1
0
mirror of https://github.com/golang/go synced 2024-11-11 19:21:37 -07:00

runtime: faster finalizers

Linux/amd64, 2 x Intel Xeon E5620, 8 HT cores, 2.40GHz
benchmark                    old ns/op    new ns/op    delta
BenchmarkFinalizer              420.00       261.00  -37.86%
BenchmarkFinalizer-2            985.00       201.00  -79.59%
BenchmarkFinalizer-4           1077.00       244.00  -77.34%
BenchmarkFinalizer-8           1155.00       180.00  -84.42%
BenchmarkFinalizer-16          1182.00       184.00  -84.43%

BenchmarkFinalizerRun          2128.00      1378.00  -35.24%
BenchmarkFinalizerRun-2        1655.00      1418.00  -14.32%
BenchmarkFinalizerRun-4        1634.00      1522.00   -6.85%
BenchmarkFinalizerRun-8        2213.00      1581.00  -28.56%
BenchmarkFinalizerRun-16       2424.00      1599.00  -34.03%

Darwin/amd64, Intel L9600, 2 cores, 2.13GHz
benchmark                    old ns/op    new ns/op    delta
BenchmarkChanCreation          1451.00       926.00  -36.18%
BenchmarkChanCreation-2        3124.00      1412.00  -54.80%
BenchmarkChanCreation-4        6121.00      2628.00  -57.07%

BenchmarkFinalizer              684.00       420.00  -38.60%
BenchmarkFinalizer-2          11195.00       398.00  -96.44%
BenchmarkFinalizer-4          15862.00       654.00  -95.88%

BenchmarkFinalizerRun          2025.00      1397.00  -31.01%
BenchmarkFinalizerRun-2        3920.00      1447.00  -63.09%
BenchmarkFinalizerRun-4        9471.00      1545.00  -83.69%

R=golang-dev, cw, rsc
CC=golang-dev
https://golang.org/cl/4963057
This commit is contained in:
Dmitriy Vyukov 2011-10-06 18:42:51 +03:00
parent ad35cea762
commit c14b2689f0
32 changed files with 359 additions and 159 deletions

View File

@ -1,3 +1,4 @@
enum {
thechar = '8'
thechar = '8',
CacheLineSize = 64
};

View File

@ -1,3 +1,4 @@
enum {
thechar = '6'
thechar = '6',
CacheLineSize = 64
};

View File

@ -3,6 +3,7 @@
// license that can be found in the LICENSE file.
#include "runtime.h"
#include "arch.h"
#include "malloc.h"
static uintptr isclosureentry(uintptr);

View File

@ -1,3 +1,4 @@
enum {
thechar = '5'
thechar = '5',
CacheLineSize = 32
};

View File

@ -3,6 +3,7 @@
// license that can be found in the LICENSE file.
#include "runtime.h"
#include "arch.h"
#include "malloc.h"
void runtime·deferproc(void);

View File

@ -49,6 +49,7 @@
// in the situation when normally the goroutine "owns" handoff.
#include "runtime.h"
#include "arch.h"
#include "malloc.h"
enum

View File

@ -1,4 +1,9 @@
// Copyright 2010 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
#include "runtime.h"
#include "arch.h"
#include "defs.h"
#include "os.h"
#include "malloc.h"

View File

@ -131,8 +131,8 @@ func Semrelease(s *uint32)
// The argument x must be a pointer to an object allocated by
// calling new or by taking the address of a composite literal.
// The argument f must be a function that takes a single argument
// of x's type and returns no arguments. If either of these is not
// true, SetFinalizer aborts the program.
// of x's type and can have arbitrary ignored return values.
// If either of these is not true, SetFinalizer aborts the program.
//
// Finalizers are run in dependency order: if A points at B, both have
// finalizers, and they are otherwise unreachable, only the finalizer
@ -156,9 +156,6 @@ func Semrelease(s *uint32)
// A single goroutine runs all finalizers for a program, sequentially.
// If a finalizer must run for a long time, it should do so by starting
// a new goroutine.
//
// TODO(rsc): allow f to have (ignored) return values
//
func SetFinalizer(x, f interface{})
func getgoroot() string

