雖然這篇__builtin_prefetch鄉民發文沒有被收入到精華區：在__builtin_prefetch這個話題中，我們另外找到其它相關的精選爆讚文章
[爆卦]__builtin_prefetch是什麼？優點缺點精華區懶人包
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#1数据预取__builtin_prefetch() - dzqabc - 博客园
__builtin_prefetch () 是gcc 的一个内置函数。它通过对数据手工预取的方法，减少了读取延迟，从而提高了性能，但该函数也需要CPU 的支持。
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#2__builtin_prefetch.3
__BUILTIN_PREFETCH (3) Library Functions Manual __BUILTIN_PREFETCH(3) NAME __builtin_prefetch - GNU extension to prefetch memory SYNOPSIS ...
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#3__builtin_prefetch有什么优势吗？ - 问答- 云+社区- 腾讯云
可以给出一个示例或链接到一个 __builtin_prefetch 在GCC 中使用的例子（或者只是一般的asm指令prefetcht0）来获得实质性的性能优势吗？
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#4C++ __builtin_prefetch函數代碼示例- 純淨天空
本文整理匯總了C++中__builtin_prefetch函數的典型用法代碼示例。如果您正苦於以下問題：C++ __builtin_prefetch函數的具體用法？C++ __builtin_prefetch怎麽用？
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#5__builtin_prefetch, How much does it read? - Stack Overflow
Don't use __builtin_prefetch too often (i.e. don't put a lot of them inside a loop). Measure the performance gain if you need them, and use GCC ...
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#6Other Builtins (Using the GNU Compiler Collection (GCC))
All these functions have corresponding versions prefixed with __builtin_ , which may ... Built-in Function: void __builtin_prefetch (const void * addr , .
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#7Arm C/C++ Compiler Reference Guide Version 20.1
Prefetching with __builtin_prefetch. This topic describes how you can enable prefetching in your C/C++ code with Arm Compiler for Linux.
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#8【C++】我應該忽略__builtin_prefetch()函式還是將其替換？
【C++】我應該忽略__builtin_prefetch()函式還是將其替換？ 2020-12-20 C++. 當我將程式碼從linux移植到win32時，會用到u builtin_prefetch（）函式。
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#9__builtin_prefetch()_chrysanthemumcao的专栏-CSDN博客
__builtin_prefetch () 是gcc 的一个内置函数。它通过对数据手工预取的方法，减少了读取延迟，从而提高了性能，但该函数也需要CPU 的支持。
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#10c++ - __builtin_prefetch，它读多少？ - IT工具网
我正在尝试通过使用优化一些C++(RK4) __builtin_prefetch 我不知道如何预取整个结构。 我不明白读了多少 const void *addr 。我想加载 from 和 to 的下一个值。
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#11__builtin_prefetch(3) - NetBSD Manual Pages
The __builtin_prefetch() function prefetches memory from addr. The rationale is to minimize cache-miss latency by trying to move data into a cache before ...
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#12__builtin_prefetch()_chrysanthemumcao的专栏-程序员资料 ...
__builtin_prefetch () 是gcc 的一个内置函数。它通过对数据手工预取的方法，减少了读取延迟，从而提高了性能，但该函数也需要CPU 的支持。该函数的原型为：void ...
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#13c++ - __builtin_prefetch，它讀多少？ - IT閱讀 - ITREAD01 ...
我正在嘗試通過使用優化一些C++(RK4) __builtin_prefetch 我不知道如何預取整個結構。 我不明白讀了多少 const void *addr 。我想載入 from 和 to 的下一個值。
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#14__builtin_prefetch 语义检查错误_鲲鹏开发套件_ ... - 帮助中心
在这段代码中，因为__builtin_prefetch的第二个参数需要是常量，所以先用__builtin_constant_p检查forWrite是否是常量。但是，对于Clang而言， ...
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#15数据预取__builtin_prefetch()_mob604756fd2a33的技术博客
__builtin_prefetch () 是gcc 的一个内置函数。它通过对数据手工预取的方法，减少了读取延迟，从而提高了性能，但该函数也需要CPU 的支持。
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#16c - why does GCC __builtin_prefetch not improve performance?
