On Mon, 22 Oct 2007 19:31:04 -0400 Chris Mason <chris.mason@xxxxxxxxxx> wrote: > I did expect delayed allocation to help the write phases of > compilebench, especially the parts where it writes out .o files in > random order (basically writing medium sized files all over the > directory tree). But, every phase except reads showed huge > improvements. > > http://oss.oracle.com/~mason/compilebench/ext4/ext-create-compare.png > http://oss.oracle.com/~mason/compilebench/ext4/ext-compile-compare.png > http://oss.oracle.com/~mason/compilebench/ext4/ext-read-compare.png > http://oss.oracle.com/~mason/compilebench/ext4/ext-rm-compare.png This might make the IO during reads a little easier to see. The dirs will look like the kernel after a make -j. So each directory will have a bunch of small .c files that are close together and a bunch of .o files that are randomly created across the tree. http://oss.oracle.com/~mason/compilebench/ext4/ext4-read.mpg -chris - To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
