[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Old Index]
NetBSD/Xen samba performance low (compared to NetBSD/amd64)
on a small Intel NUC with Realtek network chip I want to operate
a Xen host. My NetBSD Xen guests are supposed to host different web apps
as well as an Asterisk PBX.
I also want to provide network drives via Samba as performant as
possible. To keep the overhead of hard drive access low I thought it
could be a good idea to let Samba - although not architecturally clean -
operate from Dom0.
When trying to do this, I noticed a significant difference in network speed.
Constellation 1 (Pure NetBSD kernel):
* NetBSD/amd64 9.0 Kernel + Samba: throughput ~60 MByte/s
Constellation 2 (NetBSD/Xen Domain 0):
* Xen 4.11 + NetBSD/Xen Dom0 + Samba: throughput ~12 MByte/s
I measured this by copying an 8 GB ISO file from a Windows host.
In constellation 2, no guests had started and the full main memory of
Dom0 was assigned. In my view, the only significant difference is that
NetBSD can only use one of the two CPU cores under Xen. Since the CPU
was idle on average at 20% during copying, that doesn't seem to be the
Are such differences in I/O performance to be expected?
Thank you & best regards
Main Index |
Thread Index |