[PATCH 1/2] eal: introduce rte_prefetch_non_temporal
From: Jerin Jacob <hidden>
Date: 2015-12-06 15:25:06
Subsystem:
library code, the rest · Maintainers:
Andrew Morton, Linus Torvalds
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 <redacted> --- 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