mirror of
https://github.com/golang/go
synced 2024-11-24 03:10:02 -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:
parent
ad35cea762
commit
c14b2689f0
@ -1,3 +1,4 @@
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enum {
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thechar = '8'
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thechar = '8',
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CacheLineSize = 64
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};
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@ -1,3 +1,4 @@
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enum {
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thechar = '6'
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thechar = '6',
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CacheLineSize = 64
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};
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@ -3,6 +3,7 @@
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// license that can be found in the LICENSE file.
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#include "runtime.h"
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#include "arch.h"
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#include "malloc.h"
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static uintptr isclosureentry(uintptr);
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@ -1,3 +1,4 @@
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enum {
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thechar = '5'
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thechar = '5',
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CacheLineSize = 32
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};
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@ -3,6 +3,7 @@
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// license that can be found in the LICENSE file.
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#include "runtime.h"
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#include "arch.h"
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#include "malloc.h"
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void runtime·deferproc(void);
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@ -49,6 +49,7 @@
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// in the situation when normally the goroutine "owns" handoff.
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#include "runtime.h"
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#include "arch.h"
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#include "malloc.h"
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enum
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@ -1,4 +1,9 @@
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// Copyright 2010 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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#include "runtime.h"
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#include "arch.h"
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#include "defs.h"
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#include "os.h"
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#include "malloc.h"
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@ -131,8 +131,8 @@ func Semrelease(s *uint32)
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// The argument x must be a pointer to an object allocated by
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// calling new or by taking the address of a composite literal.
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// The argument f must be a function that takes a single argument
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// of x's type and returns no arguments. If either of these is not
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// true, SetFinalizer aborts the program.
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// of x's type and can have arbitrary ignored return values.
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// If either of these is not true, SetFinalizer aborts the program.
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//
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// Finalizers are run in dependency order: if A points at B, both have
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// finalizers, and they are otherwise unreachable, only the finalizer
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@ -156,9 +156,6 @@ func Semrelease(s *uint32)
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// A single goroutine runs all finalizers for a program, sequentially.
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// If a finalizer must run for a long time, it should do so by starting
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// a new goroutine.
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//
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// TODO(rsc): allow f to have (ignored) return values
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//
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func SetFinalizer(x, f interface{})
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func getgoroot() string
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@ -1,4 +1,9 @@
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// Copyright 2010 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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#include "runtime.h"
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#include "arch.h"
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#include "defs.h"
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#include "os.h"
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#include "malloc.h"
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@ -3,6 +3,7 @@
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// license that can be found in the LICENSE file.
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#include "runtime.h"
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#include "arch.h"
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#include "type.h"
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#include "malloc.h"
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@ -1,4 +1,9 @@
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// Copyright 2010 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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#include "runtime.h"
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#include "arch.h"
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#include "defs.h"
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#include "os.h"
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#include "malloc.h"
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@ -8,6 +8,7 @@
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package runtime
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#include "runtime.h"
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#include "arch.h"
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#include "stack.h"
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#include "malloc.h"
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#include "defs.h"
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@ -85,7 +86,7 @@ runtime·mallocgc(uintptr size, uint32 flag, int32 dogc, int32 zeroed)
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rate = 0x3fffffff;
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m->mcache->next_sample = runtime·fastrand1() % (2*rate);
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profile:
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runtime·setblockspecial(v);
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runtime·setblockspecial(v, true);
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runtime·MProf_Malloc(v, size);
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}
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}
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@ -457,8 +458,7 @@ func SetFinalizer(obj Eface, finalizer Eface) {
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if(obj.type == nil) {
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runtime·printf("runtime.SetFinalizer: first argument is nil interface\n");
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throw:
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runtime·throw("runtime.SetFinalizer");
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goto throw;
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}
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if(obj.type->kind != KindPtr) {
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runtime·printf("runtime.SetFinalizer: first argument is %S, not pointer\n", *obj.type->string);
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@ -470,11 +470,8 @@ func SetFinalizer(obj Eface, finalizer Eface) {
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}
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nret = 0;
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if(finalizer.type != nil) {
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if(finalizer.type->kind != KindFunc) {
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badfunc:
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runtime·printf("runtime.SetFinalizer: second argument is %S, not func(%S)\n", *finalizer.type->string, *obj.type->string);
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goto throw;
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}
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if(finalizer.type->kind != KindFunc)
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goto badfunc;
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ft = (FuncType*)finalizer.type;
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if(ft->dotdotdot || ft->in.len != 1 || *(Type**)ft->in.array != obj.type)
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goto badfunc;
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@ -486,11 +483,16 @@ func SetFinalizer(obj Eface, finalizer Eface) {
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nret += t->size;
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}
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nret = (nret + sizeof(void*)-1) & ~(sizeof(void*)-1);
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if(runtime·getfinalizer(obj.data, 0)) {
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runtime·printf("runtime.SetFinalizer: finalizer already set\n");
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goto throw;
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}
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}
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runtime·addfinalizer(obj.data, finalizer.data, nret);
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if(!runtime·addfinalizer(obj.data, finalizer.data, nret)) {
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runtime·printf("runtime.SetFinalizer: finalizer already set\n");
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goto throw;
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}
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return;
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badfunc:
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runtime·printf("runtime.SetFinalizer: second argument is %S, not func(%S)\n", *finalizer.type->string, *obj.type->string);
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throw:
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runtime·throw("runtime.SetFinalizer");
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}
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@ -362,11 +362,11 @@ struct MHeap
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// central free lists for small size classes.
