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small optimization sys_sheduler

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git-svn-id: svn://kolibrios.org@1344 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
Alexey Teplov ( 2009-12-31 02:14:07 +00:00
parent d1bdc45e2f
commit 22dfbb516f
1 changed files with 46 additions and 61 deletions
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95
kernel/trunk/kernel.asm
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@ -3397,32 +3397,45 @@ endg
;3 - rdmsr. Counter in edx. (edx:eax) [esi:edi, edx] => [edx:esi, ecx]. Ret in ebx:eax. Block. ok. ;3 - rdmsr. Counter in edx. (edx:eax) [esi:edi, edx] => [edx:esi, ecx]. Ret in ebx:eax. Block. ok.
;4 - wrmsr. Counter in edx. (edx:eax) [esi:edi, edx] => [edx:esi, ecx]. Ret in ebx:eax. Block. ok. ;4 - wrmsr. Counter in edx. (edx:eax) [esi:edi, edx] => [edx:esi, ecx]. Ret in ebx:eax. Block. ok.
;--------------------------------------------------------------------------------------------- ;---------------------------------------------------------------------------------------------
iglobal
align 4
sheduler:
dd sys_sheduler.00
dd change_task
dd sys_sheduler.02
dd sys_sheduler.03
dd sys_sheduler.04
endg
sys_sheduler: sys_sheduler:
; old sys_sheduler ;noname & halyavin ;rewritten by <Lrz> 29.12.2009
; cmp eax,0 jmp dword [sheduler+eax*4]
; je shed_counter ;.shed_counter:
; cmp eax,2 .00:
; je perf_control mov eax,[context_counter]
; cmp eax,3 mov [esp+36],eax
; je rdmsr_instr ret
; cmp eax,4
; je wrmsr_instr
; cmp eax,1
; jne not_supported
; call change_task ;delay,0
;rewritten by <Lrz> 15.11.2009 .02:
test eax,eax ;.perf_control:
jz .shed_counter ;eax=0 test ebx,ebx
dec eax jz modify_pce ;if ecx=0
jz change_task ;eax=1 dec ebx
dec eax jz is_cache_enabled ;if ecx=1
jz .perf_control ;eax=2 dec ebx
dec eax jz cache_enable ;if ecx=2
jz .rdmsr_instr ;eax=3 ret
dec eax .03:
jnz @f ;.rdmsr_instr:
;wrmsr_instr ;eax=4 ;now counter in ecx
;(edx:eax) esi:edi => edx:esi
mov eax,esi
; mov ecx,edx
rdmsr
mov [esp+36],eax
mov [esp+24],edx ;ret in ebx?
ret
.04:
;.wrmsr_instr: ;.wrmsr_instr:
;now counter in ecx ;now counter in ecx
;(edx:eax) esi:edi => edx:esi ;(edx:eax) esi:edi => edx:esi
@ -3439,41 +3452,13 @@ sys_sheduler:
je @f je @f
mov eax,esi mov eax,esi
; mov ecx,edx
wrmsr wrmsr
; mov [esp + 36], eax ; mov [esp + 32], eax
; mov [esp + 24], edx ;ret in ebx? ; mov [esp + 20], edx ;ret in ebx?
@@: @@:
ret ret
.shed_counter:
mov eax,[context_counter]
mov [esp+36],eax
ret
.perf_control:
; inc eax ;now eax=3
add eax,3 ;restore eax=3
cmp ebx,eax
je cache_disable
dec eax
cmp ebx,eax
je cache_enable
dec eax
cmp ebx,eax
je is_cache_enabled
dec eax
cmp ebx,eax
je modify_pce
ret
.rdmsr_instr:
;now counter in ecx
;(edx:eax) esi:edi => edx:esi
mov eax,esi
rdmsr
mov [esp+36],eax
mov [esp+24],edx ;ret in ebx?
ret
cache_disable: cache_disable:
mov eax,cr0 mov eax,cr0
or eax,01100000000000000000000000000000b or eax,01100000000000000000000000000000b