On 02/16/2018 10:08 AM, Viktor Mihajlovski wrote:
From: Luiz Capitulino <lcapitul...@redhat.com>The query-cpus command has an extremely serious side effect: it always interrupts all running vCPUs so that they can run ioctl calls. This can cause a huge performance degradation for some workloads. And most of the information retrieved by the ioctl calls are not even used by query-cpus. This commit introduces a replacement for query-cpus called query-cpus-fast, which has the following features: o Never interrupt vCPUs threads. query-cpus-fast only returns vCPU information maintained by QEMU itself, which should be sufficient for most management software needs o Drop "halted" field as it can not be retrieved in a fast way on most architectures o Drop irrelevant fields such as "current", "pc" and "arch" o Rename some fields for better clarification & proper naming standard Signed-off-by: Luiz Capitulino <lcapitul...@redhat.com> Signed-off-by: Viktor Mihajlovski <mihaj...@linux.vnet.ibm.com> --- cpus.c | 38 ++++++++++++++++++++++++++++++ qapi-schema.json | 70 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 108 insertions(+)
Reviewed-by: Eric Blake <ebl...@redhat.com> -- Eric Blake, Principal Software Engineer Red Hat, Inc. +1-919-301-3266 Virtualization: qemu.org | libvirt.org