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// the union makes sure that the MCentrals are
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// spaced 64 bytes apart, so that each MCentral.Lock
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// spaced CacheLineSize bytes apart, so that each MCentral.Lock
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// gets its own cache line.
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union {
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MCentral;
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byte pad[64];
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byte pad[CacheLineSize];
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} central[NumSizeClasses];
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FixAlloc spanalloc; // allocator for Span*
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@ -394,7 +394,7 @@ int32 runtime·checking;
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void runtime·markspan(void *v, uintptr size, uintptr n, bool leftover);
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void runtime·unmarkspan(void *v, uintptr size);
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bool runtime·blockspecial(void*);
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void runtime·setblockspecial(void*);
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void runtime·setblockspecial(void*, bool);
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void runtime·purgecachedstats(M*);
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enum
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@ -419,13 +419,5 @@ enum {
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};
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extern int32 runtime·malloc_profile;
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typedef struct Finalizer Finalizer;
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struct Finalizer
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{
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Finalizer *next; // for use by caller of getfinalizer
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void (*fn)(void*);
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void *arg;
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int32 nret;
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};
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Finalizer* runtime·getfinalizer(void*, bool);
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bool runtime·getfinalizer(void *p, bool del, void (**fn)(void*), int32 *nret);
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void runtime·walkfintab(void (*fn)(void*));
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// See malloc.h for an overview.
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#include "runtime.h"
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#include "arch.h"
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#include "malloc.h"
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void*
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// so that it is faster to move those lists between MCaches and MCentrals.
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#include "runtime.h"
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#include "arch.h"
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#include "malloc.h"
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static bool MCentral_Grow(MCentral *c);
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// license that can be found in the LICENSE file.
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#include "runtime.h"
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#include "arch.h"
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#include "malloc.h"
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// Lock to protect finalizer data structures.
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// Cannot reuse mheap.Lock because the finalizer
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// maintenance requires allocation.
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static Lock finlock;
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enum { debug = 0 };
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typedef struct Fin Fin;
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struct Fin
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{
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void (*fn)(void*);
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int32 nret;
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};
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// Finalizer hash table. Direct hash, linear scan, at most 3/4 full.
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// Table size is power of 3 so that hash can be key % max.
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@ -20,15 +25,24 @@ static Lock finlock;
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typedef struct Fintab Fintab;
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struct Fintab
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{
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Lock;
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void **key;
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Finalizer **val;
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Fin *val;
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int32 nkey; // number of non-nil entries in key
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int32 ndead; // number of dead (-1) entries in key
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int32 max; // size of key, val allocations
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};
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#define TABSZ 17
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#define TAB(p) (&fintab[((uintptr)(p)>>3)%TABSZ])
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static struct {
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Fintab;
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uint8 pad[CacheLineSize - sizeof(Fintab)];
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} fintab[TABSZ];
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static void
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addfintab(Fintab *t, void *k, Finalizer *v)
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addfintab(Fintab *t, void *k, void (*fn)(void*), int32 nret)
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{
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int32 i, j;
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@ -51,29 +65,31 @@ addfintab(Fintab *t, void *k, Finalizer *v)
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ret:
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t->key[i] = k;
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t->val[i] = v;
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t->val[i].fn = fn;
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t->val[i].nret = nret;
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}
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static Finalizer*
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lookfintab(Fintab *t, void *k, bool del)
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static bool
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lookfintab(Fintab *t, void *k, bool del, Fin *f)
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{
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int32 i, j;
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Finalizer *v;
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if(t->max == 0)
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return nil;
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return false;
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i = (uintptr)k % (uintptr)t->max;
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for(j=0; j<t->max; j++) {
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if(t->key[i] == nil)
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return nil;
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return false;
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if(t->key[i] == k) {
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v = t->val[i];
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if(f)
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*f = t->val[i];
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if(del) {
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t->key[i] = (void*)-1;
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t->val[i] = nil;
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t->val[i].fn = nil;
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t->val[i].nret = 0;
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t->ndead++;
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}
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return v;
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return true;
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}
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if(++i == t->max)
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i = 0;
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@ -81,88 +97,100 @@ lookfintab(Fintab *t, void *k, bool del)
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// cannot happen - table is known to be non-full
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runtime·throw("finalizer table inconsistent");
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return nil;
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return false;
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}
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static Fintab fintab;
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// add finalizer; caller is responsible for making sure not already in table
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void
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runtime·addfinalizer(void *p, void (*f)(void*), int32 nret)
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static void
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resizefintab(Fintab *tab)
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{
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Fintab newtab;
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void *k;
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int32 i;
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byte *base;
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Finalizer *e;
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runtime·memclr((byte*)&newtab, sizeof newtab);
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newtab.max = tab->max;
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if(newtab.max == 0)
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newtab.max = 3*3*3;
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else if(tab->ndead < tab->nkey/2) {
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// grow table if not many dead values.
