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| author | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2014-03-12 09:23:34 +0100 |
|---|---|---|
| committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2014-03-14 08:46:51 +0100 |
| commit | 0bf59cf0ae0aa28e3c09d01c3d3dd17b82283949 (patch) | |
| tree | e396ce525339911992b093625b4abad493266cbe /doc/cpu_supplement/general.t | |
| parent | smptests/smpload01: New test (diff) | |
| download | rtems-0bf59cf0ae0aa28e3c09d01c3d3dd17b82283949.tar.bz2 | |
Add documentation for profiling
Diffstat (limited to 'doc/cpu_supplement/general.t')
| -rw-r--r-- | doc/cpu_supplement/general.t | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/doc/cpu_supplement/general.t b/doc/cpu_supplement/general.t index deca4de3b3..9c952a7e97 100644 --- a/doc/cpu_supplement/general.t +++ b/doc/cpu_supplement/general.t @@ -362,6 +362,18 @@ provide the following two functions counter values. @end itemize +@section Interrupt Profiling + +The RTEMS profiling needs support by the CPU port for the interrupt entry and +exit times. In case profiling is enabled via the RTEMS build configuration +option @code{--enable-profiling} (in this case the pre-processor symbol +@code{RTEMS_PROFILING} is defined) the CPU port may provide data for the +interrupt entry and exit times of the outer-most interrupt. The CPU port can +feed interrupt entry and exit times with the +@code{_Profiling_Outer_most_interrupt_entry_and_exit()} function +(@code{#include <rtems/score/profiling.h>}). For an example please have a look +at @code{cpukit/score/cpu/arm/arm_exc_interrupt.S}. + @c @c @c |