Samuel Thibault, on Mon 08 Feb 2016 19:09:48 +0100, wrote: > Ritesh Raj Sarraf, on Mon 08 Feb 2016 23:33:53 +0530, wrote: > > On Mon, 2016-02-08 at 23:24 +0530, Ritesh Raj Sarraf wrote: > > > In today's upgrade, 2 observations I have that I'd like to share. > > > > > > 1) I'm using the rtl8139 network driver emulated with qemu. I fetched > > > some data (around 200 MiB) over the network from the host (Linux) > > > machine. The network speed I got was average 250 KiB/Sec > > > > And I think part of the reason may be the emulation. Especially for the > > block device, when you do I/O, the CPU usage is persistently 100%. > > That's way too much. On my laptop (nothing fancy, just a Core i5), I > typically get 15MB/s transfers. > > Again, do you really have KVM enabled?
Also, do you use cache=writeback as advised in our documentations? Samuel
