Fake number of CPUs

LXD
1

Would it be possible to create imaginary high number to CPUs (lets say 4X the hardware CPUs) so that my parallel programs are faster?
Thanks.

2

It’s not something we’re likely to allow in LXD/LXCFS as it’d contain invalid cpu ids that’d then fail when processes attempt to pin on those.

But if your problem is some buggy piece of software which looks at /proc/cpuinfo and then spawns a thread per CPU, you could just do something like:

  • cat /proc/cpuinfo > /root/my-cpuinfo
  • vim /root/my-cpuinfo
  • mount --bind /root/my-cpuinfo /proc/cpuinfo

Which would let you put whatever you want in there.