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| author | Jordi Caubet <jordi_caubet@es.ibm.com> | 2006-04-12 19:44:27 +0400 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2006-04-13 20:38:46 +0400 |
| commit | 183b73ae7c9e4e19fa95d88e1778481899a65210 (patch) | |
| tree | fc428c7de0612de1ae941a32c172a8c07b8d35fd /arch/powerpc/platforms/cell/spufs/switch.c | |
| parent | f48b8296b3152bb45c07c544ce072eaa59dfbc7c (diff) | |
| download | linux-183b73ae7c9e4e19fa95d88e1778481899a65210.tar.xz | |
[PATCH] spufs: fix context-switch decrementer code
We found that when the 'decrementer' is saved, the PPE saves the current
time 'csa->suspend_time'. When restoring the 'decrementer', (Step 34)
decrementer seems to be adjusted with the number of cycles th= at a spu
thread has not been running.
In that code it is missing a substract ('-') because 'delta_time' is
assigned a not substracted(see bellow).
Acked-by: Mark Nutter <mnutter@us.ibm.com>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/platforms/cell/spufs/switch.c')
| -rw-r--r-- | arch/powerpc/platforms/cell/spufs/switch.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/platforms/cell/spufs/switch.c b/arch/powerpc/platforms/cell/spufs/switch.c index 97898d5d34e5..1726bfe38ee0 100644 --- a/arch/powerpc/platforms/cell/spufs/switch.c +++ b/arch/powerpc/platforms/cell/spufs/switch.c @@ -1297,7 +1297,7 @@ static inline void setup_decr(struct spu_state *csa, struct spu *spu) cycles_t resume_time = get_cycles(); cycles_t delta_time = resume_time - csa->suspend_time; - csa->lscsa->decr.slot[0] = delta_time; + csa->lscsa->decr.slot[0] -= delta_time; } } |