On Wed, Apr 03, 2013 at 11:52:19AM +0300, Michael S. Tsirkin wrote:
> These patches add ability to measure speed of MMIO versus PIO, in
> different configurations. As I didn't want to reserve a hardcoded range
> of memory, I added pci bus scan support instead. Used together with the
> new pci-testdev backend. When not present, the new tests are skipped.
>
> Example output:
> mmio-no-eventfd:pci-mem 8796
> mmio-wildcard-eventfd:pci-mem 3609
> mmio-datamatch-eventfd:pci-mem 3685
> portio-no-eventfd:pci-io 5287
> portio-wildcard-eventfd:pci-io 1762
> portio-datamatch-eventfd:pci-io 1777
>
> First interesting conclusion is that the overhead of MMIO
> exit to QEMU as compared to PIO is double that of
> MMIO ioeventfd as compared to PIO eventfd. Is this a known fact?
>
Looks fine to me. Will apply when QEMU part will land in upstream.
> Michael S. Tsirkin (5):
> kvm-unittest: add printf %c support
> kvm-unittest: libcflat: add offsetof
> libcflat.h: define NULL
> lib: add pci bus scan support
> vmexit: add pci io and memory speed tests
>
> config-x86-common.mak | 1 +
> lib/libcflat.h | 3 +
> lib/printf.c | 3 +
> lib/x86/pci.c | 55 ++++++++++++
> lib/x86/pci.h | 16 ++++
> x86-run | 13 ++-
> x86/vmexit.c | 226
> +++++++++++++++++++++++++++++++++++++++++++++++---
> 7 files changed, 302 insertions(+), 15 deletions(-)
> create mode 100644 lib/x86/pci.c
> create mode 100644 lib/x86/pci.h
>
> --
> MST
--
Gleb.
--
To unsubscribe from this list: send the line "unsubscribe kvm" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