Adding explicit __builtin_prefetch can slow down your code. You need to measure. As Retired Ninja commented, prefetching in one loop and ...
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#17clang/builtin-prefetch.c at master · llvm-mirror/clang - GitHub
__builtin_prefetch (&a, "hello", 2); // expected-error{{argument to '__builtin_prefetch' must be a constant integer}}. __builtin_prefetch(&a, a, ...
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#18lib/eal/include/generic/rte_prefetch.h Source File - DPDK
74 __builtin_prefetch(p, 1, 3);. 75 }. 76. 87 __rte_experimental. 88 static inline void. 89 rte_prefetch1_write(const void *p).
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#19__builtin_prefetch(3) [netbsd man page] - The UNIX and Linux ...
__builtin_prefetch -- GNU extension to prefetch memory SYNOPSIS ... The __builtin_prefetch() function prefetches memory from addr.
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#20UCX: compiler_def.h Source File - GitHub Pages
30 #define UCS_S_MAY_ALIAS __attribute__((may_alias)) ... 147 #define ucs_prefetch(p) __builtin_prefetch(p).
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#21prefetch.6pp.pdf - Oregon State University
void __builtin_prefetch( void *, int rw, int locality ); mjb – March 30, 2019. 4. Computer Graphics. Prefetching in icc and icpc. #pragma prefetch a:0:8.
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#22__builtin_prefetch，它读多less？ Dovov编程网
__builtin_prefetch ，它读多less？ 我试图通过使用优化一些RK4 GCC C ++代码 __builtin_prefetch. 我在试图弄清楚如何预取一整堂课时遇到一些麻烦。 我不明白有多less ...
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#23Use __builtin_prefetch when expanding hash tables - HPCC
Use __builtin_prefetch when expanding hash tables. Log In. Export. XML Word Printable. Details. Type: Improvement. Status: Resolved.
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#24builtin-prefetch-1.c - Apple Open Source
Test that __builtin_prefetch does no harm. Prefetch using all valid combinations of rw and locality values. These must be compile-time constants.
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#25Chapter 2: V6 - Programming Parallel Computers
In GCC, we can use the builtin function __builtin_prefetch to give such hints. It is important to keep in mind that these hints will get translated into ...
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#26那个占着茅坑的线程 - Lequn Chen
我发现 __builtin_prefetch 被翻译成了 prefetcht0 指令。 42:cache-prefetching.cc **** std::lock_guard<std::mutex> lock(m_mutex); 5900 .loc ...
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#27[SOLVED] __builtin_prefetch - Lazarus Forum
I need C __builtin_prefetch analog. Any hint? It's simply called Prefetch. It will only have an effect on x86 (all three bitnesses), ...
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#28Is software prefetching (__builtin_prefetch) useful for ...
effectively telling the processor ahead of time that some data will be needed. Using the GCC and Clang compiler, you can invoke the __ ...
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#29include/linux/prefetch.h - Linux source code (v5.16.8) - Elixir ...
#ifndef ARCH_HAS_PREFETCH #define prefetch(x) __builtin_prefetch(x) #endif #ifndef ARCH_HAS_PREFETCHW #define prefetchw(x) __builtin_prefetch(x,1) #endif ...
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#30Linux內核中常用的C語言技巧 - 每日頭條
__builtin_prefetch (const void *addr, int rw, int locality)：主動進行數據預取，在使用地址addr的值之前就把其值加載到cache中，減少讀取的延遲， ...
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#316.46. Other built-in functions provided by GCC
when testing pointer or floating-point values. void__builtin_prefetch (const void *addr, ...) This function is used to minimize cache-miss latency by moving ...
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#32Bug 1249 - Protect __builtin_prefetch - Eigen
Hello, Eigen/src/Core/GenericPacketMath.h currently calls __builtin_prefetch with !EIGEN_COMP_MSVC as the only check.
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#33__builtin_prefetch()_chrysanthemumcao的专栏-程序员宅基地 ...
