[RFC PATCH 0/2] Fix examples/distributor build issue for non x86

[RFC PATCH 0/2] Fix examples/distributor build issue for non x86

[Jerin Jacob]

Introduced rte_prefetch_non_temporal() to remove IA specific _mm_prefect(addr, 0)
gcc intrinsic and build examples/distributor for non 86 platform

Not sure the rte_prefetch_non_temporal mapping correct for
all the platforms. Architecture maintainers please check the mapping for
rte_prefetch_non_temporal() for specific architecures

Jerin Jacob (2):
  eal: introduce rte_prefetch_non_temporal
  examples/distributor: remove IA specific __mm_prefetch

 examples/distributor/main.c                              |  9 +++++----
 lib/librte_eal/common/include/arch/arm/rte_prefetch_32.h |  5 +++++
 lib/librte_eal/common/include/arch/arm/rte_prefetch_64.h |  5 +++++
 lib/librte_eal/common/include/arch/ppc_64/rte_prefetch.h |  5 +++++
 lib/librte_eal/common/include/arch/tile/rte_prefetch.h   |  5 +++++
 lib/librte_eal/common/include/arch/x86/rte_prefetch.h    |  5 +++++
 lib/librte_eal/common/include/generic/rte_prefetch.h     | 12 ++++++++++++
 7 files changed, 42 insertions(+), 4 deletions(-)

--
2.1.0

[PATCH 1/2] eal: introduce rte_prefetch_non_temporal

[Jerin Jacob]

non-temporal/transient/stream version of rte_prefetch0()

The non-temporal prefetch is intended as a prefetch hint that processor
will use the prefetched data only once or short period,
unlike the rte_prefetch0() function which imply that
prefetched data to use repeatedly.

Signed-off-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>
---
 lib/librte_eal/common/include/arch/arm/rte_prefetch_32.h |  5 +++++
 lib/librte_eal/common/include/arch/arm/rte_prefetch_64.h |  5 +++++
 lib/librte_eal/common/include/arch/ppc_64/rte_prefetch.h |  5 +++++
 lib/librte_eal/common/include/arch/tile/rte_prefetch.h   |  5 +++++
 lib/librte_eal/common/include/arch/x86/rte_prefetch.h    |  5 +++++
 lib/librte_eal/common/include/generic/rte_prefetch.h     | 12 ++++++++++++
 6 files changed, 37 insertions(+)

diff --git a/lib/librte_eal/common/include/arch/arm/rte_prefetch_32.h b/lib/librte_eal/common/include/arch/arm/rte_prefetch_32.h
index b716384..3157224 100644
--- a/lib/librte_eal/common/include/arch/arm/rte_prefetch_32.h
+++ b/lib/librte_eal/common/include/arch/arm/rte_prefetch_32.h
@@ -54,6 +54,11 @@ static inline void rte_prefetch2(const volatile void *p)
 	asm volatile ("pld [%0]" : : "r" (p));
 }
 
+static inline void rte_prefetch_non_temporal(const volatile void *p)
+{
+	rte_prefetch0(p);
+}
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/librte_eal/common/include/arch/arm/rte_prefetch_64.h b/lib/librte_eal/common/include/arch/arm/rte_prefetch_64.h
index f9cc62e..3ed46a4 100644
--- a/lib/librte_eal/common/include/arch/arm/rte_prefetch_64.h
+++ b/lib/librte_eal/common/include/arch/arm/rte_prefetch_64.h
@@ -54,6 +54,11 @@ static inline void rte_prefetch2(const volatile void *p)
 	asm volatile ("PRFM PLDL3KEEP, [%0]" : : "r" (p));
 }
 
+static inline void rte_prefetch_non_temporal(const volatile void *p)
+{
+	asm volatile ("PRFM PLDL1STRM, [%0]" : : "r" (p));
+}
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/librte_eal/common/include/arch/ppc_64/rte_prefetch.h b/lib/librte_eal/common/include/arch/ppc_64/rte_prefetch.h
index fea3be1..cab6fe0 100644
--- a/lib/librte_eal/common/include/arch/ppc_64/rte_prefetch.h
+++ b/lib/librte_eal/common/include/arch/ppc_64/rte_prefetch.h
@@ -54,6 +54,11 @@ static inline void rte_prefetch2(const volatile void *p)
 	asm volatile ("dcbt 0,%[p],1" : : [p] "r" (p));
 }
 
