* Vector optimized IP checksum
@ 2022-06-16 7:07 Morten Brørup
2022-06-16 13:46 ` Mattias Rönnblom
0 siblings, 1 reply; 3+ messages in thread
From: Morten Brørup @ 2022-06-16 7:07 UTC (permalink / raw)
To: Jasvinder Singh; +Cc: dev, Olivier Matz, Maxime Coquelin, Chenbo Xia
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Hi Jasvinder,
As the Packet CRC maintainer, have you considered adding vector optimized variants of the rte_raw_cksum() function?
It might benefit some of the software PMDs, such as tap and virtio.
Med venlig hilsen / Kind regards,
-Morten Brørup
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^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Vector optimized IP checksum
2022-06-16 7:07 Vector optimized IP checksum Morten Brørup
@ 2022-06-16 13:46 ` Mattias Rönnblom
2022-06-16 14:11 ` Morten Brørup
0 siblings, 1 reply; 3+ messages in thread
From: Mattias Rönnblom @ 2022-06-16 13:46 UTC (permalink / raw)
To: Morten Brørup, Jasvinder Singh
Cc: dev, Olivier Matz, Maxime Coquelin, Chenbo Xia
On 2022-06-16 09:07, Morten Brørup wrote:
> Hi Jasvinder,
>
> As the Packet CRC maintainer, have you considered adding vector
> optimized variants of the rte_raw_cksum() function?
>
The current implementation is vectorized by the compiler.
In my experience, hand-crafting it using SIMD intrinsics doesn't improve
the performance enough to warrant the trouble.
> It might benefit some of the software PMDs, such as tap and virtio.
>
> Med venlig hilsen / Kind regards,
>
> -Morten Brørup
>
^ permalink raw reply [flat|nested] 3+ messages in thread
* RE: Vector optimized IP checksum
2022-06-16 13:46 ` Mattias Rönnblom
@ 2022-06-16 14:11 ` Morten Brørup
0 siblings, 0 replies; 3+ messages in thread
From: Morten Brørup @ 2022-06-16 14:11 UTC (permalink / raw)
To: Mattias Rönnblom, Jasvinder Singh
Cc: dev, Olivier Matz, Maxime Coquelin, Chenbo Xia
> From: Mattias Rönnblom [mailto:hofors@lysator.liu.se]
> Sent: Thursday, 16 June 2022 15.46
>
> On 2022-06-16 09:07, Morten Brørup wrote:
> > Hi Jasvinder,
> >
> > As the Packet CRC maintainer, have you considered adding vector
> > optimized variants of the rte_raw_cksum() function?
> >
>
> The current implementation is vectorized by the compiler.
>
> In my experience, hand-crafting it using SIMD intrinsics doesn't
> improve
> the performance enough to warrant the trouble.
>
That is great, Mattias!
That definitely puts my question to rest. :-)
^ permalink raw reply [flat|nested] 3+ messages in thread
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2022-06-16 7:07 Vector optimized IP checksum Morten Brørup
2022-06-16 13:46 ` Mattias Rönnblom
2022-06-16 14:11 ` Morten Brørup
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