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Diffstat (limited to 'irq_test_c/README')
| -rw-r--r-- | irq_test_c/README | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/irq_test_c/README b/irq_test_c/README new file mode 100644 index 0000000..28a0309 --- /dev/null +++ b/irq_test_c/README @@ -0,0 +1,26 @@ +# +# $Id$ +# + +WARNING!!! Code is ERC32 specific. + +The directories irq_test and irq_test_c are related and provided +for performance comparisons. + +This directory contains a simple benchmark in C of a forced interrupt +and provides a baseline comparison point for the performance +of the GNAT implementation of Ada interrupt tasks on RTEMS. + +On 17 October 2007, this program run on TSIM reported that +it took 158 microseconds on a 14 Mhz SPARC/ERC32 to complete +the following sequence: + + + Init: Start Timer + + Init: Force IRQ + + ISR: Release a simple binary semaphore + + ISR Task: Wake up from simple binary semaphore + + ISR Task: Stop Timer + +In comparison, an Ada program implementing the same +sequence but using Ada interrupt tasks took 315 microseconds +on the same target. |