+static inline void rte_prefetch_non_temporal(const volatile void *p)
+{
+	rte_prefetch0(p);
+}
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/librte_eal/common/include/arch/tile/rte_prefetch.h b/lib/librte_eal/common/include/arch/tile/rte_prefetch.h
index c94075c..19d3c6e 100644
--- a/lib/librte_eal/common/include/arch/tile/rte_prefetch.h
+++ b/lib/librte_eal/common/include/arch/tile/rte_prefetch.h
@@ -54,6 +54,11 @@ static inline void rte_prefetch2(const volatile void *p)
 	__builtin_prefetch((const void *)(uintptr_t)p, 0, 1);
 }
 
+static inline void rte_prefetch_non_temporal(const volatile void *p)
+{
+	rte_prefetch0(p);
+}
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/librte_eal/common/include/arch/x86/rte_prefetch.h b/lib/librte_eal/common/include/arch/x86/rte_prefetch.h
index 8e6e02c..5dac47e 100644
--- a/lib/librte_eal/common/include/arch/x86/rte_prefetch.h
+++ b/lib/librte_eal/common/include/arch/x86/rte_prefetch.h
@@ -55,6 +55,11 @@ static inline void rte_prefetch2(const volatile void *p)
 	asm volatile ("prefetcht2 %[p]" : : [p] "m" (*(const volatile char *)p));
 }
 
+static inline void rte_prefetch_non_temporal(const volatile void *p)
+{
+	asm volatile ("prefetchnta %[p]" : : [p] "m" (*(const volatile char *)p));
+}
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/librte_eal/common/include/generic/rte_prefetch.h b/lib/librte_eal/common/include/generic/rte_prefetch.h
index 725715f..95c3fbc 100644
--- a/lib/librte_eal/common/include/generic/rte_prefetch.h
+++ b/lib/librte_eal/common/include/generic/rte_prefetch.h
@@ -68,4 +68,16 @@ static inline void rte_prefetch1(const volatile void *p);
  */
 static inline void rte_prefetch2(const volatile void *p);
 
+/**
+ * Prefetch a cache line into all cache levels(non-temporal/transient version)
+ *
+ * The non-temporal prefetch is intended as a prefetch hint that processor will
+ * use the prefetched data only once or short period, unlike the
+ * rte_prefetch0() function which imply that prefetched data to use repeatedly.
+ *
+ * @param p
+ *   Address to prefetch
+ */
+static inline void rte_prefetch_non_temporal(const volatile void *p);
+
 #endif /* _RTE_PREFETCH_H_ */
-- 
2.1.0

Re: [PATCH 1/2] eal: introduce rte_prefetch_non_temporal

[Thomas Monjalon]

Please arch maintainers, your ack would be appreciated.

2015-12-06 20:54, Jerin Jacob:
> +static inline void rte_prefetch_non_temporal(const volatile void *p)
> +{
> +	rte_prefetch0(p);
> +}

A comment about using the same instruction for temporal and non-temporal?

> +/**
> + * Prefetch a cache line into all cache levels(non-temporal/transient version)

space missing before paren

Re: [PATCH 1/2] eal: introduce rte_prefetch_non_temporal

[Jan Viktorin]

I am OK with this patch.

On Sun, 6 Dec 2015 20:54:29 +0530
Jerin Jacob <jerin.jacob@caviumnetworks.com> wrote:

> non-temporal/transient/stream version of rte_prefetch0()
> 
> The non-temporal prefetch is intended as a prefetch hint that processor
> will use the prefetched data only once or short period,
> unlike the rte_prefetch0() function which imply that
> prefetched data to use repeatedly.
> 
> Signed-off-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>
Acked-by: Jan Viktorin <viktorin@rehivetech.com>

[PATCH 2/2] examples/distributor: remove IA specific __mm_prefetch

[Jerin Jacob]

use rte_prefetch_non_temporal() abstraction instead of _mm_prefetch(x, 0)
to in-order to build distributor application for non x86 platforms