__builtin_prefetch () 是gcc 的一个内置函数。它通过对数据手工预取的方法，减少了读取延迟，从而提高了性能，但该函数也需要CPU 的支持。 该函数的原型为：
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#34test/Sema/builtin-prefetch.c - toolchain/clang - android Git ...
RUN: %clang_cc1 -fsyntax-only -verify %s. void foo() {. int a;. __builtin_prefetch(&a);. __builtin_prefetch(&a, 1);. __builtin_prefetch(&a, 1, 2);.
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#35预取示例？ - 菜鸟教程
将__builtin_prefetch指令替换为相应的内存访问会导致性能下降。 也就是说，我想用最短的例子来展示__builtin_prefetch，它执行的优化如果 ...
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#36算法优化的一些技巧 - 大专栏
void __builtin_prefetch (const void *addr, ...) This function is used to minimize cache-miss latency by moving data into a cache before it is accessed. You can ...
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#37gcc常用擴充功能 - 凛の魅力に溺死しろ
這邊我們主要介紹兩個功能，內建函式和屬性__attribute__。 ... void __builtin_prefetch(const void *ADDR, int RW, int LOCALITY) ：把ADDR預先載入 ...
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#38IV31742: BUILTIN_PREFETCH CAUSES 1540-0256 ERROR
APAR status. Closed as program error. Error description. PROBLEM DESCRIPTION: The builtin "__builtin_prefetch" is not declared correctly inside compiler.
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#39__builtin_prefetch _unbutun的博客-程序员秘密- 程序员秘密
All of these functions have corresponding versions prefixed with __builtin_ . GCC provides built-in versions of the ISO C99 floating point comparison macros ...
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#40Clang Language Extensions — Clang 15.0.0git documentation
#define __has_builtin(x) 0 // Compatibility with non-clang compilers. ... The __builtin_prefetch(addr, rw, locality) builtin is expected to be used to avoid ...
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#41Data Prefetch指令预取 - 知乎专栏
正是如此，编译器提供了prefetch预取指令（比如gcc提供的__builtin_prefetch），prefetch指令可以让主存提前将目标内存地址对应的数据所在的整个cache line从主存调 ...
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#42[#STDCXX-723] [gcc] use __builtin_prefetch to optimize string
We might be able to use the gcc __builtin_prefetch function in basic_string to give the hardware a hint when a string object's data is about ...
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#43How I Got 2x Speedup with One Line of Code - Naftali Harris
But surprisingly, I was able to do so by adding a single line using the __builtin_prefetch function in GCC and Clang.
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#44[笨叔点滴9] GNU GCC扩展2 - ITPub博客
__builtin_prefetch (const void *addr, int rw, int locality) ：主动进行数据预取，在使用地址addr 的值之前就把其值加载到cache 中了，减少读取的 ...
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#45数据预取__builtin_prefetch() - 极客分享
__builtin_prefetch () 是gcc 的一个内置函数。它通过对数据手工预取的方法，减少了读取延迟，从而提高了性能，但该函数也需要CPU 的支持。
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#46C語言內建函數：__builtin_XXX - 台部落
__builtin_prefetch (const void *addr, ...)；; __builtin_constant_p(exp);; __builtin_types_compatible_p(t1, t2);; __builtin_expect(exp, c);. # ...
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#47SLEPc - /usr/lib/gcc/x86_64-linux-gnu/9/include/xmmintrin.h
... I) \ 58 : __builtin_prefetch ((P), ((I & 0x4) >> 2), (I & 0x3)) 59 : #endif 60 : 61 : #ifndef __SSE__ 62 : #pragma GCC push_options 63 : #pragma GCC ...
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#48【文章推荐】数据预取__builtin_prefetch() - 码上快乐
原文：数据预取__builtin_prefetch(). builtin prefetch 是gcc 的一个内置函数。它通过对数据手工预取的方法，减少了读取延迟，从而提高了性能，但该函数也需要CPU 的 ...
