From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jerin Jacob Subject: [PATCH 1/2] eal: introduce rte_prefetch_non_temporal Date: Sun, 6 Dec 2015 20:54:29 +0530 Message-ID: <1449415470-25545-2-git-send-email-jerin.jacob@caviumnetworks.com> References: <1449415470-25545-1-git-send-email-jerin.jacob@caviumnetworks.com> Mime-Version: 1.0 Content-Type: text/plain To: Return-path: Received: from na01-bl2-obe.outbound.protection.outlook.com (mail-bl2on0078.outbound.protection.outlook.com [65.55.169.78]) by dpdk.org (Postfix) with ESMTP id EFE7C924F for ; Sun, 6 Dec 2015 16:25:06 +0100 (CET) In-Reply-To: <1449415470-25545-1-git-send-email-jerin.jacob@caviumnetworks.com> List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" 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 --- 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