Structure Packing in C

C Programming: Structure Packing in C Programming.
Topics discussed:
1) Structure Packing.
2) The need for Structure Packing.

Music:
Axol x Alex Skrindo - You [NCS Release]

#CProgrammingByNeso #CProgramming #StructuresInC #StructurePacking #Structure&Union

[shashankgaur]

First view...
I was totally unaware of this concept so thank you neso academy

[VishalMishra-jxgs]

sir please make video for all the subject

[hemasundarkasturi]

thank you a lot for sharing the knowledge 😊😊

[oksowhat]

sir as in previous example where 12bytes were used and 3cpu cycles then still if we did't used padding then the fisrt char will use 1 byte 2nd int will use next 3 bytes of first word and 1 byte in 2nd word and 3rd char will use 1 byte in 2nd word, total of 2 cycle being used, this is inefficient

[johnh]

You should still study your target architectures and not take all structure padding as bad ... most modern processor ISA's implement a "barrel shifter" to make fetch and put single cycle operations which based on structure types and order sometimes can't help but have some padding ... Binary packing is another technique to be studied that focuses at the byte shifting .. great for implementing protocols and working within the bounds of CPU caches

[sivaramakrishna]

The teaching about structure in detail is excellent. Can you please explain the #pragma directive in detail

[veeraloganathanvvs]

If I need both and optimise code means! What we have to do. ? Structure should be properly ordering?

[jeedikantivenkat]

First view
First like
First comment❤

Enough for the day ..

Sir please provide videos on data structures .

[varunsaigs]

Then what is the size of that var in 62 bites architecture??

[joel_b]

Great video as always! Your videos save me so much time. Thanks a lot.

[ankammaraochintala]

Thank you sir, for your knowledge transfer

[vinayakgujjar]

Nice one, bur was not as clear as structure padding video. Concern is how processor modulates its data accessing from 8bytes at a time to 6bytes.

[Cat_Sterling]

Thank you so much, had no idea that it could be done!

[peasant]

why not put low byte data types in front of high byte ones when you construct struct

[gsravan]

But how pragma will work internally?? I want to know about internal process of pragma

[AamirKhan-dehg]

What will be the output of this program ??

[tech-helpbuddy]

sir, but In 64 bit architecture 1 word =8 byte so without pragma pack it should be 8 na for char, int, char

[deviganeshan]

Sir... Pls update videos in operating system

[yogeshmhanta]

How many wastage of cpu cycles in a above program.

[suhanibohra]

is it always recommended to pack structures?