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#49linux kernel gcc特性- EmMobLin - Google Sites
void __builtin_prefetch( const void *addr, int rw, int locality ); Linux 内核经常使用预抓取。通常是通过宏和包装器函数使用预抓取。清单6 是一个辅助函数示例， ...
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#50Go slower to execute due to cache misses - Getting Help - Go ...
Is there any API to prefetch buffer e.g. __builting_prefetch in gcc ? or compiler handle ... e.g. in gcc compiler is __builtin_prefetch(…) ...
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#51Compiler intrinsics | Microsoft Docs
The intrinsics are required on 64-bit architectures where inline assembly is not supported. Some intrinsics, such as __assume and __ ...
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#52Make your programs run faster by better using the data cache
For example, GCC and CLANG compilers offer __builtin_prefetch builtin that allows software prefetching. Here we give an example of binary ...
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#53Cache control instruction - Wikipedia
The GNU Compiler Collection intrinsic function __builtin_prefetch can be used to invoke this in the programming languages C or C++.
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#54那個占著茅坑不拉屎的線程 - GetIt01
不過有個讓我很困惑的事情： __builtin_prefetch 會把多少數據抓到Cache 裡面？GCC 文檔沒有說清楚。我發現 __builtin_prefetch 被翻譯成了 ...
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#55CompCert Release 15.10 - AbsInt
... result = __builtin_get_spr(spr) Returns the value of the special purpose register "spr" in "result" - __builtin_prefetch(ea,rw=0/1,ct=0/1/2) Data Cache ...
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#56Open vSwitch - Patchwork
Show patches with: Series = [ovs-dev,v2] include/openvswitch/compiler.h: add check for __builtin_prefetch using __has_builtin | State = Action Required ...
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#57__builtin_prefetch(x)的资料-bough22-ChinaUnix博客
其实就是一个for语句。 ... void __builtin_prefetch( const void *addr, int rw, int locality );. Linux 内核经常使用预抓取。通常是通过宏和包装器函数 ...
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#58How I Got a 2x Speedup With One Line of Code | Hacker News
And I find it funny when people on HN are shibeing __builtin_prefetch like "wow, I just heard about caches and prefetching data how amazing" ...
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#59gcc Built-in Functions - NACAD/COPPE-UFRJ
__builtin_sin __builtin_sinf __builtin_sqrt __builtin_sqrtf __builtin_strcmp __builtin_strlen __builtin_strncmp __builtin_abort __builtin_prefetch
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#60关于c ++：__ builtin_prefetch，它读多少？ | 码农家园
__builtin_prefetch, How much does it read? ... 我不知道如何预取整个结构。 我不明白读取了多少 const void *addr 。 我想加载 from 和 to 的下一个值。
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#61mm3dnow.h
#ifndef _MM3DNOW_H_INCLUDED #define _MM3DNOW_H_INCLUDED #ifdef __3dNOW__ #include ... __artificial__)) _m_prefetch (void *__P) { __builtin_prefetch (__P, 0, ...
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#62Use GCC __builtin_prefetch() to implement prefetch().
[(sh-2.6)] sh: Use GCC __builtin_prefetch() to implement prefetch(). ; [email protected] (mailing list ...
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#63预取示例？ - gcc
用相应的内存访问替换 __builtin_prefetch 指令会导致性能下降。 也就是说，我想要最短的例子显示 __builtin_prefetch 执行一个没有它就无法管理的优化。
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#64Re: Experimenting with hash join prefetch - PostgreSQL
+ __builtin_prefetch(&hashtable->buckets.unshared[next_bucket]); > > > +1, I also think that we should use __builtin_prefetch these days ...
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#65GNU built-in functions - Compiler User Guide - Keil
__builtin_ffs(); __builtin_ffsl(); __builtin_ffsll(); __builtin_frame_address(); __builtin_offsetof(); __builtin_prefetch(); __builtin_return_address() ...
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#66Other Built-in Functions Provided by GCC - Fedora
Built-in Functionvoid__builtin_prefetch(constvoid*``addr``,...)This function is used to minimize cache-miss latency by moving data into a cache before it is ...