View File

@ -1,4 +1,9 @@
// Copyright 2010 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
#include "runtime.h"
#include "arch.h"
#include "defs.h"
#include "os.h"
#include "malloc.h"

View File

@ -3,6 +3,7 @@
// license that can be found in the LICENSE file.
#include "runtime.h"
#include "arch.h"
#include "type.h"
#include "malloc.h"

View File

@ -1,4 +1,9 @@
// Copyright 2010 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
#include "runtime.h"
#include "arch.h"
#include "defs.h"
#include "os.h"
#include "malloc.h"

View File

@ -8,6 +8,7 @@
package runtime
#include "runtime.h"
#include "arch.h"
#include "stack.h"
#include "malloc.h"
#include "defs.h"
@ -85,7 +86,7 @@ runtime·mallocgc(uintptr size, uint32 flag, int32 dogc, int32 zeroed)
rate = 0x3fffffff;
m->mcache->next_sample = runtime·fastrand1() % (2*rate);
profile:
runtime·setblockspecial(v);
runtime·setblockspecial(v, true);
runtime·MProf_Malloc(v, size);
}
}
@ -457,8 +458,7 @@ func SetFinalizer(obj Eface, finalizer Eface) {
if(obj.type == nil) {
runtime·printf("runtime.SetFinalizer: first argument is nil interface\n");
throw:
runtime·throw("runtime.SetFinalizer");
goto throw;
}
if(obj.type->kind != KindPtr) {
runtime·printf("runtime.SetFinalizer: first argument is %S, not pointer\n", *obj.type->string);
@ -470,11 +470,8 @@ func SetFinalizer(obj Eface, finalizer Eface) {
}
nret = 0;
if(finalizer.type != nil) {
if(finalizer.type->kind != KindFunc) {
badfunc:
runtime·printf("runtime.SetFinalizer: second argument is %S, not func(%S)\n", *finalizer.type->string, *obj.type->string);
goto throw;
}
if(finalizer.type->kind != KindFunc)
goto badfunc;
ft = (FuncType*)finalizer.type;
if(ft->dotdotdot || ft->in.len != 1 || *(Type**)ft->in.array != obj.type)
goto badfunc;
@ -486,11 +483,16 @@ func SetFinalizer(obj Eface, finalizer Eface) {
nret += t->size;
}
nret = (nret + sizeof(void*)-1) & ~(sizeof(void*)-1);
if(runtime·getfinalizer(obj.data, 0)) {
runtime·printf("runtime.SetFinalizer: finalizer already set\n");
goto throw;
}
}
runtime·addfinalizer(obj.data, finalizer.data, nret);
if(!runtime·addfinalizer(obj.data, finalizer.data, nret)) {
runtime·printf("runtime.SetFinalizer: finalizer already set\n");
goto throw;
}
return;
badfunc:
runtime·printf("runtime.SetFinalizer: second argument is %S, not func(%S)\n", *finalizer.type->string, *obj.type->string);
throw:
runtime·throw("runtime.SetFinalizer");
}

View File

@ -362,11 +362,11 @@ struct MHeap
// central free lists for small size classes.
// the union makes sure that the MCentrals are
// spaced 64 bytes apart, so that each MCentral.Lock
// spaced CacheLineSize bytes apart, so that each MCentral.Lock
// gets its own cache line.
union {
MCentral;
byte pad[64];
byte pad[CacheLineSize];
} central[NumSizeClasses];
FixAlloc spanalloc; // allocator for Span*
@ -394,7 +394,7 @@ int32 runtime·checking;
void runtime·markspan(void *v, uintptr size, uintptr n, bool leftover);
void runtime·unmarkspan(void *v, uintptr size);
bool runtime·blockspecial(void*);
void runtime·setblockspecial(void*);
void runtime·setblockspecial(void*, bool);
void runtime·purgecachedstats(M*);
enum
@ -419,13 +419,5 @@ enum {
};
extern int32 runtime·malloc_profile;
typedef struct Finalizer Finalizer;
struct Finalizer
{
Finalizer *next; // for use by caller of getfinalizer
void (*fn)(void*);
void *arg;
int32 nret;
};
Finalizer* runtime·getfinalizer(void*, bool);
bool runtime·getfinalizer(void *p, bool del, void (**fn)(void*), int32 *nret);
void runtime·walkfintab(void (*fn)(void*));

