gt; > Sent: Thursday, April 23, 2015 9:12 AM
>> > > > To: Wodkowski, PawelX
>> > > > Cc: dev at dpdk.org
>> > > > Subject: Re: [dpdk-dev] [PATCH] Implement memcmp using AVX/SSE
>> instructio
>> > > >
>> > > > On Thu
> > >
> > >
> > > > -Original Message-
> > > > From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Bruce
> Richardson
> > > > Sent: Thursday, April 23, 2015 9:12 AM
> > > > To: Wodkowski, PawelX
> > > > Cc: dev
org] On Behalf Of Bruce Richardson
> > > Sent: Thursday, April 23, 2015 9:12 AM
> > > To: Wodkowski, PawelX
> > > Cc: dev at dpdk.org
> > > Subject: Re: [dpdk-dev] [PATCH] Implement memcmp using AVX/SSE instructio
> > >
> > > On Thu, Apr
On 23 April 2015 at 10:11, Bruce Richardson
wrote:
> Also, if I read your quoted performance numbers in your earlier mail
> correctly,
> we are only looking at a 1-4% performance increase. Is the additional code
> to
> maintain worth the benefit?
>
... and if so, how would one decide whether it
On 2015-04-22 17:33, Ravi Kerur wrote:
> +/**
> + * Compare bytes between two locations. The locations must not overlap.
> + *
> + * @note This is implemented as a macro, so it's address should not be taken
> + * and care is needed as parameter expressions may be evaluated multiple
> times.
> + *
> -Original Message-
> From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Bruce Richardson
> Sent: Thursday, April 23, 2015 9:12 AM
> To: Wodkowski, PawelX
> Cc: dev at dpdk.org
> Subject: Re: [dpdk-dev] [PATCH] Implement memcmp using AVX/SSE instructio
>
>
On Thu, Apr 23, 2015 at 09:24:52AM +0200, Pawel Wodkowski wrote:
> On 2015-04-22 17:33, Ravi Kerur wrote:
> >+/**
> >+ * Compare bytes between two locations. The locations must not overlap.
> >+ *
> >+ * @note This is implemented as a macro, so it's address should not be taken
> >+ * and care is ne
To: Wodkowski, PawelX
> > Cc: dev at dpdk.org
> > Subject: Re: [dpdk-dev] [PATCH] Implement memcmp using AVX/SSE instructio
> >
> > On Thu, Apr 23, 2015 at 09:24:52AM +0200, Pawel Wodkowski wrote:
> > > On 2015-04-22 17:33, Ravi Kerur wrote:
> > > >+/**
On Thu, Apr 23, 2015 at 12:24 AM, Pawel Wodkowski <
pawelx.wodkowski at intel.com> wrote:
> On 2015-04-22 17:33, Ravi Kerur wrote:
>
>> +/**
>> + * Compare bytes between two locations. The locations must not overlap.
>> + *
>> + * @note This is implemented as a macro, so it's address should not be
This patch replaces memcmp and strncmp in librte_hash with rte_memcmp which
is implemented with AVX/SSE instructions.
Preliminary results on Intel(R) Core(TM) i7-4790 CPU @ 3.60GHz, Ubuntu
14.04 x86_64 shows
1 second improvement when hash key length <= 64
4 seconds improvement when hash key lengt
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