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 majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