View File

@ -7,6 +7,7 @@
// See malloc.h for an overview.
#include "runtime.h"
#include "arch.h"
#include "malloc.h"
void*

View File

@ -15,6 +15,7 @@
// so that it is faster to move those lists between MCaches and MCentrals.
#include "runtime.h"
#include "arch.h"
#include "malloc.h"
static bool MCentral_Grow(MCentral *c);

View File

@ -3,12 +3,17 @@
// license that can be found in the LICENSE file.
#include "runtime.h"
#include "arch.h"
#include "malloc.h"
// Lock to protect finalizer data structures.
// Cannot reuse mheap.Lock because the finalizer
// maintenance requires allocation.
static Lock finlock;
enum { debug = 0 };
typedef struct Fin Fin;
struct Fin
{
void (*fn)(void*);
int32 nret;
};
// Finalizer hash table. Direct hash, linear scan, at most 3/4 full.
// Table size is power of 3 so that hash can be key % max.
@ -20,15 +25,24 @@ static Lock finlock;
typedef struct Fintab Fintab;
struct Fintab
{
Lock;
void **key;
Finalizer **val;
Fin *val;
int32 nkey; // number of non-nil entries in key
int32 ndead; // number of dead (-1) entries in key
int32 max; // size of key, val allocations
};
#define TABSZ 17
#define TAB(p) (&fintab[((uintptr)(p)>>3)%TABSZ])
static struct {
Fintab;
uint8 pad[CacheLineSize - sizeof(Fintab)];
} fintab[TABSZ];
static void
addfintab(Fintab *t, void *k, Finalizer *v)
addfintab(Fintab *t, void *k, void (*fn)(void*), int32 nret)
{
int32 i, j;
@ -51,29 +65,31 @@ addfintab(Fintab *t, void *k, Finalizer *v)
ret:
t->key[i] = k;
t->val[i] = v;
t->val[i].fn = fn;
t->val[i].nret = nret;
}
static Finalizer*
lookfintab(Fintab *t, void *k, bool del)
static bool
lookfintab(Fintab *t, void *k, bool del, Fin *f)
{
int32 i, j;
Finalizer *v;
if(t->max == 0)
return nil;
return false;
i = (uintptr)k % (uintptr)t->max;
for(j=0; j<t->max; j++) {
if(t->key[i] == nil)
return nil;
return false;
if(t->key[i] == k) {
v = t->val[i];
if(f)
*f = t->val[i];
if(del) {
t->key[i] = (void*)-1;
t->val[i] = nil;
t->val[i].fn = nil;
t->val[i].nret = 0;
t->ndead++;
}
return v;
return true;
}
if(++i == t->max)
i = 0;
@ -81,88 +97,100 @@ lookfintab(Fintab *t, void *k, bool del)
// cannot happen - table is known to be non-full
runtime·throw("finalizer table inconsistent");
return nil;
return false;
}
static Fintab fintab;
// add finalizer; caller is responsible for making sure not already in table
void
runtime·addfinalizer(void *p, void (*f)(void*), int32 nret)
static void
resizefintab(Fintab *tab)
{
Fintab newtab;
void *k;
int32 i;
byte *base;
Finalizer *e;
runtime·memclr((byte*)&newtab, sizeof newtab);
newtab.max = tab->max;
if(newtab.max == 0)
newtab.max = 3*3*3;
else if(tab->ndead < tab->nkey/2) {
// grow table if not many dead values.
// otherwise just rehash into table of same size.
newtab.max *= 3;
}
e = nil;
if(f != nil) {
e = runtime·mal(sizeof *e);
e->fn = f;
e->nret = nret;
newtab.key = runtime·mallocgc(newtab.max*sizeof newtab.key[0], FlagNoPointers, 0, 1);
newtab.val = runtime·mallocgc(newtab.max*sizeof newtab.val[0], 0, 0, 1);
for(i=0; i<tab->max; i++) {
k = tab->key[i];
