Re: [PATCH] Revert "locking/pvqspinlock: Don't wait if vCPU is preempted"

2019-09-24 Thread Wanpeng Li
On Wed, 11 Sep 2019 at 21:04, Paolo Bonzini wrote: > > On 11/09/19 06:25, Waiman Long wrote: > > On 9/10/19 6:56 AM, Wanpeng Li wrote: > >> On Mon, 9 Sep 2019 at 18:56, Waiman Long wrote: > >>> On 9/9/19 2:40 AM, Wanpeng Li wrote: > From: Wanpeng Li > > This patch reverts commit 7

Re: [PATCH] Revert "locking/pvqspinlock: Don't wait if vCPU is preempted"

2019-09-11 Thread Paolo Bonzini
On 11/09/19 06:25, Waiman Long wrote: > On 9/10/19 6:56 AM, Wanpeng Li wrote: >> On Mon, 9 Sep 2019 at 18:56, Waiman Long wrote: >>> On 9/9/19 2:40 AM, Wanpeng Li wrote: From: Wanpeng Li This patch reverts commit 75437bb304b20 (locking/pvqspinlock: Don't wait if vCPU is preemp

Re: [PATCH] Revert "locking/pvqspinlock: Don't wait if vCPU is preempted"

2019-09-10 Thread Waiman Long
On 9/10/19 6:56 AM, Wanpeng Li wrote: > On Mon, 9 Sep 2019 at 18:56, Waiman Long wrote: >> On 9/9/19 2:40 AM, Wanpeng Li wrote: >>> From: Wanpeng Li >>> >>> This patch reverts commit 75437bb304b20 (locking/pvqspinlock: Don't wait if >>> vCPU is preempted), we found great regression caused by this

Re: [PATCH] Revert "locking/pvqspinlock: Don't wait if vCPU is preempted"

2019-09-09 Thread Wanpeng Li
On Mon, 9 Sep 2019 at 18:56, Waiman Long wrote: > > On 9/9/19 2:40 AM, Wanpeng Li wrote: > > From: Wanpeng Li > > > > This patch reverts commit 75437bb304b20 (locking/pvqspinlock: Don't wait if > > vCPU is preempted), we found great regression caused by this commit. > > > > Xeon Skylake box, 2 so

Re: [PATCH] Revert "locking/pvqspinlock: Don't wait if vCPU is preempted"

2019-09-09 Thread Wanpeng Li
On Mon, 9 Sep 2019 at 19:06, Paolo Bonzini wrote: > > On 09/09/19 12:56, Waiman Long wrote: > > On 9/9/19 2:40 AM, Wanpeng Li wrote: > >> From: Wanpeng Li > >> > >> This patch reverts commit 75437bb304b20 (locking/pvqspinlock: Don't wait if > >> vCPU is preempted), we found great regression cause

Re: [PATCH] Revert "locking/pvqspinlock: Don't wait if vCPU is preempted"

2019-09-09 Thread Paolo Bonzini
On 09/09/19 12:56, Waiman Long wrote: > On 9/9/19 2:40 AM, Wanpeng Li wrote: >> From: Wanpeng Li >> >> This patch reverts commit 75437bb304b20 (locking/pvqspinlock: Don't wait if >> vCPU is preempted), we found great regression caused by this commit. >> >> Xeon Skylake box, 2 sockets, 40 cores, 8

Re: [PATCH] Revert "locking/pvqspinlock: Don't wait if vCPU is preempted"

2019-09-09 Thread Waiman Long
On 9/9/19 2:40 AM, Wanpeng Li wrote: > From: Wanpeng Li > > This patch reverts commit 75437bb304b20 (locking/pvqspinlock: Don't wait if > vCPU is preempted), we found great regression caused by this commit. > > Xeon Skylake box, 2 sockets, 40 cores, 80 threads, three VMs, each is 80 > vCPUs. > T

[PATCH] Revert "locking/pvqspinlock: Don't wait if vCPU is preempted"

2019-09-08 Thread Wanpeng Li
From: Wanpeng Li This patch reverts commit 75437bb304b20 (locking/pvqspinlock: Don't wait if vCPU is preempted), we found great regression caused by this commit. Xeon Skylake box, 2 sockets, 40 cores, 80 threads, three VMs, each is 80 vCPUs. The score of ebizzy -M can reduce from 13000-14000 re