L4Re Operating System Framework
Interface and Usage Documentation
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Timestamp counter related functions. More...
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Functions | |
l4_cpu_time_t | l4_rdtsc (void) |
Read current value of CPU-internal timestamp counter. | |
l4_uint32_t | l4_rdtsc_32 (void) |
Read the lest significant 32 bit of the TSC. | |
l4_uint64_t | l4_rdpmc (int ecx) |
Return current value of CPU-internal performance measurement counter. | |
l4_uint32_t | l4_rdpmc_32 (int ecx) |
Return the least significant 32 bit of a performance counter. | |
l4_uint64_t | l4_tsc_to_ns (l4_cpu_time_t tsc) |
Convert timestamp to ns value. | |
l4_uint64_t | l4_tsc_to_us (l4_cpu_time_t tsc) |
Convert timestamp into micro seconds value. | |
void | l4_tsc_to_s_and_ns (l4_cpu_time_t tsc, l4_uint32_t *s, l4_uint32_t *ns) |
Convert timestamp to s.ns value. | |
l4_cpu_time_t | l4_ns_to_tsc (l4_uint64_t ns) |
Convert nano seconds into CPU ticks. | |
void | l4_busy_wait_ns (l4_uint64_t ns) |
Wait busy for a small amount of time. | |
void | l4_busy_wait_us (l4_uint64_t us) |
Wait busy for a small amount of time. | |
l4_uint32_t | l4_calibrate_tsc (l4_kernel_info_t const *kip) |
Determine scalers for timestamp calculations. | |
l4_uint32_t | l4_tsc_init (l4_kernel_info_t const *kip) |
Initialize scaler for TSC calibrations from the kernel. | |
l4_uint32_t | l4_get_hz (void) |
Get CPU frequency in Hz. | |
Timestamp counter related functions.
Definition in file rdtsc.h.