Re: [Xen-devel] [PATCH RFC v2 0/4] HVM x86 deprivileged mode operations

2015-09-08 Thread Ben Catterall
Hi Fabio, On 04/09/15 11:46, Fabio Fantoni wrote: [snip] Sorry for my stupid questions: Is there a test with benchmark using qemu instead for know how is different? Qemu seems that emulate also some istructions cases that xen hypervisor doesn't for now, or I'm wrong? So, QEMU emulates devices

Re: [Xen-devel] [PATCH RFC v2 0/4] HVM x86 deprivileged mode operations

2015-09-07 Thread Ben Catterall
On 03/09/15 17:15, David Vrabel wrote: On 03/09/15 17:01, Ben Catterall wrote: Intel Intel 2.2GHz Xeon E5-2407 0 processor: 1.55e-06 seconds was the average time for performing the write without the deprivileged code running. 5.75e-06 se

Re: [Xen-devel] [PATCH RFC v2 0/4] HVM x86 deprivileged mode operations

2015-09-04 Thread Fabio Fantoni
Il 03/09/2015 18:01, Ben Catterall ha scritto: Hi all, I have made requested changes and reworked the patch series based on the comments recieved. Thank you to all of the contributors to those discussions! The next step will be to provide an example of usage of this system which will follow in a

Re: [Xen-devel] [PATCH RFC v2 0/4] HVM x86 deprivileged mode operations

2015-09-04 Thread Jan Beulich
>>> On 04.09.15 at 11:16, wrote: > On Fri, 2015-09-04 at 02:33 -0600, Jan Beulich wrote: >> > >> > > > On 03.09.15 at 18:01, wrote: >> > I performed 10 writes to a single I/O port on an Intel 2.2GHz Xeon >> > E5-2407 0 processor and an AMD Opteron 2376. This was done from a >> > python >>

Re: [Xen-devel] [PATCH RFC v2 0/4] HVM x86 deprivileged mode operations

2015-09-04 Thread Ian Campbell
On Fri, 2015-09-04 at 02:33 -0600, Jan Beulich wrote: > > > > > > On 03.09.15 at 18:01, wrote: > > I performed 10 writes to a single I/O port on an Intel 2.2GHz Xeon > > E5-2407 0 processor and an AMD Opteron 2376. This was done from a > > python > > script > > within the HVM guest using ti

Re: [Xen-devel] [PATCH RFC v2 0/4] HVM x86 deprivileged mode operations

2015-09-04 Thread Jan Beulich
>>> On 03.09.15 at 18:01, wrote: > I performed 10 writes to a single I/O port on an Intel 2.2GHz Xeon > E5-2407 0 processor and an AMD Opteron 2376. This was done from a python > script > within the HVM guest using time.time() and running Debian Jessie. Each write > was > trapped to cause a

Re: [Xen-devel] [PATCH RFC v2 0/4] HVM x86 deprivileged mode operations

2015-09-03 Thread David Vrabel
On 03/09/15 17:01, Ben Catterall wrote: > > Intel Intel 2.2GHz Xeon E5-2407 0 processor: > > 1.55e-06 seconds was the average time for performing the write without the > deprivileged code running. > > 5.75e-06 seconds was the average time for

[Xen-devel] [PATCH RFC v2 0/4] HVM x86 deprivileged mode operations

2015-09-03 Thread Ben Catterall
Hi all, I have made requested changes and reworked the patch series based on the comments recieved. Thank you to all of the contributors to those discussions! The next step will be to provide an example of usage of this system which will follow in another patch. The main changes from v1 are: - N