extremely slow v4 performance on gigabit link
Subsystems (2)
I have a very slow (less than 1MB/s) performance with nfsv4 TCP, rsize/wsize have no effect, server is a kernel 3.19 x86 100hz no preempt exporting async nfsv4 TCP on nfs-utils 1.2.7, client is a kernel 4.1.3 x64 1000hz full preempt with nfs-utils 1.3.2 , physical link is 1 gigabit full duplex, I mounted a few cifs shares to check, the cifs shares are working at 30 MB/s and higher
is it possible that preempt has an effect on NFS performance ? does timeslice have effect on performance ?
Quoted 1 line · On Wed, Aug 05, 2015 at 07:13:58AM -0400, [email protected] wrote:
I have a very slow (less than 1MB/s) performance with nfsv4 TCP,
How are you measuring this?
Quoted 2 lines
rsize/wsize have no effect, server is a kernel 3.19 x86 100hz no preempt exporting async nfsv4 TCP on nfs-utils 1.2.7,
The "async" export option isn't normally recommended, though it's unlikely to have anything to do with this problem.
Quoted 7 lines
client is a
kernel 4.1.3 x64 1000hz full preempt with nfs-utils 1.3.2 , physical link is 1 gigabit full duplex, I mounted a few cifs shares to check, the cifs shares are working at 30 MB/s and higheris it possible that preempt has an effect on NFS performance ? does timeslice have effect on performance ?
I think those are unlikely to be relevant.
--b.