diff options
Diffstat (limited to 'arch/powerpc/oprofile/cell/spu_profiler.c')
| -rw-r--r-- | arch/powerpc/oprofile/cell/spu_profiler.c | 34 |
1 files changed, 32 insertions, 2 deletions
diff --git a/arch/powerpc/oprofile/cell/spu_profiler.c b/arch/powerpc/oprofile/cell/spu_profiler.c index 8b1b9ccaff9..de170b7ae71 100644 --- a/arch/powerpc/oprofile/cell/spu_profiler.c +++ b/arch/powerpc/oprofile/cell/spu_profiler.c @@ -18,11 +18,21 @@ #include <asm/cell-pmu.h> #include "pr_util.h" -#define TRACE_ARRAY_SIZE 1024 #define SCALE_SHIFT 14 static u32 *samples; +/* spu_prof_running is a flag used to indicate if spu profiling is enabled + * or not. It is set by the routines start_spu_profiling_cycles() and + * start_spu_profiling_events(). The flag is cleared by the routines + * stop_spu_profiling_cycles() and stop_spu_profiling_events(). These + * routines are called via global_start() and global_stop() which are called in + * op_powerpc_start() and op_powerpc_stop(). These routines are called once + * per system as a result of the user starting/stopping oprofile. Hence, only + * one CPU per user at a time will be changing the value of spu_prof_running. + * In general, OProfile does not protect against multiple users trying to run + * OProfile at a time. + */ int spu_prof_running; static unsigned int profiling_interval; @@ -31,7 +41,7 @@ static unsigned int profiling_interval; #define SPU_PC_MASK 0xFFFF -static DEFINE_SPINLOCK(oprof_spu_smpl_arry_lck); +DEFINE_SPINLOCK(oprof_spu_smpl_arry_lck); unsigned long oprof_spu_smpl_arry_lck_flags; void set_spu_profiling_frequency(unsigned int freq_khz, unsigned int cycles_reset) @@ -212,6 +222,21 @@ int start_spu_profiling_cycles(unsigned int cycles_reset) return 0; } +/* + * Entry point for SPU event profiling. + * NOTE: SPU profiling is done system-wide, not per-CPU. + * + * cycles_reset is the count value specified by the user when + * setting up OProfile to count SPU_CYCLES. + */ +void start_spu_profiling_events(void) +{ + spu_prof_running = 1; + schedule_delayed_work(&spu_work, DEFAULT_TIMER_EXPIRE); + + return; +} + void stop_spu_profiling_cycles(void) { spu_prof_running = 0; @@ -219,3 +244,8 @@ void stop_spu_profiling_cycles(void) kfree(samples); pr_debug("SPU_PROF: stop_spu_profiling_cycles issued\n"); } + +void stop_spu_profiling_events(void) +{ + spu_prof_running = 0; +} |