Signed-off-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>
---
 examples/distributor/main.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/examples/distributor/main.c b/examples/distributor/main.c
index 4e74f8f..c0201a9 100644
--- a/examples/distributor/main.c
+++ b/examples/distributor/main.c
@@ -42,6 +42,7 @@
 #include <rte_cycles.h>
 #include <rte_malloc.h>
 #include <rte_debug.h>
+#include <rte_prefetch.h>
 #include <rte_distributor.h>
 
 #define RX_RING_SIZE 256
@@ -335,13 +336,13 @@ lcore_tx(struct rte_ring *in_r)
 
 			/* for traffic we receive, queue it up for transmit */
 			uint16_t i;
-			_mm_prefetch((void *)bufs[0], 0);
-			_mm_prefetch((void *)bufs[1], 0);
-			_mm_prefetch((void *)bufs[2], 0);
+			rte_prefetch_non_temporal((void *)bufs[0]);
+			rte_prefetch_non_temporal((void *)bufs[1]);
+			rte_prefetch_non_temporal((void *)bufs[2]);
 			for (i = 0; i < nb_rx; i++) {
 				struct output_buffer *outbuf;
 				uint8_t outp;
-				_mm_prefetch((void *)bufs[i + 3], 0);
+				rte_prefetch_non_temporal((void *)bufs[i + 3]);
 				/*
 				 * workers should update in_port to hold the
 				 * output port value
-- 
2.1.0

Re: [RFC PATCH 0/2] Fix examples/distributor build issue for non x86

[Jerin Jacob]

On Sun, Dec 06, 2015 at 08:54:28PM +0530, Jerin Jacob wrote:
> Introduced rte_prefetch_non_temporal() to remove IA specific _mm_prefect(addr, 0)
> gcc intrinsic and build examples/distributor for non 86 platform

ping for review.

> 
> Not sure the rte_prefetch_non_temporal mapping correct for
> all the platforms. Architecture maintainers please check the mapping for
> rte_prefetch_non_temporal() for specific architecures
> 
> Jerin Jacob (2):
>   eal: introduce rte_prefetch_non_temporal
>   examples/distributor: remove IA specific __mm_prefetch
> 
>  examples/distributor/main.c                              |  9 +++++----
>  lib/librte_eal/common/include/arch/arm/rte_prefetch_32.h |  5 +++++
>  lib/librte_eal/common/include/arch/arm/rte_prefetch_64.h |  5 +++++
>  lib/librte_eal/common/include/arch/ppc_64/rte_prefetch.h |  5 +++++
>  lib/librte_eal/common/include/arch/tile/rte_prefetch.h   |  5 +++++
>  lib/librte_eal/common/include/arch/x86/rte_prefetch.h    |  5 +++++
>  lib/librte_eal/common/include/generic/rte_prefetch.h     | 12 ++++++++++++
>  7 files changed, 42 insertions(+), 4 deletions(-)
> 
> --
> 2.1.0
> 

Re: [RFC PATCH 0/2] Fix examples/distributor build issue for non x86

[Bruce Richardson]

On Fri, Jan 29, 2016 at 08:51:41AM +0530, Jerin Jacob wrote:
> On Sun, Dec 06, 2015 at 08:54:28PM +0530, Jerin Jacob wrote:
> > Introduced rte_prefetch_non_temporal() to remove IA specific _mm_prefect(addr, 0)
> > gcc intrinsic and build examples/distributor for non 86 platform
> 
> ping for review.
> 

Is there much performance difference between making this a prefetch NT vs making
it an rte_prefetch0 on the platforms you have tested?

