I just learned that it's possible to increase the size of the memory you'll allocate to a struct when using the malloc function. For example, you can have a struct like this: struct test{ char a; int v[1]; char b; }; Which clearly has space for only 2 chars and 1 int (pointer to an int in reality, but anyway). But you could call malloc in such a way to make the struct hold
我刚刚了解到，使用malloc函数时可以增加分配给结构的内存大小。 例如，你可以有这样的结构： struct test{ char a; int v[1]; char b; }; 其中显然只有2个字符和1个int的空间（实际上指向int，但无论如何）。 但是你可以通过这种方式调用malloc来使结构体拥有2个字符和任意数量的整数（比如10）： int main(){ struct test *ptr; ptr = malloc (sizeof(struct test)+sizeof(int)*9); ptr->v[9]=
Suppose I allocate some memory. char* buffer = (char*)my_malloc(2062); I assign char values to the first 14 bytes from a previously defined array named header. memcpy(buffer, header, 14); Then I want to treat the rest of the allocated space as pointers to float. float* float_buffer = (float*)(buffer + 14); some_function(float_buffer); Then at some point later on I need to send all the data
假设我分配了一些内存。 char* buffer = (char*)my_malloc(2062); 我将char值分配给先前定义的数组名称头中的前14个字节。 memcpy(buffer, header, 14); 然后我想把剩下的分配空间当作指针来浮动。 float* float_buffer = (float*)(buffer + 14); some_function(float_buffer); 然后在稍后的某个时刻，我需要发送所有数据。 transmit(buffer); my_free(buffer); 这是治疗记忆的正确方法吗？ 浮球*投射好吗？ 我遇到的
I'm not sure exactly what I need to use as an argument to malloc to allocate space in the table_allocate(int) function. I was thinking just count_table* cTable = malloc(sizeof(count_table*)) , but that doesnt do anything with the size parameter. Am i supposed to allocate space for the list_node_t also? Below is what I am working with. in the .h file I'm given this signature: //crea
我不确定我需要用什么作为malloc的参数来分配table_allocate（int）函数中的空间。 我只是想count_table * cTable = malloc（sizeof（count_table *）），但是这并不对size参数做任何事情。 我应该为list_node_t分配空间吗？ 以下是我正在处理的内容。 在.h文件中我给出了这个签名： //create a count table struct and allocate space for it //return it as a pointer
In the below link, answer given by Sdaz MacSkibbons gives a brief overview of process address space on virtual address systems. What happens when a computer program runs? Now suppose every process gets 4GB virtual address space. Now does that mean that the top addresses of this virtual address space will get stack part (Suppose stack address starts from 0) and address space from bottom will
在下面的链接中，Sdaz MacSkibbons给出的答案简要介绍了虚拟地址系统上的进程地址空间。 计算机程序运行时会发生什么？ 现在假设每个进程都获得4GB的虚拟地址空间。 现在这是否意味着这个虚拟地址空间的顶部地址将会得到堆栈部分（假设堆栈地址从0开始），并且从底部开始的地址空间将被分配给文本，数据，全局变量和堆。 由于堆的大小发生变化，新的malloc分配会将虚拟地址空间页面直接映射到实际内存，还是会检查以前分配
Confused by private bytes! Currently analysing the memory usage of our C# .NET application with ANTS profiler. Here are our findings taken after start-up with the main form visible on screen. No other functionality has been used. Gen 0 Heap - 5.8MB Gen 1 Heap - 2.5MB Gen 2 Heap - 13.9MB Bytes in all Heaps - 17MB Large Object Heap - 0.7MB Private Bytes - 130MB Working Set - 150MB
私人字节混淆！ 目前使用ANTS分析器分析我们的C＃.NET应用程序的内存使用情况。 以下是我们的调查结果，在启动后可以在屏幕上看到主窗体。 没有使用其他功能。 Gen 0堆 - 5.8MB 第一代堆 - 2.5MB 第二代堆 - 13.9MB 所有堆中的字节 - 17MB 大对象堆 - 0.7MB 私人字节 - 130MB 工作集 - 150MB 如果所有堆中的字节只有17MB，为什么我们有这么大的专用字节分配？ 私有字节是由系统分配还是专用字节从零
