diff options
| author | Joel Sherrill <joel.sherrill@OARcorp.com> | 2007-10-17 20:55:06 +0000 |
|---|---|---|
| committer | Joel Sherrill <joel.sherrill@OARcorp.com> | 2007-10-17 20:55:06 +0000 |
| commit | 14f44a3474b5177a73aede9d3ab142ab003f5796 (patch) | |
| tree | eeab866e741b2a851d712497384f45ea56717863 /irq_test/README | |
| parent | 2059da67a23d7a3be0316e154ff736c255c267a8 (diff) | |
2007-10-17 Joel Sherrill <joel.sherrill@oarcorp.com>
* Makefile, Makefile.shared, rtems_init.c, irq_test/interrupt_pkg.adb,
irq_test/interrupt_pkg.ads, irq_test/irqforce.c,
irq_test/irqtest.adb, rootfs/etc/hosts: Adding new tests as
improvements are made to the RTEMS port of the GNAT run-time.
* empty/Makefile, empty/README, empty/empty.adb,
hello_via_task/.cvsignore, hello_via_task/Makefile,
hello_via_task/hello.adb, irq_test/.cvsignore, irq_test/Makefile,
irq_test/README, irq_test_c/.cvsignore, irq_test_c/Makefile,
irq_test_c/README, irq_test_c/init.c, irq_test_c/irqforce.c: New files.
Diffstat (limited to 'irq_test/README')
| -rw-r--r-- | irq_test/README | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/irq_test/README b/irq_test/README new file mode 100644 index 0000000..9a0fac6 --- /dev/null +++ b/irq_test/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 Ada 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 +this program took 315 microseconds on a 14 Mhz SPARC/ERC32 to complete +the following sequence: + + + itest: Start Timer + + itest: Force IRQ + + hidden Ada ISR Handler: Release a simple binary semaphore + + Handler Task: Wake up from an Ada entry + + Handler Task: Stop Timer + +In comparison, the irq_test_c program implementing the same +sequence but using C interrupt tasks took only 158 microseconds +on the same target. |