I am running qemu-kvm version 1.0
($kvm -version
QEMU emulator version 1.0 (qemu-kvm-1.0), Copyright (c) 2003-2008 Fabrice Bellard)
When I start a VM with 4 vcpus, I see about 8 threads. (the thread count varies ...)
1118 1118 ? 00:00:00 kvm-irqfd-clean
8767 8767 pts/4 00:03:16 kvm
8767 8770 pts/4 1-15:10:10 kvm
8767 8771 pts/4 1-14:40:42 kvm
8767 8772 pts/4 2-04:39:57 kvm
8767 8773 pts/4 08:35:51 kvm
8767 28585 pts/4 00:00:00 kvm
8767 28597 pts/4 00:00:00 kvm
8767 28598 pts/4 00:00:00 kvm
8767 28599 pts/4 00:00:00 kvm
8767 28600 pts/4 00:00:00 kvm
8768 8768 ? 00:00:00 kvm-pit/8767
On older version of qemu (prior to the qemu/kvm binary merge), I typically
saw 5 threads (for 4 vcpu) - which I believe was 1 x 4 for each vcpu and 1 for
the IO threads.
In the current system, what are the extra threads?
Secondly, I am currently not using libvirt and having to start qemu from
command line. I still want to pin the vcpu to a pcpu and want to use
taskset on a thread. Unless I know which thread is emulating the vcpu
how can I pin that thread?
Do you have any other thoughts on the pinning part?
Any guidance/pointers?
Thank You.