/Bruce

> > 
> > Not sure the rte_prefetch_non_temporal mapping correct for
> > all the platforms. Architecture maintainers please check the mapping for
> > rte_prefetch_non_temporal() for specific architecures
> > 
> > Jerin Jacob (2):
> >   eal: introduce rte_prefetch_non_temporal
> >   examples/distributor: remove IA specific __mm_prefetch
> > 
> >  examples/distributor/main.c                              |  9 +++++----
> >  lib/librte_eal/common/include/arch/arm/rte_prefetch_32.h |  5 +++++
> >  lib/librte_eal/common/include/arch/arm/rte_prefetch_64.h |  5 +++++
> >  lib/librte_eal/common/include/arch/ppc_64/rte_prefetch.h |  5 +++++
> >  lib/librte_eal/common/include/arch/tile/rte_prefetch.h   |  5 +++++
> >  lib/librte_eal/common/include/arch/x86/rte_prefetch.h    |  5 +++++
> >  lib/librte_eal/common/include/generic/rte_prefetch.h     | 12 ++++++++++++
> >  7 files changed, 42 insertions(+), 4 deletions(-)
> > 
> > --
> > 2.1.0
> > 

Re: [RFC PATCH 0/2] Fix examples/distributor build issue for non x86

[Jerin Jacob]

On Fri, Jan 29, 2016 at 08:03:37AM -0700, Bruce Richardson wrote:
> On Fri, Jan 29, 2016 at 08:51:41AM +0530, Jerin Jacob wrote:
> > On Sun, Dec 06, 2015 at 08:54:28PM +0530, Jerin Jacob wrote:
> > > Introduced rte_prefetch_non_temporal() to remove IA specific _mm_prefect(addr, 0)
> > > gcc intrinsic and build examples/distributor for non 86 platform
> > 
> > ping for review.
> > 
> 
> Is there much performance difference between making this a prefetch NT vs making
> it an rte_prefetch0 on the platforms you have tested?

Not much difference. But, I think its worth keep the abstraction as
IA and arm64 architecture supports it.

Jerin

> 
> /Bruce
> 
> > > 
> > > Not sure the rte_prefetch_non_temporal mapping correct for
> > > all the platforms. Architecture maintainers please check the mapping for
> > > rte_prefetch_non_temporal() for specific architecures
> > > 
> > > Jerin Jacob (2):
> > >   eal: introduce rte_prefetch_non_temporal
> > >   examples/distributor: remove IA specific __mm_prefetch
> > > 
> > >  examples/distributor/main.c                              |  9 +++++----
> > >  lib/librte_eal/common/include/arch/arm/rte_prefetch_32.h |  5 +++++
> > >  lib/librte_eal/common/include/arch/arm/rte_prefetch_64.h |  5 +++++
> > >  lib/librte_eal/common/include/arch/ppc_64/rte_prefetch.h |  5 +++++
> > >  lib/librte_eal/common/include/arch/tile/rte_prefetch.h   |  5 +++++
> > >  lib/librte_eal/common/include/arch/x86/rte_prefetch.h    |  5 +++++
> > >  lib/librte_eal/common/include/generic/rte_prefetch.h     | 12 ++++++++++++
> > >  7 files changed, 42 insertions(+), 4 deletions(-)
> > > 
> > > --
> > > 2.1.0
> > > 

[PATCH v2 0/2] Fix examples/distributor build issue for non x86

[Jerin Jacob]

Introduced rte_prefetch_non_temporal() to remove IA specific _mm_prefect(addr, 0)
gcc intrinsic and build examples/distributor for non 86 platform

Not sure the rte_prefetch_non_temporal mapping correct for
all the platforms. Architecture maintainers please check the mapping for
rte_prefetch_non_temporal() for specific architecures

v1..v2

Addessed Thomas's review comments[1]
[1] http://dpdk.org/dev/patchwork/patch/9369/

Jerin Jacob (2):
  eal: introduce rte_prefetch_non_temporal
  examples/distributor: remove IA specific __mm_prefetch

 examples/distributor/main.c                              |  9 +++++----
 lib/librte_eal/common/include/arch/arm/rte_prefetch_32.h |  6 ++++++
 lib/librte_eal/common/include/arch/arm/rte_prefetch_64.h |  5 +++++
 lib/librte_eal/common/include/arch/ppc_64/rte_prefetch.h |  6 ++++++
 lib/librte_eal/common/include/arch/tile/rte_prefetch.h   |  6 ++++++
 lib/librte_eal/common/include/arch/x86/rte_prefetch.h    |  5 +++++
 lib/librte_eal/common/include/generic/rte_prefetch.h     | 12 ++++++++++++
 7 files changed, 45 insertions(+), 4 deletions(-)

-- 
2.1.0

[PATCH v2 1/2] eal: introduce rte_prefetch_non_temporal

[Jerin Jacob]

non-temporal/transient/stream version of rte_prefetch0()

The non-temporal prefetch is intended as a prefetch hint that processor
will use the prefetched data only once or short period,
unlike the rte_prefetch0() function which imply that
prefetched data to use repeatedly.