if(k != nil && k != (void*)-1)
addfintab(&newtab, k, tab->val[i].fn, tab->val[i].nret);
}
runtime·free(tab->key);
runtime·free(tab->val);
tab->key = newtab.key;
tab->val = newtab.val;
tab->nkey = newtab.nkey;
tab->ndead = newtab.ndead;
tab->max = newtab.max;
}
runtime·lock(&finlock);
if(!runtime·mlookup(p, &base, nil, nil) || p != base) {
runtime·unlock(&finlock);
runtime·throw("addfinalizer on invalid pointer");
bool
runtime·addfinalizer(void *p, void (*f)(void*), int32 nret)
{
Fintab *tab;
byte *base;
if(debug) {
if(!runtime·mlookup(p, &base, nil, nil) || p != base)
runtime·throw("addfinalizer on invalid pointer");
}
tab = TAB(p);
runtime·lock(tab);
if(f == nil) {
lookfintab(&fintab, p, 1);
runtime·unlock(&finlock);
return;
if(lookfintab(tab, p, true, nil))
runtime·setblockspecial(p, false);
runtime·unlock(tab);
return true;
}
if(lookfintab(&fintab, p, 0)) {
runtime·unlock(&finlock);
runtime·throw("double finalizer");
if(lookfintab(tab, p, false, nil)) {
runtime·unlock(tab);
return false;
}
runtime·setblockspecial(p);
if(fintab.nkey >= fintab.max/2+fintab.max/4) {
if(tab->nkey >= tab->max/2+tab->max/4) {
// keep table at most 3/4 full:
// allocate new table and rehash.
runtime·memclr((byte*)&newtab, sizeof newtab);
newtab.max = fintab.max;
if(newtab.max == 0)
newtab.max = 3*3*3;
else if(fintab.ndead < fintab.nkey/2) {
// grow table if not many dead values.
// otherwise just rehash into table of same size.
newtab.max *= 3;
}
newtab.key = runtime·mallocgc(newtab.max*sizeof newtab.key[0], FlagNoPointers, 0, 1);
newtab.val = runtime·mallocgc(newtab.max*sizeof newtab.val[0], 0, 0, 1);
for(i=0; i<fintab.max; i++) {
void *k;
k = fintab.key[i];
if(k != nil && k != (void*)-1)
addfintab(&newtab, k, fintab.val[i]);
}
runtime·free(fintab.key);
runtime·free(fintab.val);
fintab = newtab;
resizefintab(tab);
}
addfintab(&fintab, p, e);
runtime·unlock(&finlock);
addfintab(tab, p, f, nret);
runtime·setblockspecial(p, true);
runtime·unlock(tab);
return true;
}
// get finalizer; if del, delete finalizer.
// caller is responsible for updating RefHasFinalizer bit.
Finalizer*
runtime·getfinalizer(void *p, bool del)
// caller is responsible for updating RefHasFinalizer (special) bit.
bool
runtime·getfinalizer(void *p, bool del, void (**fn)(void*), int32 *nret)
{
Finalizer *f;
Fintab *tab;
bool res;
Fin f;
runtime·lock(&finlock);
f = lookfintab(&fintab, p, del);
runtime·unlock(&finlock);
return f;
tab = TAB(p);
runtime·lock(tab);
res = lookfintab(tab, p, del, &f);
runtime·unlock(tab);
if(res==false)
return false;
*fn = f.fn;
*nret = f.nret;
return true;
}
void
@ -170,12 +198,15 @@ runtime·walkfintab(void (*fn)(void*))
{
void **key;
void **ekey;
int32 i;
runtime·lock(&finlock);
key = fintab.key;
ekey = key + fintab.max;
for(; key < ekey; key++)
if(*key != nil && *key != ((void*)-1))
fn(*key);
runtime·unlock(&finlock);
for(i=0; i<TABSZ; i++) {
runtime·lock(&fintab[i]);
key = fintab[i].key;
ekey = key + fintab[i].max;
for(; key < ekey; key++)
if(*key != nil && *key != ((void*)-1))
fn(*key);
runtime·unlock(&fintab[i]);
}
}

