On 04/07/2017 07:24 AM, Nikunj A Dadhania wrote: > Cédric Le Goater <c...@kaod.org> writes: > >> Hello Nikunj, >> >> On 04/06/2017 12:22 PM, Nikunj A Dadhania wrote: >>> The series enables Multi-Threaded TCG on PPC64 >>> >>> Patch 01: Use atomic_cmpxchg in store conditional >>> 02: Handle first write to page during atomic operation >>> 03: Generate memory barriers for sync/isync and load/store conditional >>> >>> Patches are based on ppc-for-2.10 >>> >>> Tested using following: >>> ./ppc64-softmmu/qemu-system-ppc64 -cpu POWER8 -vga none -nographic -machine >>> pseries,usb=off -m 2G -smp 8,cores=8,threads=1 -accel tcg,thread=multi >>> f23.img >> >> I tried it with a Ubuntu 16.04.2 guest using stress --cpu 8. It looked >> good : the CPU usage of QEMU reached 760% on the host. > > Cool. > >>> Todo: >>> * Enable other machine types and PPC32. >> >> I am quite ignorant on the topic. >> Have you looked at what it would take to emulate support of the HW >> threads ? > > We would need to implement msgsndp (doorbell support for IPI between > threads of same core)
ok. I get it. Thanks, >> and the PowerNV machine ? > > Haven't tried it, should work. Just give a shot, let me know if you see > problems. sure. pnv is still on 2.9, so I will rebase on 2.10, merge your patches and tell you. Thanks, C.
