Recent questions tagged Memory

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memory - Test for void pointer in C++ before deleting

I have an array in C++: Player ** playerArray; which is initialized in the constructor of the class it is in. ... anyone know how to do this? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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memory - In C++, why is `new` needed to dynamically create an object rather just allocation?

I've got this trivial class hierarchy: class Base { public: virtual int x( ) const = 0; }; class Derived : ... my objects. Are my hopes right? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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memory leaks - finding reason for EXC_BAD_ACCESS - in Xcode4

I get an EXC_BAD_ACCESS error at a place that doesn't have anything to do with the root cause. I fortunately ... will haunt me somewhere else) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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memory management - Where is the OutOfMemoryError object created in Java

An OutOfMemoryError occurs when the heap does not have enough memory to create new objects. If the heap does ... understand this, please advise. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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memory - Using Realloc in C

Its really a post for some advice in terms of the use of realloc, more specifically, if I could make use of it ... reverse(buffer); return 0; } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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memory management - Linux over commit heuristic

The over commit article from the kernel doc just mentions that over commit mode 0 is based on heuristic over ... kernel sources works too ! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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memory - C Storage-class differences?

What is the difference between a variable declared as an auto and static? What is the difference in allocation ... what is its significance? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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memory leaks - Does deallocating a Fortran derived type automatically deallocate member arrays and pointers as well?

In Fortran, if I have an allocatable array of derived types, each consisting of a pointer and an allocatable array, ... me a few lines of code. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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memory management - Javascript nested function performance

I have some nested functions such as var freak = function() { var die = function() { ... } die ... nested functions should be avoided entirely? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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memory alignment - CUDA kernel launch fails when using various offsets into input data

My code is giving an error message and I am trying to track down the cause of it. To make it easier to ... an explanation. What is the deal? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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memory management - when does c++ allocate/deallocate string literals

When is the string literal "hello" allocated and deallocated during the lifetime of the program in this example? init(char ... s); return 0; } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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memory - how to get the min and max heap size settings of a JVM from within a Java program

How to get the min and max heap size settings of a VM from within a Java program? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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memory - Out of String Space in Visual Basic 6

We are getting an error in a VB6 application that sends data back and forth over TCP sockets. We get a ... thoughts would be helpful as well. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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memory management - When am I supposed to use del in python?

So I am curious lets say I have a class as follows class myClass: def __init__(self): parts = 1 to = ... variables be managed by the scope? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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memory management - CUDA allocating array of arrays

I have some trouble with allocate array of arrays in CUDA. void ** data; cudaMalloc(&data, sizeof(void**)*N); ... is thrown } What did I wrong? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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memory management - Location of pointers and global variables in C

Where are pointers and global variables stored in C? Are they saved in the memory, heap or stack? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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488 views

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memory - MPI Fortran code: how to share data on node via openMP?

I am working on an Fortan code that already uses MPI. Now, I am facing a situation, where a set of data ... this is already done via MPI. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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memory management - android:largeHeap="true" convention?

I'm writing an image gallery app and I keep running into out of memory errors. I cache all my ... candidate for largeHeap setting? Thanks See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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memory management - clearing or set null to objects in java

I was recently looking into freeing up memory occupied by Java objects. While doing that I got confused about how ... deep copy happens in Java? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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memory - How can I load large files (~150MB) in MATLAB?

I have a large MATLAB file (150MB) in matrix form (i.e. 4070x4070). I need to work on this file ... exhausted from dealing with this problem. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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memory address positive or negative value in c?

in c, i tried to print out address of variable and address of some function. I got one is negative ... Here is result: -1075908992 134513684 See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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356 views

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memory - Is data really copied four times in R's replacement functions?

Consider this variable a = data.frame(x=1:5,y=2:6) When I use a replacement function to change the ... -.data.frame [<- change_first_element<- See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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memory - java - How can Garbage Collector quickly know which objects do not have references to them any more?

I understand that in Java, if an object doesn't have any references to it any more, the garbage collector will ... of references an object has? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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481 views

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memory - Variable size arrays in Fortran without Allocate()

Is there a way to create variable size arrays in Fortran on the stack? Allocate() does not work for me, ... is done in a block construct. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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memory management - What is the difference between delete and calling destructor in C++

As stated in the title, here is my code: class Foo { public: Foo (int charSize) { str = new char[charSize]; } ~ ... ; foo->~Foo(); return 0; } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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583 views

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memory management - /proc/$pid/maps shows pages with no rwx permissions on x86_64 linux

/proc/$pid/maps shows pages with no rwx permissions on x86_64 Linux. I noticed that when I read /proc/$pid/maps at ... -3.2.7.so please advise. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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605 views

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memory management - What is the size of bitset in C++

I want to know how bitset actually allocates memory. I read from some blog that it takes up memory in bits. However ... space in bits in C++? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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memory management - How to get the physical address from the logical one in a Linux kernel module?

Is there any suitable way to get the physical address by the logical one except to walk through page ... follow_page functionality by hand. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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