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Reviewed by: msmith, bde long ago

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Fix for RTPRIO scheduler to eliminate invalid context switches.
This commit is contained in:
Peter Dufault 1998-03-04 10:25:03 +00:00
parent f688ebc13a
commit f3df61a1cd
3 changed files with 39 additions and 9 deletions
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16
sys/amd64/amd64/cpu_switch.S
View File

@ -33,10 +33,11 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE. * SUCH DAMAGE.
* *
* $Id: swtch.s,v 1.67 1998/02/04 22:32:11 eivind Exp $ * $Id: swtch.s,v 1.68 1998/02/06 12:13:10 eivind Exp $
*/ */
#include "npx.h" #include "npx.h"
#include "opt_posix4.h"
#include "opt_user_ldt.h" #include "opt_user_ldt.h"
#include "opt_vm86.h" #include "opt_vm86.h"
@ -112,7 +113,11 @@ set1:
movzwl P_RTPRIO_PRIO(%eax),%edx movzwl P_RTPRIO_PRIO(%eax),%edx
cmpw $RTP_PRIO_REALTIME,P_RTPRIO_TYPE(%eax) /* realtime priority? */ cmpw $RTP_PRIO_REALTIME,P_RTPRIO_TYPE(%eax) /* RR realtime priority? */
#ifdef POSIX4
je set_rt /* RT priority */
cmpw $RTP_PRIO_FIFO,P_RTPRIO_TYPE(%eax) /* FIFO realtime priority? */
#endif
jne set_id /* must be idle priority */ jne set_id /* must be idle priority */
set_rt: set_rt:
@ -164,9 +169,14 @@ ENTRY(remrq)
movzwl P_RTPRIO_PRIO(%eax),%edx movzwl P_RTPRIO_PRIO(%eax),%edx
cmpw $RTP_PRIO_REALTIME,P_RTPRIO_TYPE(%eax) /* normal priority process? */ cmpw $RTP_PRIO_REALTIME,P_RTPRIO_TYPE(%eax) /* realtime priority process? */
#ifdef POSIX4
je rem0rt
cmpw $RTP_PRIO_FIFO,P_RTPRIO_TYPE(%eax) /* FIFO realtime priority process? */
#endif
jne rem_id jne rem_id
rem0rt:
btrl %edx,_whichrtqs /* clear full bit, panic if clear already */ btrl %edx,_whichrtqs /* clear full bit, panic if clear already */
jb rem1rt jb rem1rt
pushl $rem3rt pushl $rem3rt

16
sys/amd64/amd64/swtch.s
View File

@ -33,10 +33,11 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE. * SUCH DAMAGE.
* *
* $Id: swtch.s,v 1.67 1998/02/04 22:32:11 eivind Exp $ * $Id: swtch.s,v 1.68 1998/02/06 12:13:10 eivind Exp $
*/ */
#include "npx.h" #include "npx.h"
#include "opt_posix4.h"
#include "opt_user_ldt.h" #include "opt_user_ldt.h"
#include "opt_vm86.h" #include "opt_vm86.h"
@ -112,7 +113,11 @@ set1:
movzwl P_RTPRIO_PRIO(%eax),%edx movzwl P_RTPRIO_PRIO(%eax),%edx
cmpw $RTP_PRIO_REALTIME,P_RTPRIO_TYPE(%eax) /* realtime priority? */ cmpw $RTP_PRIO_REALTIME,P_RTPRIO_TYPE(%eax) /* RR realtime priority? */
#ifdef POSIX4
je set_rt /* RT priority */
cmpw $RTP_PRIO_FIFO,P_RTPRIO_TYPE(%eax) /* FIFO realtime priority? */
#endif
jne set_id /* must be idle priority */ jne set_id /* must be idle priority */
set_rt: set_rt:
@ -164,9 +169,14 @@ ENTRY(remrq)
movzwl P_RTPRIO_PRIO(%eax),%edx movzwl P_RTPRIO_PRIO(%eax),%edx
cmpw $RTP_PRIO_REALTIME,P_RTPRIO_TYPE(%eax) /* normal priority process? */ cmpw $RTP_PRIO_REALTIME,P_RTPRIO_TYPE(%eax) /* realtime priority process? */
#ifdef POSIX4
je rem0rt
cmpw $RTP_PRIO_FIFO,P_RTPRIO_TYPE(%eax) /* FIFO realtime priority process? */
#endif
jne rem_id jne rem_id
rem0rt:
btrl %edx,_whichrtqs /* clear full bit, panic if clear already */ btrl %edx,_whichrtqs /* clear full bit, panic if clear already */
jb rem1rt jb rem1rt
pushl $rem3rt pushl $rem3rt

16
sys/i386/i386/swtch.s
View File

@ -33,10 +33,11 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE. * SUCH DAMAGE.
* *
* $Id: swtch.s,v 1.67 1998/02/04 22:32:11 eivind Exp $ * $Id: swtch.s,v 1.68 1998/02/06 12:13:10 eivind Exp $
*/ */
#include "npx.h" #include "npx.h"
#include "opt_posix4.h"
#include "opt_user_ldt.h" #include "opt_user_ldt.h"
#include "opt_vm86.h" #include "opt_vm86.h"
@ -112,7 +113,11 @@ set1:
movzwl P_RTPRIO_PRIO(%eax),%edx movzwl P_RTPRIO_PRIO(%eax),%edx
cmpw $RTP_PRIO_REALTIME,P_RTPRIO_TYPE(%eax) /* realtime priority? */ cmpw $RTP_PRIO_REALTIME,P_RTPRIO_TYPE(%eax) /* RR realtime priority? */
#ifdef POSIX4
je set_rt /* RT priority */
cmpw $RTP_PRIO_FIFO,P_RTPRIO_TYPE(%eax) /* FIFO realtime priority? */
#endif
jne set_id /* must be idle priority */ jne set_id /* must be idle priority */
set_rt: set_rt:
@ -164,9 +169,14 @@ ENTRY(remrq)
movzwl P_RTPRIO_PRIO(%eax),%edx movzwl P_RTPRIO_PRIO(%eax),%edx
cmpw $RTP_PRIO_REALTIME,P_RTPRIO_TYPE(%eax) /* normal priority process? */ cmpw $RTP_PRIO_REALTIME,P_RTPRIO_TYPE(%eax) /* realtime priority process? */
#ifdef POSIX4
je rem0rt
cmpw $RTP_PRIO_FIFO,P_RTPRIO_TYPE(%eax) /* FIFO realtime priority process? */
#endif
jne rem_id jne rem_id
rem0rt:
btrl %edx,_whichrtqs /* clear full bit, panic if clear already */ btrl %edx,_whichrtqs /* clear full bit, panic if clear already */
jb rem1rt jb rem1rt
pushl $rem3rt pushl $rem3rt