f*******h
发帖数: 1269 | 1 大家做performance study时， 怎么disable OS caching effect?
Thx! | f*****r
发帖数: 229 | 2 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*******h
发帖数: 1269 | 3 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*****r
发帖数: 229 | 4 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*******h
发帖数: 1269 | 5 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*****r
发帖数: 229 | 6 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.
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