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#67Use GCC __builtin_prefetch() to implement prefetch (V2)
GCC's __builtin_prefetch() was introduced a long time ago, all supported GCC versions have it. So this patch removes the ARCH_HAS_PREFETCH and ...
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#68On Intel CPU Skylake and newer __builtin_prefetch doesn't ...
On Intel CPU Skylake and newer __builtin_prefetch doesn't need to be protected with a null check #67 ; $ gcc -march=skylake -dM -E - < /dev/null | grep -i ...
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#69gcc Built-in Functions
__builtin_sin __builtin_sinf __builtin_sqrt __builtin_sqrtf __builtin_strcmp __builtin_strlen __builtin_strncmp __builtin_abort __builtin_prefetch
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#70How could one make this search more cache friendly?
... else { // __builtin_prefetch(&slice[it + ((len - it) / 2)], 0, ... (_, Some(position)) => return Some(it + position), _ => return None, } } } }.
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#71Why doesn't __builtin_prefetch have any effect here?
On the line c = *ptr , cachegrind records 632,378 DLmr (L3 cache miss) when __builtin_prefetch is not set. What's weird though, is that this value does not ...
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#72c++ - __builtin_prefetch, Combien lit-il? - AskCodez
__builtin_prefetch, Combien lit-il? Je suis en train d'optimiser certains RK4 GCC C++ code à l'aide de __builtin_prefetch.
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#73simd_define.h - Silk Road
#ifndef SIMD_DEFINE #define SIMD_DEFINE #ifndef __USE_GNU #define __USE_GNU ... __m128 v4sf; typedef __m128i v4si; // SSE #define __builtin_prefetch(p,rw,i) ...
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#74adding locality levels to prefetch# and friends (#8256) · Issues
currently in HEAD / 7.7, the prefetch primop only does the equivalent of __builtin_prefetch(ptr,0,3) (0 here denoting a read prefetch, 3 denoting "high ...
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#75Question : How to #ifdef the __builtin_prefetch function
Since __builtin_prefetch() accepts a variable number of arguments, you might want to adapt the above to use variadic macros (C99 and later) - if you use it with ...
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#76LLVM編譯器中的內置(builtin)函數 - 程式前沿
在一些.h頭文件中或者實現代碼中經常會看到一些以__builtin_開頭的函數 ... 而__builtin_prefetch函數就是用來將某個內存中的數據預先加載或寫入到 ...
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#77Implement prefetch on ARM64. Do not clobber cc on ARM32.
__builtin_prefetch tends to do nothing on ARM64 compilers because the. // prefetch instructions there are too detailed for ...
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#78如何在我的C代码中使用PREFETCHT0指令？ | 经验摘录
__builtin_prefetch (const void*). 这将使用目标的预取指令生成代码,但编译器可以更好地了解它. 作为内联ASM和gcc内置函数之间差异的一个简单示例, ...
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#796.45. Other built-in functions provided by GCC - Linuxtopia
void__builtin_prefetch (const void *addr, ...) This function is used to minimize cache-miss latency by moving data into a cache before it is accessed.
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#80gcc optimization/intrinsics - mersenneforum.org
__builtin_prefetch (__P, (__I & 0x4) >> 2, __I & 0x3); ... error: third argument to '__builtin_prefetch' must be a constant
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#81LLVM編譯器中的內建(built-in)函式 - IT人
在一些.h標頭檔案中或者實現程式碼中經常會看到一些以__builtin_開頭的函 ... 而__builtin_prefetch函式就是用來將某個記憶體中的資料預先載入或寫入 ...
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#82Re: [PATCH v2 01/17] xen: x86 & generic
#ifndef ARCH_HAS_PREFETCH > -#define ARCH_HAS_PREFETCH > -static inline void prefetch(const void *x) {;} > +#define prefetch(x) __builtin_prefetch(x) ...
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#83Linux内核中的九个技巧 - 尚码园
GCC 经过内置函数__builtin_prefetch 支持数据的手工预抓取。在须要数据以前，使用这个函数把数据放到缓存中。以下所示，__builtin_prefetch
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#84Prefetching Examples? - py4u
Replacing the __builtin_prefetch instruction with the corresponding memory access results in performance degradation. That is, I want the shortest example ...
