> On Aug 3, 2020, at 6:56 PM, Arvind Sankar wrote:
>
> On Mon, Aug 03, 2020 at 10:55:01PM +, Nick Terrell wrote:
>>
>>
>>> On Aug 3, 2020, at 2:57 PM, Arvind Sankar wrote:
>>>
>>> On Mon, Aug 03, 2020 at 12:40:22PM -0700, Nick Terrell wrote:
From: Nick Terrell
This pat
> On Aug 4, 2020, at 8:16 AM, Arvind Sankar wrote:
>
> On Tue, Aug 04, 2020 at 10:32:36AM +0200, Pavel Machek wrote:
>> Hi!
>>
> I've measured the kernel decompression speed using QEMU before and after
> this patch for the x86_64 and i386 architectures. The speed-up is about
> 10x
On Tue, Aug 04, 2020 at 02:57:50AM +, Nick Terrell wrote:
>
>
> > On Aug 3, 2020, at 6:56 PM, Arvind Sankar wrote:
> >
>
> > -- I see that ZSTD_copy8 is already using __builtin_memcpy,
> > but there must be more that can be optimized? There's a couple 1/2-byte
> > sized copies in huf_decom
On Tue, Aug 04, 2020 at 10:32:36AM +0200, Pavel Machek wrote:
> Hi!
>
> > >> I've measured the kernel decompression speed using QEMU before and after
> > >> this patch for the x86_64 and i386 architectures. The speed-up is about
> > >> 10x as shown below.
> > >>
> > >> Code ArchKernel Siz
Hi!
> >> I've measured the kernel decompression speed using QEMU before and after
> >> this patch for the x86_64 and i386 architectures. The speed-up is about
> >> 10x as shown below.
> >>
> >> Code ArchKernel Size TimeSpeed
> >> v5.8 x86_64 11504832 B 148 ms 79 MB
> On Aug 3, 2020, at 6:56 PM, Arvind Sankar wrote:
>
> On Mon, Aug 03, 2020 at 10:55:01PM +, Nick Terrell wrote:
>>
>>
>>> On Aug 3, 2020, at 2:57 PM, Arvind Sankar wrote:
>>>
>>> On Mon, Aug 03, 2020 at 12:40:22PM -0700, Nick Terrell wrote:
From: Nick Terrell
This patc
On Mon, Aug 03, 2020 at 10:55:01PM +, Nick Terrell wrote:
>
>
> > On Aug 3, 2020, at 2:57 PM, Arvind Sankar wrote:
> >
> > On Mon, Aug 03, 2020 at 12:40:22PM -0700, Nick Terrell wrote:
> >> From: Nick Terrell
> >>
> >> This patch replaces all memcpy() calls with LZ4_memcpy() which calls
>
> On Aug 3, 2020, at 2:57 PM, Arvind Sankar wrote:
>
> On Mon, Aug 03, 2020 at 12:40:22PM -0700, Nick Terrell wrote:
>> From: Nick Terrell
>>
>> This patch replaces all memcpy() calls with LZ4_memcpy() which calls
>> __builtin_memcpy() so the compiler can inline it.
>>
>> LZ4 relies heavily
On Mon, Aug 03, 2020 at 12:40:22PM -0700, Nick Terrell wrote:
> From: Nick Terrell
>
> This patch replaces all memcpy() calls with LZ4_memcpy() which calls
> __builtin_memcpy() so the compiler can inline it.
>
> LZ4 relies heavily on memcpy() with a constant size being inlined. In
> x86 and i386
From: Nick Terrell
This patch replaces all memcpy() calls with LZ4_memcpy() which calls
__builtin_memcpy() so the compiler can inline it.
LZ4 relies heavily on memcpy() with a constant size being inlined. In
x86 and i386 pre-boot environments memcpy() cannot be inlined because
memcpy() doesn't g
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