eth-janishutz/eth-summaries
1
0
Fork 0
mirror of https://github.com/janishutz/eth-summaries.git synced 2026-03-14 10:50:05 +01:00
Code Issues Packages Projects Releases Wiki Activity

[SPCA] Virtual memory, Caches updated

Browse Source
This commit is contained in:
Janis Hutz
2026-01-24 15:04:32 +01:00
parent 28fb91c42d
commit ff86cef50c
17 changed files with 319 additions and 108 deletions
Download Patch File Download Diff File Expand all files Collapse all files

69
semester3/spca/parts/03_hw/03_caches/00_intro.tex Normal file
View File

@@ -0,0 +1,69 @@
\subsection{Caches}
Processors generally improve quicker than memory speed does. Therefore, optimizing memory is necessary, and caches are one such method.
\inlineex The importance of caches can quickly be seen when looking at the memory hierarchy:
\begin{tabular}{llllll}
\toprule
\textbf{Cache type} &
\textbf{What is cached?} &
\textbf{Where is it cached?} &
\textbf{Latency (cycles)} &
\textbf{Managed by} \\
\midrule
Registers &
4/8-byte words &
CPU core &
0 &
Compiler \\
TLB &
Address translations &
On-chip TLB &
0 &
Hardware \\
L1 cache &
64-byte blocks &
On-chip L1 &
1 &
Hardware \\
L2 cache &
64-byte blocks &
On-chip L2 &
10 &
Hardware \\
Virtual memory &
4\,kB page &
Main memory (RAM) &
100 &
Hardware + OS \\
Buffer cache &
4\,kB sectors &
Main memory &
100 &
OS \\
Network buffer cache &
Parts of files &
Local disk, SSD &
1{,}000{,}000 &
SMB/NFS client \\
Browser cache &
Web pages &
Local disk &
10{,}000{,}000 &
Web browser \\
Web cache &
Web pages &
Remote server disks &
1{,}000{,}000{,}000 &
Web proxy server \\
\bottomrule
\end{tabular}