Write-back/through method?

I have no idea what that means?I think ,it's about CPU!?

I searched in Mike Meyers book,5th edition and I didn't find anything about it.

Write back/through-found it in the test on this site.

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Comments

aznluvsmc

This has to do with caching methods of the CPU. In a write-back cache, the CPU will swap the data between it's L1/L2 cache and RAM. In a
write-through cache, the CPU will swap the data with a permanenet storage medium instead such as a hard drive. Hence it is writing through the RAM to get to the hard drive.

Write-back example:

CPU L1/L2 cache

> RAM Hard drive

Write through example:

CPU L1/L2 cache

RAM

> Hard drive

= data
> = point of write

rono

ok..thank you!

Nice and simple explanation!

dcgreen7

Write Through cache sends data directly to RAM, even if it means being delayed by a wait state. Write Back cache stores data and writes it to RAM later. (Meyers 4th edition, pages 109-110) Both types work with the CPU's L1 or L2 cache.

Neither has anything to do with virtual memory.

Dave