Hi,
Could you share the microbenchmark you are using ?
I'd like to test the series on powerpc.
Thanks
Christophe
Le 22/03/2019 à 15:30, Waiman Long a écrit :
Modify __down_read_trylock() to optimize for an unlocked rwsem and make
it generate slightly better code.
Before this patch, down_read
On 03/22/2019 01:25 PM, Russell King - ARM Linux admin wrote:
> On Fri, Mar 22, 2019 at 10:30:08AM -0400, Waiman Long wrote:
>> Modify __down_read_trylock() to optimize for an unlocked rwsem and make
>> it generate slightly better code.
>>
>> Before this patch, down_read_trylock:
>>
>>0x000
On Fri, Mar 22, 2019 at 10:30:08AM -0400, Waiman Long wrote:
> Modify __down_read_trylock() to optimize for an unlocked rwsem and make
> it generate slightly better code.
>
> Before this patch, down_read_trylock:
>
>0x <+0>: callq 0x5
>0x0005 <+5>: jm
On Fri, Mar 22, 2019 at 7:30 AM Waiman Long wrote:
>
> Modify __down_read_trylock() to optimize for an unlocked rwsem and make
> it generate slightly better code.
Oh, that should teach me to read all patches in the series before
starting to comment on them.
So ignore my comment on #1.
Modify __down_read_trylock() to optimize for an unlocked rwsem and make
it generate slightly better code.
Before this patch, down_read_trylock:
0x <+0>: callq 0x5
0x0005 <+5>: jmp0x18
0x0007 <+7>: lea0x1(%rdx),%rcx
0x0
