diff options
| author | cinap_lenrek <cinap_lenrek@gmx.de> | 2013-09-26 22:24:31 +0200 |
|---|---|---|
| committer | cinap_lenrek <cinap_lenrek@gmx.de> | 2013-09-26 22:24:31 +0200 |
| commit | cdc2c30e99f2fb3d65dfbc8ef73efd433a3f1966 (patch) | |
| tree | 5c3d5a6a42311f09444ca34d09bfebc78e08f5a3 /sys/src/libc/arm | |
| parent | b4cdfc6c5517390d6be05b2c01e56bacc9e85ea8 (diff) | |
reverting semaphore lock changes from sources (r41ccd6d221da, rb28756e5ba29)
semaphore locks have much higher overhead than initially presented
in the "Semaphores in Plan9" paper. until the reason for it has been
found out i will revert the changes.
Diffstat (limited to 'sys/src/libc/arm')
| -rw-r--r-- | sys/src/libc/arm/cycles.c | 10 | ||||
| -rw-r--r-- | sys/src/libc/arm/mkfile | 1 |
2 files changed, 11 insertions, 0 deletions
diff --git a/sys/src/libc/arm/cycles.c b/sys/src/libc/arm/cycles.c new file mode 100644 index 000000000..d03e827ce --- /dev/null +++ b/sys/src/libc/arm/cycles.c @@ -0,0 +1,10 @@ +#include <u.h> +#include <libc.h> + +#pragma profile off + +void +cycles(uvlong*u) +{ + *u = 0LL; +} diff --git a/sys/src/libc/arm/mkfile b/sys/src/libc/arm/mkfile index 768bcdd46..14f81e1b8 100644 --- a/sys/src/libc/arm/mkfile +++ b/sys/src/libc/arm/mkfile @@ -20,6 +20,7 @@ SFILES=\ vlop.s\ CFILES=\ + cycles.c\ notejmp.c\ vlrt.c\ |