diff options
Diffstat (limited to 'sysdeps/mach/hurd/profil.c')
| -rw-r--r-- | sysdeps/mach/hurd/profil.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/sysdeps/mach/hurd/profil.c b/sysdeps/mach/hurd/profil.c index 431982e498..41c7c4b956 100644 --- a/sysdeps/mach/hurd/profil.c +++ b/sysdeps/mach/hurd/profil.c @@ -36,6 +36,7 @@ static size_t sample_scale; static sampled_pc_seqno_t seqno; static struct mutex lock = MUTEX_INITIALIZER; static mach_msg_timeout_t collector_timeout; /* ms between collections. */ +static int profile_tick; /* Enable statistical profiling, writing samples of the PC into at most SIZE bytes of SAMPLE_BUFFER; every processor clock tick while profiling @@ -62,8 +63,7 @@ update_waiter (u_short *sample_buffer, size_t size, size_t offset, u_int scale) if (! err) { - int tick; /* Microseconds per sample. */ - err = __task_enable_pc_sampling (__mach_task_self (), &tick, + err = __task_enable_pc_sampling (__mach_task_self (), &profile_tick, SAMPLED_PC_PERIODIC); if (!err && sample_scale == 0) /* Profiling was not turned on, so the collector thread was @@ -79,7 +79,7 @@ update_waiter (u_short *sample_buffer, size_t size, size_t offset, u_int scale) and the kernel buffer size we get the length of time it takes to fill the buffer; translate that to milliseconds for mach_msg, and chop it in half for general lag factor. */ - collector_timeout = MAX_PC_SAMPLES * tick / 1000 / 2; + collector_timeout = MAX_PC_SAMPLES * profile_tick / 1000 / 2; } } @@ -87,6 +87,12 @@ update_waiter (u_short *sample_buffer, size_t size, size_t offset, u_int scale) } int +__profile_frequency () +{ + return profile_tick; +} + +int profil (u_short *sample_buffer, size_t size, size_t offset, u_int scale) { error_t err; |