Displaying 2 results from an estimated 2 matches for "arrry".
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2012 Jan 05
13
[PATCH] xenpaging:add a new array to speed up page-in in xenpaging
...n in xenpaging
This patch adds a new array named page_out_index to reserve the victim''s index.
When page in a page,it has to go through a for loop from 0 to num_pages to find
the right page to read,and it costs much time in this loop.After adding the
page_out_index array,it just reads the arrry to get the right page,and saves much time.
The following is a xenpaging test on suse11-64 with 4G memories.
Nums of page_out pages Page out time Page in time(in unstable code) Page in time(apply this patch)
512M(131072) 2.6s 540s 530s
2G(524288) 15.5s...
2012 Jan 05
3
[PATCH 0 of 2] xenpaging:speed up page-in
The following two patches are about how to speed up in xenpaging when page in pages.
On suse11-64 with 4G memory,if we page out 2G pages,it will cost about 15.5 seconds,
but take 2088 seconds to finish paging in.If page-in costs too much time,it will cause
unmesurable problems when vm or dom0 access the paged_out page,such as BSOD,crash.
What鈥檚 more,the dom0 is always in high I/O pressure.