View File

@ -0,0 +1,64 @@
// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package runtime_test
import (
"runtime"
"sync"
"sync/atomic"
"testing"
)
func fin(v *int) {
}
func BenchmarkFinalizer(b *testing.B) {
const CallsPerSched = 1000
procs := runtime.GOMAXPROCS(-1)
N := int32(b.N / CallsPerSched)
var wg sync.WaitGroup
wg.Add(procs)
for p := 0; p < procs; p++ {
go func() {
var data [CallsPerSched]*int
for i := 0; i < CallsPerSched; i++ {
data[i] = new(int)
}
for atomic.AddInt32(&N, -1) >= 0 {
runtime.Gosched()
for i := 0; i < CallsPerSched; i++ {
runtime.SetFinalizer(data[i], fin)
}
for i := 0; i < CallsPerSched; i++ {
runtime.SetFinalizer(data[i], nil)
}
}
wg.Done()
}()
}
wg.Wait()
}
func BenchmarkFinalizerRun(b *testing.B) {
const CallsPerSched = 1000
procs := runtime.GOMAXPROCS(-1)
N := int32(b.N / CallsPerSched)
var wg sync.WaitGroup
wg.Add(procs)
for p := 0; p < procs; p++ {
go func() {
for atomic.AddInt32(&N, -1) >= 0 {
runtime.Gosched()
for i := 0; i < CallsPerSched; i++ {
v := new(int)
runtime.SetFinalizer(v, fin)
}
runtime.GC()
}
wg.Done()
}()
}
wg.Wait()
}

View File

@ -7,6 +7,7 @@
// See malloc.h for overview.
#include "runtime.h"
#include "arch.h"
#include "malloc.h"
// Initialize f to allocate objects of the given size,