I'm trying to measure the memory usage for a code and process using Process.privateBytes and Process.workingSet but if i run the application several time, each time i have different values ? What is the accurate way to have ~same values each times ? Process.privateBytes is an Approximation and unless the code in question and in the process has nothing but a Thread.Sleep() for all the thre
我正在尝试使用Process.privateBytes和Process.workingSet来测量代码和进程的内存使用情况，但是如果我多次运行该应用程序，那么每次有不同的值时？ 什么是准确的方法每次都有相同的值？ Process.privateBytes是一种近似值 ，除非有问题的代码和进程中的代码对于它产生的所有线程都只有一个Thread.Sleep（），否则这些值必然会发生变化（依赖消耗的内存+ GC） 另请参阅什么是专用字节，虚拟字节，工作集？ 如果您需要从
I recently discovered Areas in ASP.NET MVC 4, which I have successfully implemented, but I'm running into troubles with the @Html.ActionLink helper in my Razor views. The URL this helper generates always seems to be relative to the URL of the current page. I have my web site configured in IIS 7 (Win7) as an Application virtual directory at /Foo . I have two Areas registered: Admin and Bl
我最近在ASP.NET MVC 4中发现了我已经成功实现的区域，但是我在Razor视图中遇到了@Html.ActionLink助手的麻烦。 这个助手生成的URL似乎总是相对于当前页面的URL。 我在IIS 7（Win7）中将我的网站配置为/Foo的应用程序虚拟目录。 我注册了两个区域：管理员和博客。 我有AdminAreaRegistration.cs和BlogsAreaRegistration.cs文件中的默认代码。 我将namespaces = new[] { "MvcProject.Controllers" }到默认RouteC
i have a problem getting token from google api, first i make this request to get code from google accounts.google.com/o/oauth2/auth?scope=www.googleapis.com/auth/userinfo.profile www.googleapis.com/auth/userinfo.email&state=profile&redirect_uri={http://pedidostogo.com/Login.aspx}&response_type=code&client_id=519970867780.apps.googleusercontent.com&access_type=offline
我有一个从谷歌API获取令牌的问题，首先我提出这个请求从谷歌获取代码 accounts.google.com/o/oauth2/auth?scope=www.googleapis.com/auth/userinfo.profile www.googleapis.com/auth/userinfo.email&state=profile&redirect_uri={http://pedidostogo.com/Login.aspx}&response_type=code&client_id=519970867780.apps.googleusercontent.com&access_type=offline 这似乎是工作正常（即时从谷歌获
I've now been able to get perf to capture a user-space stack`, but I'm not sure how to convince it to capture values passed by reference as pointers, or to snapshot globals of interest. Specifically, I'm trying to analyse the system-wide performance of PostgreSQL under various loads with and without a performance related patch. One of the key things I need to be able to do is tell
我现在已经能够获得perf来捕获用户空间栈了，但我不确定如何说服它捕获通过引用传递的值作为指针，或者捕获感兴趣的全局快照。 具体来说，我试图分析PostgreSQL在各种负载下的系统级性能，有无性能相关补丁。 我需要做的关键事情之一是告诉哪些查询与内核中的哪些块I / O请求相关联。 perf记录了pid和用户空间堆栈，它们有时包含current_query ，但由于它是一个字符串，因此它被传入，所以我得到的只是一个不透明的指针。
I'm currently trying to track down some phantom I/O in a PostgreSQL build I'm testing. It's a multi-process server and it isn't simple to associate disk I/O back to a particular back-end and query. I thought Linux's perf tool would be ideal for this, but I'm struggling to capture block I/O performance counter metrics and associate them with user-space activity. It'
我目前正在试图追踪我正在测试的PostgreSQL版本中的一些幻像I / O。 这是一个多进程服务器，将磁盘I / O与特定的后端和查询关联起来并不简单。 我认为Linux的perf工具对此非常理想，但我努力捕获块I / O性能计数器指标并将它们与用户空间活动相关联。 记录块I / O请求和完成很容易，例如： sudo perf record -g -T -u postgres -e 'block:block_rq_*' 并且用户空间pid被记录下来，但是没有捕获到内核或用户空间堆栈，或者