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runtime: set runtime ncpu on openbsd

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Set the runtime ncpu based on the hw.ncpu sysctl.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5191043
This commit is contained in:
Joel Sing 2011-10-05 13:16:43 -04:00 committed by Russ Cox
parent 457dfd7546
commit b2f1eba324
4 changed files with 64 additions and 4 deletions
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18
src/pkg/runtime/openbsd/386/sys.s
View File

@ -269,4 +269,22 @@ TEXT runtime·osyield(SB),7,$-4
INT $0x80
RET
TEXT runtime·sysctl(SB),7,$28
LEAL arg0+0(FP), SI
LEAL 4(SP), DI
CLD
MOVSL // arg 1 - name
MOVSL // arg 2 - namelen
MOVSL // arg 3 - oldp
MOVSL // arg 4 - oldlenp
MOVSL // arg 5 - newp
MOVSL // arg 6 - newlen
MOVL $202, AX // sys___sysctl
INT $0x80
JCC 3(PC)
NEGL AX
RET
MOVL $0, AX
RET
GLOBL runtime·tlsoffset(SB),$4

16
src/pkg/runtime/openbsd/amd64/sys.s
View File

@ -235,3 +235,19 @@ TEXT runtime·settls(SB),7,$8
JCC 2(PC)
CALL runtime·notok(SB)
RET
TEXT runtime·sysctl(SB),7,$0
MOVQ 8(SP), DI // arg 1 - name
MOVL 16(SP), SI // arg 2 - namelen
MOVQ 24(SP), DX // arg 3 - oldp
MOVQ 32(SP), R10 // arg 4 - oldlenp
MOVQ 40(SP), R8 // arg 5 - newp
MOVQ 48(SP), R9 // arg 6 - newlen
MOVQ $202, AX // sys___sysctl
SYSCALL
JCC 3(PC)
NEGL AX
RET
MOVL $0, AX
RET

1
src/pkg/runtime/openbsd/os.h
View File

@ -8,5 +8,6 @@ void runtime·sigaltstack(Sigaltstack*, Sigaltstack*);
void runtime·sigaction(int32, struct sigaction*, struct sigaction*);
void runtime·setitimerval(int32, Itimerval*, Itimerval*);
void runtime·setitimer(int32, Itimerval*, Itimerval*);
int32 runtime·sysctl(uint32*, uint32, byte*, uintptr*, byte*, uintptr);
void runtime·raisesigpipe(void);

33
src/pkg/runtime/openbsd/thread.c
View File

@ -15,6 +15,30 @@ enum
ENOTSUP = 91,
};
// From OpenBSD's <sys/sysctl.h>
#define CTL_HW 6
#define HW_NCPU 3
static int32
getncpu(void)
{
uint32 mib[2];
uint32 out;
int32 ret;
uintptr nout;
// Fetch hw.ncpu via sysctl.
mib[0] = CTL_HW;
mib[1] = HW_NCPU;
nout = sizeof out;
out = 0;
ret = runtime·sysctl(mib, 2, (byte*)&out, &nout, nil, 0);
if(ret >= 0)
return out;
else
return 1;
}
// Basic spinlocks using CAS. We can improve on these later.
static void
lock(Lock *l)
@ -80,10 +104,10 @@ runtime·notewakeup(Note *n)
}
// From OpenBSD's sys/param.h
#define RFPROC (1<<4) /* change child (else changes curproc) */
#define RFMEM (1<<5) /* share `address space' */
#define RFNOWAIT (1<<6) /* parent need not wait() on child */
#define RFTHREAD (1<<13) /* create a thread, not a process */
#define RFPROC (1<<4) /* change child (else changes curproc) */
#define RFMEM (1<<5) /* share `address space' */
#define RFNOWAIT (1<<6) /* parent need not wait() on child */
#define RFTHREAD (1<<13) /* create a thread, not a process */
void
runtime·newosproc(M *m, G *g, void *stk, void (*fn)(void))
@ -112,6 +136,7 @@ runtime·newosproc(M *m, G *g, void *stk, void (*fn)(void))
void
runtime·osinit(void)
{
runtime·ncpu = getncpu();
}
void