On Wed, Apr 06, 2005 at 01:18:52PM +0200, Arjan van de Ven wrote:
On Wed, 2005-04-06 at 07:06 -0400, Alan Cox wrote:
On Tue, Apr 05, 2005 at 11:53:33AM -0700, Jeffrey Buell wrote:
results are pretty ugly compared to a 2.6.1 install. FC4 ranges from 1.5X to 20X slower, while xen0 is about 2X to 6X slower. Is this expected? I'm looking for configuration differences now, but I'm wondering if anybody can
The fork ones are expected yes. The newest kernels have four level page tables and while this allows for huge 64bit systems it has a cost and there is optimisation work left to do.
I've not checked the kernel config options but if you look at the src.rpm you can see what debug is enabled
early test kernels usually have all debugging stuff enabled that will have a HUGE performance hit in such benchmarks. But that is why it is test1 and not the final release...
The expensive stuff (CONFIG_PAGE_ALLOC) is now off for test2. SLAB_DEBUG is still on, but as you know, thats nowhere near as expensive.
Dave