On 11/28/2019 05:31 AM, Michael Ellerman wrote:
Christophe Leroy writes:
Le 22/11/2019 à 07:38, Michael Ellerman a écrit :
Michael Ellerman writes:
Christophe Leroy writes:
__get_datapage() is only a few instructions to retrieve the
address of the page where the kernel stores data to th
Christophe Leroy writes:
> Le 22/11/2019 à 07:38, Michael Ellerman a écrit :
>> Michael Ellerman writes:
>>> Christophe Leroy writes:
__get_datapage() is only a few instructions to retrieve the
address of the page where the kernel stores data to the VDSO.
By inlining this fun
Hi Michael,
Le 22/11/2019 à 07:38, Michael Ellerman a écrit :
Michael Ellerman writes:
Christophe Leroy writes:
__get_datapage() is only a few instructions to retrieve the
address of the page where the kernel stores data to the VDSO.
By inlining this function into its users, a bl/blr pair a
Michael Ellerman writes:
> Christophe Leroy writes:
>> __get_datapage() is only a few instructions to retrieve the
>> address of the page where the kernel stores data to the VDSO.
>>
>> By inlining this function into its users, a bl/blr pair and
>> a mflr/mtlr pair is avoided, plus a few reg move
Christophe Leroy writes:
> __get_datapage() is only a few instructions to retrieve the
> address of the page where the kernel stores data to the VDSO.
>
> By inlining this function into its users, a bl/blr pair and
> a mflr/mtlr pair is avoided, plus a few reg moves.
>
> The improvement is noticea
__get_datapage() is only a few instructions to retrieve the
address of the page where the kernel stores data to the VDSO.
By inlining this function into its users, a bl/blr pair and
a mflr/mtlr pair is avoided, plus a few reg moves.
The improvement is noticeable (about 55 nsec/call on an 8xx)
vd