View File

@ -5,6 +5,7 @@
// Garbage collector.
#include "runtime.h"
#include "arch.h"
#include "malloc.h"
#include "stack.h"
@ -67,12 +68,33 @@ struct Workbuf
byte *obj[512-2];
};
typedef struct Finalizer Finalizer;
struct Finalizer
{
void (*fn)(void*);
void *arg;
int32 nret;
};
typedef struct FinBlock FinBlock;
struct FinBlock
{
FinBlock *alllink;
FinBlock *next;
int32 cnt;
int32 cap;
Finalizer fin[1];
};
extern byte data[];
extern byte etext[];
extern byte end[];
static G *fing;
static Finalizer *finq;
static FinBlock *finq; // list of finalizers that are to be executed
static FinBlock *finc; // cache of free blocks
static FinBlock *allfin; // list of all blocks
static Lock finlock;
static int32 fingwait;
static void runfinq(void);
@ -651,6 +673,7 @@ static void
mark(void (*scan)(byte*, int64))
{
G *gp;
FinBlock *fb;
// mark data+bss.
// skip runtime·mheap itself, which has no interesting pointers
@ -685,11 +708,50 @@ mark(void (*scan)(byte*, int64))
else
runtime·walkfintab(markfin);
for(fb=allfin; fb; fb=fb->alllink)
scanblock((byte*)fb->fin, fb->cnt*sizeof(fb->fin[0]));
// in multiproc mode, join in the queued work.
scan(nil, 0);
}
// Sweep frees or calls finalizers for blocks not marked in the mark phase.
static bool
handlespecial(byte *p, uintptr size)
{
void (*fn)(void*);
int32 nret;
FinBlock *block;
Finalizer *f;
if(!runtime·getfinalizer(p, true, &fn, &nret)) {
runtime·setblockspecial(p, false);
runtime·MProf_Free(p, size);
return false;
}
runtime·lock(&finlock);
if(finq == nil || finq->cnt == finq->cap) {
if(finc == nil) {
finc = runtime·SysAlloc(PageSize);
finc->cap = (PageSize - sizeof(FinBlock)) / sizeof(Finalizer) + 1;
finc->alllink = allfin;
allfin = finc;
}
block = finc;
finc = block->next;
block->next = finq;
finq = block;
}
f = &finq->fin[finq->cnt];
finq->cnt++;
f->fn = fn;
f->nret = nret;
f->arg = p;
runtime·unlock(&finlock);
return true;
}
// Sweep frees or collects finalizers for blocks not marked in the mark phase.
// It clears the mark bits in preparation for the next GC round.
static void
sweep(void)
@ -699,7 +761,6 @@ sweep(void)
uintptr size;
byte *p;
MCache *c;
Finalizer *f;
byte *arena_start;
arena_start = runtime·mheap.arena_start;
@ -750,21 +811,12 @@ sweep(void)
continue;
}
// Special means it has a finalizer or is being profiled.
// In DebugMark mode, the bit has been coopted so
// we have to assume all blocks are special.
if(DebugMark || (bits & bitSpecial) != 0) {
// Special means it has a finalizer or is being profiled.
// In DebugMark mode, the bit has been coopted so
// we have to assume all blocks are special.
f = runtime·getfinalizer(p, 1);
if(f != nil) {
f->arg = p;
for(;;) {
f->next = finq;
if(runtime·casp(&finq, f->next, f))
break;
}
if(handlespecial(p, size))
continue;
}
runtime·MProf_Free(p, size);
}
// Mark freed; restore block boundary bit.
@ -864,7 +916,6 @@ runtime·gc(int32 force)
int64 t0, t1, t2, t3;
uint64 heap0, heap1, obj0, obj1;
byte *p;
Finalizer *fp;
bool extra;
// The gc is turned off (via enablegc) until
@ -945,8 +996,7 @@ runtime·gc(int32 force)
m->gcing = 0;
m->locks++; // disable gc during the mallocs in newproc
fp = finq;
if(fp != nil) {
if(finq != nil) {
// kick off or wake up goroutine to run queued finalizers
if(fing == nil)
fing = runtime·newproc1((byte*)runfinq, nil, 0, 0, runtime·gc);
@ -987,8 +1037,8 @@ runtime·gc(int32 force)
// the maximum number of procs.
runtime·starttheworld(extra);
// give the queued finalizers, if any, a chance to run
if(fp != nil)
// give the queued finalizers, if any, a chance to run
if(finq != nil)
runtime·gosched();
if(gctrace > 1 && !force)
@ -1014,9 +1064,13 @@ runtime·UpdateMemStats(void)
static void
runfinq(void)
{
Finalizer *f, *next;
Finalizer *f;
FinBlock *fb, *next;
byte *frame;
uint32 framesz, framecap, i;
frame = nil;
framecap = 0;
for(;;) {
// There's no need for a lock in this section
// because it only conflicts with the garbage
@ -1024,25 +1078,34 @@ runfinq(void)
// runs when everyone else is stopped, and
// runfinq only stops at the gosched() or
// during the calls in the for loop.
f = finq;
fb = finq;
finq = nil;
if(f == nil) {
if(fb == nil) {
fingwait = 1;
g->status = Gwaiting;
g->waitreason = "finalizer wait";
runtime·gosched();
continue;
}
for(; f; f=next) {
next = f->next;
frame = runtime·mal(sizeof(uintptr) + f->nret);
*(void**)frame = f->arg;
reflect·call((byte*)f->fn, frame, sizeof(uintptr) + f->nret);
runtime·free(frame);
f->fn = nil;
f->arg = nil;
f->next = nil;
runtime·free(f);
for(; fb; fb=next) {
next = fb->next;
for(i=0; i<fb->cnt; i++) {
f = &fb->fin[i];
framesz = sizeof(uintptr) + f->nret;
if(framecap < framesz) {
runtime·free(frame);
frame = runtime·mal(framesz);
framecap = framesz;
}
*(void**)frame = f->arg;
runtime·setblockspecial(f->arg, false);
reflect·call((byte*)f->fn, frame, sizeof(uintptr) + f->nret);
f->fn = nil;
f->arg = nil;
}
fb->cnt = 0;
fb->next = finc;
finc = fb;
}
runtime·gc(1); // trigger another gc to clean up the finalized objects, if possible
}
@ -1203,7 +1266,7 @@ runtime·blockspecial(void *v)
}
void
runtime·setblockspecial(void *v)
runtime·setblockspecial(void *v, bool s)
{
uintptr *b, off, shift, bits, obits;
@ -1216,7 +1279,10 @@ runtime·setblockspecial(void *v)
for(;;) {
obits = *b;
bits = obits | (bitSpecial<<shift);
if(s)
bits = obits | (bitSpecial<<shift);
else
bits = obits & ~(bitSpecial<<shift);
if(runtime·singleproc) {
*b = bits;
break;

