Ubuntu
linux package

  1. Bug #1107150
  2. Comment #35

Comment 35 for bug 1107150

Revision history for this message
Mark Vels (mark-vels) wrote : Re: B75 Chipset I/O Problems

mmm no improvement :-(

me@vbox-ubuntu-1210-i386:~$ uname -a
Linux vbox-ubuntu-1210-i386 3.9.0-030900rc4-generic #201303232035 SMP Sun Mar 24 00:44:55 UTC 2013 i686 i686 i686 GNU/Linux
me@vbox-ubuntu-1210-i386:~$ time sudo apt-get update

16GByte
    real 17m36.608s
    user 0m15.096s
    sys 0m11.608s

12GByte
    real 0m10.705s
    user 0m1.748s
    sys 0m0.428s

I have ran strace as 'sudo strace apt-get update' and it shows that the slow-down is really due to abdominal bad kernel I/O performance. Alsmost all the time is actually spend while blocking on the read() system call (which is not much of a surprise I guess if we're already looking at kernel versions.. ) Just wanted to do the exercise anyway..

What's the next step? Going backwards indeed to find out when it was introduced?
Is the VirtualBox VM settings "Extended features: Enable PAE/ NX" relevant?

I'm more of an embedded dev so not too familiar with x86 hw