[libvirt] Re: [PATCH 7/6] Only probe qemu for machine types when binary changes

By probing for qemu machine types, we increased the time of a GetCapabilities call from 100us to a whopping 60ms. This patch takes the approach of only probing for machine types when the mtime of the emulator binary changed since the last time the capabilities were generated.

This brings the time of the call back to what it was for the most common case. * src/capabilities.h: cache the emulator binary mtime * src/qemu_conf.c: add qemudGetOldMachines() to copy the machine types from the old caps struct if the mtime for the binary hasn't changed * src/qemu_conf.h, src/qemu_driver.c: pass the old caps pointer to qemudCapsInit() --- src/capabilities.h | 1 + src/qemu_conf.c | 97 ++++++++++++++++++++++++++++++++++++++++++++++++--- src/qemu_conf.h | 2 +- src/qemu_driver.c | 4 +- 4 files changed, 95 insertions(+), 9 deletions(-)