Signed-off-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>
Acked-by: Jan Viktorin <viktorin@rehivetech.com>
---
 lib/librte_eal/common/include/arch/arm/rte_prefetch_32.h |  6 ++++++
 lib/librte_eal/common/include/arch/arm/rte_prefetch_64.h |  5 +++++
 lib/librte_eal/common/include/arch/ppc_64/rte_prefetch.h |  6 ++++++
 lib/librte_eal/common/include/arch/tile/rte_prefetch.h   |  6 ++++++
 lib/librte_eal/common/include/arch/x86/rte_prefetch.h    |  5 +++++
 lib/librte_eal/common/include/generic/rte_prefetch.h     | 12 ++++++++++++
 6 files changed, 40 insertions(+)

diff --git a/lib/librte_eal/common/include/arch/arm/rte_prefetch_32.h b/lib/librte_eal/common/include/arch/arm/rte_prefetch_32.h
index b716384..5aeed22 100644
--- a/lib/librte_eal/common/include/arch/arm/rte_prefetch_32.h
+++ b/lib/librte_eal/common/include/arch/arm/rte_prefetch_32.h
@@ -54,6 +54,12 @@ static inline void rte_prefetch2(const volatile void *p)
 	asm volatile ("pld [%0]" : : "r" (p));
 }
 
+static inline void rte_prefetch_non_temporal(const volatile void *p)
+{
+	/* non-temporal version not available, fallback to rte_prefetch0 */
+	rte_prefetch0(p);
+}
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/librte_eal/common/include/arch/arm/rte_prefetch_64.h b/lib/librte_eal/common/include/arch/arm/rte_prefetch_64.h
index f9cc62e..3ed46a4 100644
--- a/lib/librte_eal/common/include/arch/arm/rte_prefetch_64.h
+++ b/lib/librte_eal/common/include/arch/arm/rte_prefetch_64.h
@@ -54,6 +54,11 @@ static inline void rte_prefetch2(const volatile void *p)
 	asm volatile ("PRFM PLDL3KEEP, [%0]" : : "r" (p));
 }
 
+static inline void rte_prefetch_non_temporal(const volatile void *p)
+{
+	asm volatile ("PRFM PLDL1STRM, [%0]" : : "r" (p));
+}
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/librte_eal/common/include/arch/ppc_64/rte_prefetch.h b/lib/librte_eal/common/include/arch/ppc_64/rte_prefetch.h
index fea3be1..bcc7185 100644
--- a/lib/librte_eal/common/include/arch/ppc_64/rte_prefetch.h
+++ b/lib/librte_eal/common/include/arch/ppc_64/rte_prefetch.h
@@ -54,6 +54,12 @@ static inline void rte_prefetch2(const volatile void *p)
 	asm volatile ("dcbt 0,%[p],1" : : [p] "r" (p));
 }
 
+static inline void rte_prefetch_non_temporal(const volatile void *p)
+{
+	/* non-temporal version not available, fallback to rte_prefetch0 */
+	rte_prefetch0(p);
+}
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/librte_eal/common/include/arch/tile/rte_prefetch.h b/lib/librte_eal/common/include/arch/tile/rte_prefetch.h
index c94075c..7a1bb93 100644
--- a/lib/librte_eal/common/include/arch/tile/rte_prefetch.h
+++ b/lib/librte_eal/common/include/arch/tile/rte_prefetch.h
@@ -54,6 +54,12 @@ static inline void rte_prefetch2(const volatile void *p)
 	__builtin_prefetch((const void *)(uintptr_t)p, 0, 1);
 }
 
