Re: Performance issues with /gnu/store in virtual machines

2017-08-22 Thread Ludovic Courtès
Christopher Baines skribis: > On Tue, 22 Aug 2017 12:11:43 +0200 > l...@gnu.org (Ludovic Courtès) wrote: > >> Hi Chris, >> >> Christopher Baines skribis: >> >> > 1.130.19 0 3853 openat >> >> [...] >> >> > 13.560.193014 50 3853

Re: Performance issues with /gnu/store in virtual machines

2017-08-22 Thread Ludovic Courtès
iyzs...@member.fsf.org (宋文武) skribis: > l...@gnu.org (Ludovic Courtès) writes: > >> Hi Chris, >> >> Christopher Baines skribis: >> >>> 1.130.19 0 3853 openat >> >> [...] >> >>> 13.560.193014 50 3853 openat >> >> So openat(2) is 4 ord

Re: Performance issues with /gnu/store in virtual machines

2017-08-22 Thread 宋文武
l...@gnu.org (Ludovic Courtès) writes: > Hi Chris, > > Christopher Baines skribis: > >> 1.130.19 0 3853 openat > > [...] > >> 13.560.193014 50 3853 openat > > So openat(2) is 4 orders of magnitude slower in the VM, which is a > probl

Re: Performance issues with /gnu/store in virtual machines

2017-08-22 Thread Christopher Baines
On Tue, 22 Aug 2017 12:11:43 +0200 l...@gnu.org (Ludovic Courtès) wrote: > Hi Chris, > > Christopher Baines skribis: > > > 1.130.19 0 3853 openat > > [...] > > > 13.560.193014 50 3853 openat > > So openat(2) is 4 orders of m

Re: Performance issues with /gnu/store in virtual machines

2017-08-22 Thread Ludovic Courtès
Hi Chris, Christopher Baines skribis: > 1.130.19 0 3853 openat [...] > 13.560.193014 50 3853 openat So openat(2) is 4 orders of magnitude slower in the VM, which is a problem. I guess a large part of that is due to the fact that

Re: Performance issues with /gnu/store in virtual machines

2017-08-20 Thread Christopher Baines
On Sun, 20 Aug 2017 11:02:16 +0200 Ricardo Wurmus wrote: > Hi Chris, > > > So I was trying out using VMs created through Guix for more things, > > particularly as they can be run as part of derivations, e.g. the > > system tests for Guix. > > > > However, I'm seeing anything that does I/O perfor

Re: Performance issues with /gnu/store in virtual machines

2017-08-20 Thread Ricardo Wurmus
Hi Chris, > So I was trying out using VMs created through Guix for more things, > particularly as they can be run as part of derivations, e.g. the system > tests for Guix. > > However, I'm seeing anything that does I/O performing very poorly > compared with the host system. (I’m not using VMs as

Performance issues with /gnu/store in virtual machines

2017-08-17 Thread Christopher Baines
Hey, So I was trying out using VMs created through Guix for more things, particularly as they can be run as part of derivations, e.g. the system tests for Guix. However, I'm seeing anything that does I/O performing very poorly compared with the host system. See the system call profiles from strac