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Eliminate a pointless TLB flush from the SMP idle loop.

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Submitted by:	Luoqi Chen <luoqi@watermarkgroup.com>
Reviewed by:	"John S. Dyson" <toor@dyson.iquest.net>
This commit is contained in:
alc 1999-03-20 18:44:13 +00:00
parent 70ba7a32ce
commit 1c18b849ca
3 changed files with 3 additions and 21 deletions
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8
sys/amd64/amd64/cpu_switch.S
View File

@ -33,7 +33,7 @@
* 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 1.75 1998/07/28 17:35:09 bde Exp $ * $Id: swtch.s,v 1.76 1999/03/18 04:22:23 jlemon Exp $
*/ */
#include "npx.h" #include "npx.h"
@ -317,12 +317,6 @@ _idle:
.globl idle_loop .globl idle_loop
idle_loop: idle_loop:
#if defined(SWTCH_OPTIM_STATS)
incl _tlb_flush_count
#endif
movl %cr3,%eax /* ouch! */
movl %eax,%cr3
cmpl $0,_smp_active cmpl $0,_smp_active
jne 1f jne 1f
cmpl $0,_cpuid cmpl $0,_cpuid

8
sys/amd64/amd64/swtch.s
View File

@ -33,7 +33,7 @@
* 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 1.75 1998/07/28 17:35:09 bde Exp $ * $Id: swtch.s,v 1.76 1999/03/18 04:22:23 jlemon Exp $
*/ */
#include "npx.h" #include "npx.h"
@ -317,12 +317,6 @@ _idle:
.globl idle_loop .globl idle_loop
idle_loop: idle_loop:
#if defined(SWTCH_OPTIM_STATS)
incl _tlb_flush_count
#endif
movl %cr3,%eax /* ouch! */
movl %eax,%cr3
cmpl $0,_smp_active cmpl $0,_smp_active
jne 1f jne 1f
cmpl $0,_cpuid cmpl $0,_cpuid

8
sys/i386/i386/swtch.s
View File

@ -33,7 +33,7 @@
* 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 1.75 1998/07/28 17:35:09 bde Exp $ * $Id: swtch.s,v 1.76 1999/03/18 04:22:23 jlemon Exp $
*/ */
#include "npx.h" #include "npx.h"
@ -317,12 +317,6 @@ _idle:
.globl idle_loop .globl idle_loop
idle_loop: idle_loop:
#if defined(SWTCH_OPTIM_STATS)
incl _tlb_flush_count
#endif
movl %cr3,%eax /* ouch! */
movl %eax,%cr3
cmpl $0,_smp_active cmpl $0,_smp_active
jne 1f jne 1f
cmpl $0,_cpuid cmpl $0,_cpuid