+static inline void rte_prefetch_non_temporal(const volatile void *p)
+{
+	/* non-temporal version not available, fallback to rte_prefetch0 */
+	rte_prefetch0(p);
+}
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/librte_eal/common/include/arch/x86/rte_prefetch.h b/lib/librte_eal/common/include/arch/x86/rte_prefetch.h
index 8e6e02c..5dac47e 100644
--- a/lib/librte_eal/common/include/arch/x86/rte_prefetch.h
+++ b/lib/librte_eal/common/include/arch/x86/rte_prefetch.h
@@ -55,6 +55,11 @@ static inline void rte_prefetch2(const volatile void *p)
 	asm volatile ("prefetcht2 %[p]" : : [p] "m" (*(const volatile char *)p));
 }
 
+static inline void rte_prefetch_non_temporal(const volatile void *p)
+{
+	asm volatile ("prefetchnta %[p]" : : [p] "m" (*(const volatile char *)p));
+}
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/librte_eal/common/include/generic/rte_prefetch.h b/lib/librte_eal/common/include/generic/rte_prefetch.h
index 725715f..07e409e 100644
--- a/lib/librte_eal/common/include/generic/rte_prefetch.h
+++ b/lib/librte_eal/common/include/generic/rte_prefetch.h
@@ -68,4 +68,16 @@ static inline void rte_prefetch1(const volatile void *p);
  */
 static inline void rte_prefetch2(const volatile void *p);
 
+/**
+ * Prefetch a cache line into all cache levels (non-temporal/transient version)
+ *
+ * The non-temporal prefetch is intended as a prefetch hint that processor will
+ * use the prefetched data only once or short period, unlike the
+ * rte_prefetch0() function which imply that prefetched data to use repeatedly.
+ *
+ * @param p
+ *   Address to prefetch
+ */
+static inline void rte_prefetch_non_temporal(const volatile void *p);
+
 #endif /* _RTE_PREFETCH_H_ */
-- 
2.1.0

[PATCH v2 2/2] examples/distributor: remove IA specific __mm_prefetch

[Jerin Jacob]

use rte_prefetch_non_temporal() abstraction instead of _mm_prefetch(x, 0)
to in-order to build distributor application for non x86 platforms

Signed-off-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>
---
 examples/distributor/main.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/examples/distributor/main.c b/examples/distributor/main.c
index 4e74f8f..c0201a9 100644
--- a/examples/distributor/main.c
+++ b/examples/distributor/main.c
@@ -42,6 +42,7 @@
 #include <rte_cycles.h>
 #include <rte_malloc.h>
 #include <rte_debug.h>
+#include <rte_prefetch.h>
 #include <rte_distributor.h>
 
 #define RX_RING_SIZE 256
@@ -335,13 +336,13 @@ lcore_tx(struct rte_ring *in_r)
 
 			/* for traffic we receive, queue it up for transmit */
 			uint16_t i;
-			_mm_prefetch((void *)bufs[0], 0);
-			_mm_prefetch((void *)bufs[1], 0);
-			_mm_prefetch((void *)bufs[2], 0);
+			rte_prefetch_non_temporal((void *)bufs[0]);
+			rte_prefetch_non_temporal((void *)bufs[1]);
+			rte_prefetch_non_temporal((void *)bufs[2]);
 			for (i = 0; i < nb_rx; i++) {
 				struct output_buffer *outbuf;
 				uint8_t outp;
-				_mm_prefetch((void *)bufs[i + 3], 0);
+				rte_prefetch_non_temporal((void *)bufs[i + 3]);
 				/*
 				 * workers should update in_port to hold the
 				 * output port value
-- 
2.1.0

Re: [PATCH v2 0/2] Fix examples/distributor build issue for non x86

[Thomas Monjalon]

2016-02-12 16:43, Jerin Jacob:
> Introduced rte_prefetch_non_temporal() to remove IA specific _mm_prefect(addr, 0)
> gcc intrinsic and build examples/distributor for non 86 platform
> 
> Not sure the rte_prefetch_non_temporal mapping correct for
> all the platforms. Architecture maintainers please check the mapping for
> rte_prefetch_non_temporal() for specific architecures
> 
> v1..v2
> 
> Addessed Thomas's review comments[1]
> [1] http://dpdk.org/dev/patchwork/patch/9369/
> 
> Jerin Jacob (2):
>   eal: introduce rte_prefetch_non_temporal
>   examples/distributor: remove IA specific __mm_prefetch

Applied, thanks