Re: [PATCH] KVM: PPC: BOOK3S: book3s_hv_nested.c: improve branch prediction for k.alloc

On 2023-04-12 12:34:13, Kautuk Consul wrote: > Hi, > > On 2023-04-11 16:35:10, Michael Ellerman wrote: > > Kautuk Consul writes: > > > On 2023-04-07 09:01:29, Sean Christopherson wrote: > > >> On Fri, Apr 07, 2023, Bagas Sanjaya wrote: > > >> > On Fri, Apr 07, 2023 at 05:31:47AM -0400, Kautuk

Re: [PATCH] KVM: PPC: BOOK3S: book3s_hv_nested.c: improve branch prediction for k.alloc

Hi, On 2023-04-11 16:35:10, Michael Ellerman wrote: > Kautuk Consul writes: > > On 2023-04-07 09:01:29, Sean Christopherson wrote: > >> On Fri, Apr 07, 2023, Bagas Sanjaya wrote: > >> > On Fri, Apr 07, 2023 at 05:31:47AM -0400, Kautuk Consul wrote: > >> > > I used the unlikely() macro on the

Re: [PATCH] KVM: PPC: BOOK3S: book3s_hv_nested.c: improve branch prediction for k.alloc

Kautuk Consul writes: > On 2023-04-07 09:01:29, Sean Christopherson wrote: >> On Fri, Apr 07, 2023, Bagas Sanjaya wrote: >> > On Fri, Apr 07, 2023 at 05:31:47AM -0400, Kautuk Consul wrote: >> > > I used the unlikely() macro on the return values of the k.alloc >> > > calls and found that it

Re: [PATCH] KVM: PPC: BOOK3S: book3s_hv_nested.c: improve branch prediction for k.alloc

On 2023-04-07 09:01:29, Sean Christopherson wrote: > On Fri, Apr 07, 2023, Bagas Sanjaya wrote: > > On Fri, Apr 07, 2023 at 05:31:47AM -0400, Kautuk Consul wrote: > > > I used the unlikely() macro on the return values of the k.alloc > > > calls and found that it changes the code generation a bit.

Re: [PATCH] KVM: PPC: BOOK3S: book3s_hv_nested.c: improve branch prediction for k.alloc

On Fri, Apr 07, 2023, Bagas Sanjaya wrote: > On Fri, Apr 07, 2023 at 05:31:47AM -0400, Kautuk Consul wrote: > > I used the unlikely() macro on the return values of the k.alloc > > calls and found that it changes the code generation a bit. > > Optimize all return paths of k.alloc calls by improving

Re: [PATCH] KVM: PPC: BOOK3S: book3s_hv_nested.c: improve branch prediction for k.alloc

On Fri, Apr 07, 2023 at 05:31:47AM -0400, Kautuk Consul wrote: > I used the unlikely() macro on the return values of the k.alloc > calls and found that it changes the code generation a bit. > Optimize all return paths of k.alloc calls by improving > branch prediction on return value of k.alloc.

[PATCH] KVM: PPC: BOOK3S: book3s_hv_nested.c: improve branch prediction for k.alloc

I used the unlikely() macro on the return values of the k.alloc calls and found that it changes the code generation a bit. Optimize all return paths of k.alloc calls by improving branch prediction on return value of k.alloc. Signed-off-by: Kautuk Consul --- arch/powerpc/kvm/book3s_hv_nested.c |