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go
golang
Commits
e7d549fb
Commit
e7d549fb
authored
Jul 16, 2008
by
Ken Thompson
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Plain Diff
new (more fifo) schedulint algorithm
newproc will reuse dead procs SVN=127565
parent
44b8934d
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Side-by-side
Showing
2 changed files
with
37 additions
and
15 deletions
+37
-15
proc.c
src/runtime/proc.c
+34
-13
runtime.h
src/runtime/runtime.h
+3
-2
No files found.
src/runtime/proc.c
View file @
e7d549fb
...
...
@@ -35,8 +35,24 @@ sys·newproc(int32 siz, byte* fn, byte* arg0)
sys
·
panicl
(
123
);
}
newg
=
mal
(
sizeof
(
G
));
stk
=
mal
(
4096
);
// try to rip off an old goroutine
for
(
newg
=
allg
;
newg
!=
nil
;
newg
=
newg
->
alllink
)
if
(
newg
->
status
==
Gdead
)
break
;
if
(
newg
==
nil
)
{
newg
=
mal
(
sizeof
(
G
));
stk
=
mal
(
4096
);
newg
->
stack0
=
stk
;
newg
->
status
=
Gwaiting
;
newg
->
alllink
=
allg
;
allg
=
newg
;
}
else
{
stk
=
newg
->
stack0
;
newg
->
status
=
Gwaiting
;
}
newg
->
stackguard
=
stk
+
160
;
sp
=
stk
+
4096
-
4
*
8
;
...
...
@@ -56,8 +72,6 @@ sys·newproc(int32 siz, byte* fn, byte* arg0)
newg
->
goid
=
goidgen
;
newg
->
status
=
Grunnable
;
newg
->
alllink
=
allg
;
allg
=
newg
;
//prints(" goid=");
//sys·printint(newg->goid);
...
...
@@ -67,18 +81,25 @@ sys·newproc(int32 siz, byte* fn, byte* arg0)
G
*
select
(
void
)
{
G
*
gp
,
*
bestg
;
G
*
gp
;
bestg
=
nil
;
gp
=
m
->
lastg
;
if
(
gp
==
nil
)
gp
=
allg
;
for
(
gp
=
gp
->
alllink
;
gp
!=
nil
;
gp
=
gp
->
alllink
)
{
if
(
gp
->
status
==
Grunnable
)
{
m
->
lastg
=
gp
;
return
gp
;
}
}
for
(
gp
=
allg
;
gp
!=
nil
;
gp
=
gp
->
alllink
)
{
if
(
gp
->
status
!=
Grunnable
)
continue
;
if
(
bestg
==
nil
||
gp
->
pri
<
bestg
->
pri
)
bestg
=
gp
;
if
(
gp
->
status
==
Grunnable
)
{
m
->
lastg
=
gp
;
return
gp
;
}
}
if
(
bestg
!=
nil
)
bestg
->
pri
++
;
return
bestg
;
return
nil
;
}
void
...
...
src/runtime/runtime.h
View file @
e7d549fb
...
...
@@ -105,11 +105,11 @@ struct G
{
byte
*
stackguard
;
// must not move
byte
*
stackbase
;
// must not move
byte
*
stack0
;
// first stack segment
Gobuf
sched
;
G
*
alllink
;
// on allq
G
*
qlink
;
// on wait q
int32
status
;
int32
pri
;
int32
goid
;
byte
elem
[
8
];
// transfer element for chan
};
...
...
@@ -117,8 +117,9 @@ struct M
{
G
*
g0
;
// g0 w interrupt stack - must not move
uint64
morearg
;
// arg to morestack - must not move
uint64
cret
;
// return value from C - must not move
uint64
cret
;
// return value from C - must not move
G
*
curg
;
// current running goroutine
G
*
lastg
;
// last running goroutine - to emulate fifo
Gobuf
sched
;
Gobuf
morestack
;
byte
*
moresp
;
...
...
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