Quoting Samuel Thibault (2014-01-06 02:43:20)
Justus Winter, le Mon 06 Jan 2014 00:34:55 +0100, a écrit :
* kern/slab.h (struct kmem_cache): Reorder the fields so that all hot
fields are within the first cache line.
Did you try to benchmark this a bit?
I'm unsure about all movements:
On Mon, Jan 06, 2014 at 11:47:10AM +0100, Justus Winter wrote:
No, but I profiled this. This is the output of pahole (on the left)
and the results of my profiling on the right. The rightmost number is
the access count. This is the situation before my patch:
This looks fine to me, although
Richard Braun, le Mon 06 Jan 2014 11:56:57 +0100, a écrit :
On Mon, Jan 06, 2014 at 11:47:10AM +0100, Justus Winter wrote:
No, but I profiled this. This is the output of pahole (on the left)
and the results of my profiling on the right. The rightmost number is
the access count. This is
* kern/slab.h (struct kmem_cache): Reorder the fields so that all hot
fields are within the first cache line.
---
kern/slab.h | 18 --
1 file changed, 12 insertions(+), 6 deletions(-)
diff --git a/kern/slab.h b/kern/slab.h
index fd65893..457dee4 100644
--- a/kern/slab.h
+++
Justus Winter, le Mon 06 Jan 2014 00:34:55 +0100, a écrit :
* kern/slab.h (struct kmem_cache): Reorder the fields so that all hot
fields are within the first cache line.
Did you try to benchmark this a bit?
I'm unsure about all movements: nr_free_slabs, for instance, should
probably really go
