Messages in this thread | | | Date | Wed, 25 Jul 2007 01:07:25 -0700 (PDT) | From | david@lang ... | Subject | Re: -mm merge plans for 2.6.23 |
| |
On Wed, 25 Jul 2007, Rene Herman wrote:
> On 07/25/2007 06:46 AM, david@lang.hm wrote: > >> you could make a synthetic test by writing a memory hog that allocates 3/4 >> of your ram then pauses waiting for input and then randomly accesses the >> memory for a while (say randomly accessing 2x # of pages allocated) and >> then pausing again before repeating > > Something like this? > >> run two of these, alternating which one is running at any one time. time >> how long it takes to do the random accesses. >> >> the difference in this time should be a fair example of how much it would >> impact the user. > > Notenotenote, not sure what you're going to show with it (times are simply as > horrendous as I'd expect) but thought I'd try to inject something other than > steaming cups of 4-letter beverages.
when the swap readahead is enabled does it make a significant difference in the time to do the random access?
if it does that should show a direct benifit of the patch in a simulation of a relativly common workflow (startup a memory hog like openoffice then try and go back to your prior work)
David Lang
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |