[prefetch commit] r359 - wiki
codesite...@google.com
Date: Mon Aug 20 11:19:26 2007
New Revision: 359
Modified:
wiki/Soc2007Progress.wiki
Log:
Added conclusions for disk reordering.
Modified: wiki/Soc2007Progress.wiki
==============================================================================
--- wiki/Soc2007Progress.wiki (original)
+++ wiki/Soc2007Progress.wiki Mon Aug 20 11:19:26 2007
@@ -53,6 +53,10 @@
* Application prefetching gives some gain to disk-intensive applications like OpenOffice.
* Performance of app prefetching is better than built-in OpenOffice prefetching by 1.67s.
* Prefetching can cut down OpenOffice startup time (in comparison to no prefetching at all, i.e. disabled pagein) by 3.36s, from 14.38s to 11.01s. See InitialPrefetchingImplementationResults page for details.
+ * Files reordering on disk:
+ * Files reordering gives even shorter boot time, by 4.93s (47.75s vs 52.68).
+ * Impact on application startup or boot with OpenOffice was not measured, but it should help also.
+ * Further work on reordering files on disk seems worth the effort.
Known bugs:
* 3-aggregation does not work currently for gui and system traces (it works for boot), apparently some bug was introduced in script which processes trace.
@@ -62,6 +66,7 @@
* More tests (especially file contents tests) for disk layout tool.
* Improving disk layout tool to find free space areas to fit data.
* Improvements to reordering on boot (especially copying files).
+ * Measure application startup time and boot time with OpenOffice with disk reordering.
== News ==
* Sun, 12 Aug 2007