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How to disable cache effect

How to disable cache effect# CS - 计算机科学

f*h2004-05-23 07:05

1 楼

大家做performance study时，怎么disable OS caching effect?
Thx!

f*r2004-05-23 07:05

2 楼

What do you meaning? For model, simulation or implementation?

【在 f*******h 的大作中提到】

: 大家做performance study时，怎么disable OS caching effect?
: Thx!

f*h2004-05-23 07:05

3 楼

For Simulation and performance study.
I want to know the cost of an algorithm, which has I/Os.

【在 f*****r 的大作中提到】

: What do you meaning? For model, simulation or implementation?

f*r2004-05-23 07:05

4 楼

So you use a simulator, right? Just change the simulator's configuration
parameter(such as, set cache size as 0) or change the code.

【在 f*******h 的大作中提到】

: For Simulation and performance study.
: I want to know the cost of an algorithm, which has I/Os.

f*h2004-05-23 07:05

5 楼

Or to change the code to disable file caching?
Whenever you open a file, that file will be quickly cached in Linux.
I can remount the data drive before I run the program, but after the
program starts, caching starts again.

【在 f*****r 的大作中提到】

: So you use a simulator, right? Just change the simulator's configuration
: parameter(such as, set cache size as 0) or change the code.

f*r2004-05-23 07:05

6 楼

If you use Linux, just check direct IO and raw IO stuffs. I guess that direct
IO can work. But in fact, there are several layer caching for IO. Anyway, you
can't disable disk drive(raid controller, if any)'s caching/prefetching.

【在 f*******h 的大作中提到】

: Or to change the code to disable file caching?
: Whenever you open a file, that file will be quickly cached in Linux.
: I can remount the data drive before I run the program, but after the
: program starts, caching starts again.