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Why does free() leaves stuff in memory?


Why does free() leaves stuff in memory?

By : JensO
Date : October 21 2020, 06:10 PM
help you fix your problem The memory management software you are using uses the memory released by free for its own purposes. It needs data to organize the blocks of memory that are available for allocation, and using the memory released by free is a convenient way to do that.
How the memory is used, and whether it is used, is implementation-specific. One implementation may use the freed memory in one way, while another implementation uses it in another way, and a third implementation might not use the freed memory at all, at least for certain sizes of blocks. For example, blocks of a certain fixed size might be tracked by a bitmap maintained elsewhere, possibly using different bitmaps for different fixed sizes.
code :


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How can I use a regular expression to match something in the form 'stuff=foo' 'stuff' = 'stuff' 'more stuff'

How can I use a regular expression to match something in the form 'stuff=foo' 'stuff' = 'stuff' 'more stuff'


By : Jeff MacDonald
Date : March 29 2020, 07:55 AM
Does that help Actually I wouldn't use a regex for that at all. Assuming your language has a split operation, I'd first split on the | character to get a list of:
code :
'51NL9637X33'
'ISL6262ACRZ-T'
'QFN'(~51NL9637X33) = '51NL9637X33'
'ISL6262ACRZ-T'
'INTERSIL'
'QFN7SQ-HT1_P49'
'()'
'51NL9637X33'           <null>
'ISL6262ACRZ-T'         <null>
'QFN'(~51NL9637X33)     '51NL9637X33'
'ISL6262ACRZ-T'         <null>
'INTERSIL'              <null>
'QFN7SQ-HT1_P49'        <null>
'()'                    <null>
ImageView leaves a lot of free space

ImageView leaves a lot of free space


By : Peter Lacher
Date : March 29 2020, 07:55 AM
Any of those help It's happen because of ImageView auto detect the width and height of real image
However , the width is not enough, so the ImageView auto resize the image to fit for it's width
code :
android:adjustViewBounds="true"
My server's total memory doesn't match with USED + FREE memory. I'm using linux free command

My server's total memory doesn't match with USED + FREE memory. I'm using linux free command


By : Trap26
Date : March 29 2020, 07:55 AM
will help you I'm not really sure what's happening with my memory. I have 31G total of memory, used is 1G, and free is 9G.
code :
buff/cache: 21114
Angular Renderer2 remove listener leaves EventListeners in memory - memory leak?

Angular Renderer2 remove listener leaves EventListeners in memory - memory leak?


By : user2008683
Date : March 29 2020, 07:55 AM
I hope this helps you . Hmmm... it seems you're running Angular in dev mode. Your EventListeners may be attached to Angular's DebugElement. If you are creating and removing nodes using Renderer2 you might also notice that all your Detached HTMLElements are retained in memory.
Don't worry too much because this all disappears in prod mode.
Why Linux Free command is not showing less free memory when I run a process which keeps on allocating memory

Why Linux Free command is not showing less free memory when I run a process which keeps on allocating memory


By : aboud
Date : March 29 2020, 07:55 AM
should help you out When you call malloc it in turn requests memory from the kernel (via sbrk or mmap) and the OS just casually gives it the memory, without actually allocating it for the process. This is an optimistic strategy; in effect the OS "hopes" the process will never even use the memory.
When the process eventually writes (or reads) from the memory, it faults and the OS says "ok FINE, if you insist" and actually allocates the memory.
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