaDevices:
total 0
crw-rw---- 1 root audio 116, 1 Feb 18 12:13 seq
crw-rw---- 1 root audio 116, 33 Feb 18 12:13 timer
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
ApportVersion: 2.14.1-0ubuntu3.19
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
Date: Thu Feb 18 13:44:23 2016
MachineType: Supermicro A1SAi
PciMultimedia:
ProcEnviron:
TERM=screen
PATH=(custom, no user)
XDG_RUNTIME_
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcFB: 0 astdrmfb
ProcKernelCmdLine: root=/dev/md1 ro console=tty0 console=ttyS0,57600
RelatedPackageV
linux-
linux-
linux-firmware 1.127.20
RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
SourcePackage: linux
UpgradeStatus: Upgraded to trusty on 2014-07-18 (579 days ago)
WifiSyslog:
dmi.bios.date: 02/27/2014
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1.0c
dmi.board.
dmi.board.name: A1SAi
dmi.board.vendor: Supermicro
dmi.board.version: 123456789
dmi.chassis.
dmi.chassis.type: 18
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.
dmi.modalias: dmi:bvnAmerican
dmi.product.name: A1SAi
dmi.product.
dmi.sys.vendor: Supermicro
Changed in linux (Ubuntu): | |
importance: | Undecided → Medium |
Changed in linux (Ubuntu Trusty): | |
status: | New → Confirmed |
importance: | Undecided → Medium |
tags: | added: cherry-pick kernel-fixed-upstream |
Changed in linux (Ubuntu Trusty): | |
status: | Confirmed → Triaged |
Changed in linux (Ubuntu): | |
status: | Confirmed → Triaged |
Changed in linux (Ubuntu Xenial): | |
assignee: | nobody → Tim Gardner (timg-tpi) |
status: | Triaged → Fix Committed |
Changed in linux (Ubuntu Wily): | |
assignee: | nobody → Tim Gardner (timg-tpi) |
status: | New → In Progress |
Changed in linux (Ubuntu Wily): | |
status: | In Progress → Fix Committed |
Changed in linux (Ubuntu Vivid): | |
status: | New → Fix Committed |
description: | updated |
This change was made by a bot.