On Fri, Apr 06, 2001 at 07:36:21PM +0200, Andrea Arcangeli wrote:
> 2/4Mbytes naturally aligned area). so probably I will take the vmalloc way
As expected vmalloc additional 2 tlbs aren't visible in the numbers (that
are mostly dominated by I/O anyways), I think it's the best solution to avoid
the order 2 multipage:
alpha:/home/andrea # time ./rawio-bench
Opening /dev/raw1
Allocating 50MB of memory
Reading from /dev/raw1
Writing data to /dev/raw1
real 0m5.241s
user 0m0.002s
sys 0m1.119s
alpha:/home/andrea # time ./rawio-bench
Opening /dev/raw1
Allocating 50MB of memory
Reading from /dev/raw1
Writing data to /dev/raw1
real 0m5.176s
user 0m0.003s
sys 0m1.128s
alpha:/home/andrea # time ./rawio-bench
Opening /dev/raw1
Allocating 50MB of memory
Reading from /dev/raw1
Writing data to /dev/raw1
real 0m5.196s
user 0m0.002s
sys 0m1.132s
alpha:/home/andrea # time ./rawio-bench
Opening /dev/raw1
Allocating 50MB of memory
Reading from /dev/raw1
Writing data to /dev/raw1
real 0m5.477s
user 0m0.004s
sys 0m1.146s
alpha:/home/andrea # time ./rawio-bench
Opening /dev/raw1
Allocating 50MB of memory
Reading from /dev/raw1
Writing data to /dev/raw1
real 0m5.217s
user 0m0.004s
sys 0m1.149s
alpha:/home/andrea #
Tomorrow maybe I will try to speed it up furhter using the desing described in
the first email.
The s/kmem_cache_alloc/vmalloc/ change is here for now and it is rock solid
for me (regression testing is still happy):
ftp://ftp.us.kernel.org/pub/linux/kernel/people/andrea/patches/v2.4/2.4.3/rawio-2
I think it's ok for inclusion.
Andrea
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
