Answer by Ciro Santilli 新疆改造中心法轮功六四事件 for maximum memory which malloc can...
/proc/sys/vm/overcommit_memory controls the maximum on Linux On Ubuntu 19.04 for example, we can easily see that malloc is implemented with mmap(MAP_ANONYMOUS by using strace. Then man proc then...
View ArticleAnswer by Swapnil for maximum memory which malloc can allocate
when first time you allocate any size to *p, every next time you leave that memory to be unreferenced. That means at a time your program is allocating memory of 4 bytes only . then how can you thing...
View ArticleAnswer by human.js for maximum memory which malloc can allocate
Try this #include <stdlib.h> #include <stdio.h> main() { int Mb = 0; while (malloc(1<<20)) ++Mb; printf("Allocated %d Mb total\n", Mb); } Include stdlib and stdio for it. This extract...
View ArticleAnswer by mav_2k for maximum memory which malloc can allocate
As per C90 standard guarantees that you can get at least one object 32 kBytes in size, and this may be static, dynamic, or automatic memory. C99 guarantees at least 64 kBytes. For any higher limit,...
View ArticleAnswer by Sebastian for maximum memory which malloc can allocate
I know this thread is old, but for anyone willing to give it a try oneself, use this code snipped #include <stdlib.h> int main() { int *p; while(1) { int inc=1024*1024*sizeof(char); p=(int*)...
View ArticleAnswer by mdma for maximum memory which malloc can allocate
malloc does its own memory management, managing small memory blocks itself, but ultimately it uses the Win32 Heap functions to allocate memory. You can think of malloc as a "memory reseller". The...
View ArticleAnswer by Alex Martelli for maximum memory which malloc can allocate
I read that the maximum memory malloc can allocate is limited to physical memory (on heap). Wrong: most computers/OSs support virtual memory, backed by disk space. Some questions: does malloc allocate...
View ArticleAnswer by Chris Cooper for maximum memory which malloc can allocate
I don't actually know why that failed, but one thing to note is that `malloc(4)" may not actually give you 4 bytes, so this technique is not really an accurate way to find your maximum heap size. I...
View Articlemaximum memory which malloc can allocate
I was trying to figure out how much memory I can malloc to maximum extent on my machine (1 Gb RAM 160 Gb HD Windows platform). I read that the maximum memory malloc can allocate is limited to physical...
View ArticleAnswer by Graham Toal for Maximum memory which malloc can allocate
I use the MemAvailable parameter in /proc/meminfo on Linux to make an initial estimate of the free RAM then use a binary chop to confirm. My intention is to determine the largest physical RAM that I...
View ArticleAnswer by Mikko Rantalainen for Maximum memory which malloc can allocate
Does malloc allocate memory from HD also?Implementation of malloc() depends on libc implementation and operating system (OS). Typically malloc() doesn't always request RAM from the OS but returns a...
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