View File

@ -13,6 +13,7 @@
// and heapmap(i) == span for all s->start <= i < s->start+s->npages.
#include "runtime.h"
#include "arch.h"
#include "malloc.h"
static MSpan *MHeap_AllocLocked(MHeap*, uintptr, int32);

View File

@ -7,6 +7,7 @@
package runtime
#include "runtime.h"
#include "arch.h"
#include "malloc.h"
#include "defs.h"
#include "type.h"

View File

@ -26,6 +26,7 @@
// TODO(rsc): Compute max waste for any given size.
#include "runtime.h"
#include "arch.h"
#include "malloc.h"
int32 runtime·class_to_size[NumSizeClasses];

View File

@ -1,4 +1,9 @@
// Copyright 2010 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
#include "runtime.h"
#include "arch.h"
#include "defs.h"
#include "os.h"
#include "malloc.h"

View File

@ -1,3 +1,7 @@
// Copyright 2010 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
#define SIG_DFL ((void*)0)
#define SIG_IGN ((void*)1)

View File

@ -3,6 +3,7 @@
// license that can be found in the LICENSE file.
#include "runtime.h"
#include "arch.h"
#include "malloc.h"
#include "os.h"

View File

@ -490,8 +490,7 @@ uintptr runtime·nohash(uint32, void*);
uint32 runtime·noequal(uint32, void*, void*);
void* runtime·malloc(uintptr size);
void runtime·free(void *v);
void runtime·addfinalizer(void*, void(*fn)(void*), int32);
void runtime·walkfintab(void (*fn)(void*));
bool runtime·addfinalizer(void*, void(*fn)(void*), int32);
void runtime·runpanic(Panic*);
void* runtime·getcallersp(void*);
int32 runtime·mcount(void);

View File

@ -19,6 +19,7 @@
package runtime
#include "runtime.h"
#include "arch.h"
typedef struct Sema Sema;
struct Sema
@ -45,11 +46,7 @@ struct SemaRoot
static union
{
SemaRoot;
// Modern processors tend to have 64-byte cache lines,
// potentially with 128-byte effective cache line size for reading.
// While there are hypothetical architectures
// with 16-4096 byte cache lines, 128 looks like a good compromise.
uint8 pad[128];
uint8 pad[CacheLineSize];
} semtable[SEMTABLESZ];
static SemaRoot*

View File

@ -3,6 +3,7 @@
// license that can be found in the LICENSE file.
#include "runtime.h"
#include "arch.h"
#include "type.h"
#include "malloc.h"

View File

@ -4,6 +4,7 @@
package runtime
#include "runtime.h"
#include "arch.h"
#include "malloc.h"
String runtime·emptystring;

View File

@ -3,6 +3,7 @@
// license that can be found in the LICENSE file.
#include "runtime.h"
#include "arch.h"
#include "os.h"
#include "defs.h"
#include "malloc.h"

View File

@ -47,18 +47,28 @@ func finalB(b *B) {
nfinal++
}
func nofinalB(b *B) {
panic("nofinalB run")
}
func main() {
runtime.GOMAXPROCS(4)
for i = 0; i < N; i++ {
b := &B{i}
a := &A{b, i}
c := new(B)
runtime.SetFinalizer(c, nofinalB)
runtime.SetFinalizer(b, finalB)
runtime.SetFinalizer(a, finalA)
runtime.SetFinalizer(c, nil)
}
for i := 0; i < N; i++ {
runtime.GC()
runtime.Gosched()
time.Sleep(1e6)
if nfinal >= N*8/10 {
break
}
}
if nfinal < N*8/10 {
println("not enough finalizing:", nfinal, "/", N)

View File

@ -33,6 +33,7 @@ func bigger() {
func main() {
runtime.GC() // clean up garbage from init
runtime.UpdateMemStats() // first call can do some allocations
runtime.MemProfileRate = 0 // disable profiler
runtime.MemStats.Alloc = 0 // ignore stacks
flag.Parse()