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2007-12-21 Xi Yang <hiyangxi@gmail.com>

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* Makefile.am, configure.ac: Add support for proper stacking of
	priority inheritance on mutexes as well as enforce proper order of
	release.
	* sp36/.cvsignore, sp36/Makefile.am, sp36/sp36.doc,
	sp36/sp36.scn: New files.
This commit is contained in:
Joel Sherrill
2007-12-21 15:50:33 +00:00
parent fd84982c00
commit e8f4303a4c
7 changed files with 80 additions and 1 deletions
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8
testsuites/sptests/ChangeLog
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@@ -1,3 +1,11 @@
2007-12-21 Xi Yang <hiyangxi@gmail.com>
* Makefile.am, configure.ac: Add support for proper stacking of
priority inheritance on mutexes as well as enforce proper order of
release.
* sp36/.cvsignore, sp36/Makefile.am, sp36/sp36.doc,
sp36/sp36.scn: New files.
2007-12-20 Joel Sherrill <joel.sherrill@oarcorp.com>
* sp07/task1.c, sp34/changepri.c, sp35/priinv.c: Add rtems_task_self()

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testsuites/sptests/Makefile.am
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@@ -7,7 +7,7 @@ ACLOCAL_AMFLAGS = -I ../aclocal
## spfatal is not included for now
SUBDIRS = sp01 sp02 sp03 sp04 sp05 sp06 sp07 sp08 sp09 sp11 sp12 sp13 sp14 \
sp15 sp16 sp17 sp19 sp20 sp21 sp22 sp23 sp24 sp25 sp26 sp27 sp28 sp29 \
sp30 sp31 sp32 sp33 sp34 sp35 sp37 spsize
sp30 sp31 sp32 sp33 sp34 sp35 sp36 sp37 spsize
DIST_SUBDIRS = $(SUBDIRS) spfatal
include $(top_srcdir)/../automake/subdirs.am

1
testsuites/sptests/configure.ac
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@@ -60,6 +60,7 @@ sp32/Makefile
sp33/Makefile
sp34/Makefile
sp35/Makefile
sp36/Makefile
sp37/Makefile
spsize/Makefile
spfatal/Makefile

2
testsuites/sptests/sp36/.cvsignore Normal file
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@@ -0,0 +1,2 @@
Makefile
Makefile.in

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testsuites/sptests/sp36/Makefile.am Normal file
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@@ -0,0 +1,26 @@
##
## $Id$
##
MANAGERS = all
rtems_tests_PROGRAMS = sp36.exe
sp36_exe_SOURCES = strict_order_mut.c
dist_rtems_tests_DATA = sp36.scn
dist_rtems_tests_DATA += sp36.doc
include $(RTEMS_ROOT)/make/custom/@RTEMS_BSP@.cfg
include $(top_srcdir)/../automake/compile.am
include $(top_srcdir)/../automake/leaf.am
AM_CPPFLAGS += -I$(top_srcdir)/../support/include
LINK_OBJS = $(sp36_exe_OBJECTS) $(sp36_exe_LDADD)
LINK_LIBS = $(sp36_exe_LDLIBS)
sp36.exe$(EXEEXT): $(sp36_exe_OBJECTS) $(sp36_exe_DEPENDENCIES)
@rm -f sp36.exe$(EXEEXT)
$(make-exe)
include $(top_srcdir)/../automake/local.am

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testsuites/sptests/sp36/sp36.doc Normal file
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@@ -0,0 +1,42 @@
This is a simple test program to demonstrate strict order mutex.
1)What's strict order mutex ?
In rtems,when a task release a priority_inheritance or
priority ceiling semaphore,the kernel detect whether
this task holds priority_inheritance or priority
ceiling semaphore, if not, set the priority of task
back to real priority of task.
This method is right, but in theory, we would like
to reset the priority after releasing the mutex if
releasing it in LIFO order.Do it like this can decrease
the blocking time of a higher priority task .
2)How to enable "strict order mutex " ?
When configuring the rtems , add
ENABLE_STRICT_ORDER_MUTEX=1
to your configure parameter.
3)About this test program
T0,T1,S0,S1
T0,priority 4
T1,priority 1
S0,priority inheritance
S1,priority ceiling,priority ceiling 1
1,T0 obtain S0 then obtain S1, priority of T0 should be improved to 1
2,T0 try to release S0, but not in strict order, return error code
3,T0 release S1,the priority of T0 back to 4
4,T1 try to obtain S0
5,T1 should be blocked and the priority of T0 should be improved to 1
6,T0 release S0
7,T1 obtain S0
8,OVER.

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testsuites/sptests/sp36/sp36.scn Normal file
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