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#85Lecture 10 - Google Slides
void __builtin_prefetch(const void* address). Available on all architectures. With -fprefetch-loop-arrays option GCC tries to insert prefetch instructions ...
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#86_builtin_prefetch（）中第二个参数的作用是什么？ | 码农 ...
__builtin_prefetch (&x,1,2); __builtin_prefetch(&x,0,2); __builtin_prefetch(&x,0,1); __builtin_prefetch(&x,0,0); 上面是生成的示例代码：
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#87Put It Altogether! : Matrix Multiplication with libdispatch + ...
__builtin_prefetch (m2+ofs+ofs2); } ofs = 0; for(int y = 0; y < 8; y++, ofs+=p1){ float8 vm1 = *((float8*)(m1+ofs+idx));
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#88Software prefetching in C/C++ | Yunming Zhang's Blog
You can insert calls to __builtin_prefetch into code for which you know addresses of data in memory that is likely to be accessed soon. If the ...
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#89_builtin_prefetch（）中第二个参数的影响是什么？ - Thinbug
GCC doc here指定_buitin_prefe. ... __builtin_prefetch(&x,1,2); __builtin_prefetch(&x,0,2); __builtin_prefetch(&x,0,1); __builtin_prefetch(&x,0,0);.
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#90Can I control what gets copied into CPU cache in C++? - Stackify
With gcc you use __builtin_prefetch . Likewise, VC++ on an ARM provides a __prefetch intrinsic for the same purpose (no, I really don't know why they ...
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#91PrefetchT0 - Intel Communities
Hello Madhav,. I don't know what gcc __builtin_prefetch() uses. I would have to use it in some code and then disassemble the code to be sure what it uses.
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#92[Turn] Introduction to the __builtin_ function of gcc
uint32_t __builtin_bswap32 (uint32_t x): Reverse x by byte and return the reversed result. __builtin_prefetch (const void *addr, ...): It manually prefetches ...
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#93Felix Schwarz в Twitter: "TIL about __builtin_prefetch() and got ...
TIL about __builtin_prefetch() and got a nice speed bump applying it to a performance critical routine. 11:01 ч. пр.об. · 1.09.2016 г.
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#94gcc __builtin_prefetch cache usage help request - Raspberry ...
1) I assume cache is loaded in lines of 32 bytes? gcc does no calculation on struct size so I have to call __builtin_prefetch with offset of ...
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#95Linux 内核中的GCC 特性 - 阿里云开发者社区
GCC 通过内置函数 __builtin_prefetch 支持数据的手工预抓取。在需要数据之前，使用这个函数把数据放到缓存中。如下所示， __builtin_prefetch 函数 ...
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#96Re: [問題] 為何公認fortran速度略快於C ? - 看板C_and_CPP
... 作這個最佳化，看[1] 這邊有兩個C 的加速手段[1] http://tinyurl.com/dygwpb __restrict__ [2] http://tinyurl.com/d55t9f __builtin_prefetch 只 ...
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#97奔跑吧 Linux内核 入门篇 - Google 圖書結果
< include / linux / prefetch.h > #define prefetch ( x ) __builtin_prefetch ( x ) #define prefetchw ( x ) __builtin_prefetch ( x , 1 )下面是使用 prefetchO ...
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#98Pro Android Apps Performance Optimization
To preload data, you can use: GCC's __builtin_prefetch() PLD and PLDW ARM instructions in assembly code You can also use the PLI ARM instruction (ARMv7 and ...
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#99Matters Computational: Ideas, Algorithms, Source Code
The following list is taken from [147]: int int int int int __builtin_ffs ... Two more useful built-ins are: void __builtin_prefetch (const void *addr, .
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#100Recent Advances in Parallel Virtual Machine and Message ...
We use a special gcc function __builtin_prefetch to issue these prefetch instructions. A special flag, –mcpu, has to be set to compile MPI source code.