diff options
author | Jeremy Kerr <jk@ozlabs.org> | 2007-09-19 14:38:12 +1000 |
---|---|---|
committer | Paul Mackerras <paulus@samba.org> | 2007-09-19 15:12:16 +1000 |
commit | 98f06978ffebbec16abdea58489f217229580859 (patch) | |
tree | 4c0cad43f6bc59083e00a20c423864ac579cdf32 /crypto/md5.c | |
parent | 36ddbb1380f282b4280c57efdb646dd8647a789f (diff) |
[POWERPC] cell: Unify spufs syscall path
At present, a built-in spufs will not use the spufs_calls callbacks, but
directly call sys_spu_create. This saves us an indirect branch, but
means we have duplicated functions - one for CONFIG_SPU_FS=y and one for
=m.
This change unifies the spufs syscall path, and provides access to the
spufs_calls structure through a get/put pair. At present, the only user
of the spufs_calls structure is spu_syscalls.c, but this will facilitate
adding the coredump calls later.
Everyone likes numbers, right? Here's a before/after comparison with
CONFIG_SPU_FS=y, doing spu_create(); close(); 64k times.
Before:
[jk@cell ~]$ time ./spu_create
performing 65536 spu_create calls
real 0m24.075s
user 0m0.146s
sys 0m23.925s
After:
[jk@cell ~]$ time ./spu_create
performing 65536 spu_create calls
real 0m24.777s
user 0m0.141s
sys 0m24.631s
So, we're adding around 11us per syscall, at the benefit of having
only one syscall path.
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'crypto/md5.c')
0 files changed, 0 insertions, 0 deletions