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// otherwise just rehash into table of same size.
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newtab.max *= 3;
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}
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e = nil;
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if(f != nil) {
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e = runtime·mal(sizeof *e);
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e->fn = f;
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e->nret = nret;
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newtab.key = runtime·mallocgc(newtab.max*sizeof newtab.key[0], FlagNoPointers, 0, 1);
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newtab.val = runtime·mallocgc(newtab.max*sizeof newtab.val[0], 0, 0, 1);
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for(i=0; i<tab->max; i++) {
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k = tab->key[i];
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if(k != nil && k != (void*)-1)
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addfintab(&newtab, k, tab->val[i].fn, tab->val[i].nret);
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}
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runtime·free(tab->key);
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runtime·free(tab->val);
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tab->key = newtab.key;
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tab->val = newtab.val;
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tab->nkey = newtab.nkey;
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tab->ndead = newtab.ndead;
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tab->max = newtab.max;
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}
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runtime·lock(&finlock);
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if(!runtime·mlookup(p, &base, nil, nil) || p != base) {
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runtime·unlock(&finlock);
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runtime·throw("addfinalizer on invalid pointer");
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bool
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runtime·addfinalizer(void *p, void (*f)(void*), int32 nret)
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{
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Fintab *tab;
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byte *base;
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|
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if(debug) {
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if(!runtime·mlookup(p, &base, nil, nil) || p != base)
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runtime·throw("addfinalizer on invalid pointer");
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}
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tab = TAB(p);
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runtime·lock(tab);
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if(f == nil) {
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lookfintab(&fintab, p, 1);
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runtime·unlock(&finlock);
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return;
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if(lookfintab(tab, p, true, nil))
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runtime·setblockspecial(p, false);
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runtime·unlock(tab);
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return true;
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}
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if(lookfintab(&fintab, p, 0)) {
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runtime·unlock(&finlock);
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runtime·throw("double finalizer");
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if(lookfintab(tab, p, false, nil)) {
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runtime·unlock(tab);
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return false;
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}
|
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runtime·setblockspecial(p);
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|
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if(fintab.nkey >= fintab.max/2+fintab.max/4) {
|
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if(tab->nkey >= tab->max/2+tab->max/4) {
|
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// keep table at most 3/4 full:
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// allocate new table and rehash.
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|
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runtime·memclr((byte*)&newtab, sizeof newtab);
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newtab.max = fintab.max;
|
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if(newtab.max == 0)
|
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newtab.max = 3*3*3;
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else if(fintab.ndead < fintab.nkey/2) {
|
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// grow table if not many dead values.
|
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// otherwise just rehash into table of same size.
|
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newtab.max *= 3;
|
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}
|
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|
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newtab.key = runtime·mallocgc(newtab.max*sizeof newtab.key[0], FlagNoPointers, 0, 1);
|
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newtab.val = runtime·mallocgc(newtab.max*sizeof newtab.val[0], 0, 0, 1);
|
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|
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for(i=0; i<fintab.max; i++) {
|
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void *k;
|
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|
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k = fintab.key[i];
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if(k != nil && k != (void*)-1)
|
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addfintab(&newtab, k, fintab.val[i]);
|
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}
|
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runtime·free(fintab.key);
|
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runtime·free(fintab.val);
|
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fintab = newtab;
|
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resizefintab(tab);
|
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}
|
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|
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addfintab(&fintab, p, e);
|
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runtime·unlock(&finlock);
|
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addfintab(tab, p, f, nret);
|
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runtime·setblockspecial(p, true);
|
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runtime·unlock(tab);
|
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return true;
|
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}
|
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|
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// get finalizer; if del, delete finalizer.
|
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// caller is responsible for updating RefHasFinalizer bit.
|
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Finalizer*
|
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runtime·getfinalizer(void *p, bool del)
|
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// caller is responsible for updating RefHasFinalizer (special) bit.
|
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bool
|
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runtime·getfinalizer(void *p, bool del, void (**fn)(void*), int32 *nret)
|
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{
|
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Finalizer *f;
|
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Fintab *tab;
|
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bool res;
|
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Fin f;
|
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|
||||
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]);
|
||||
}
|
||||
}
|
||||
|
64
src/pkg/runtime/mfinal_test.go
Normal file
64
src/pkg/runtime/mfinal_test.go
Normal 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()
|
||||
}
|
@ -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,
|
||||
|
@ -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;
|
||||
|
@ -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);
|
||||
|
@ -7,6 +7,7 @@
|
||||
|
||||
package runtime
|
||||
#include "runtime.h"
|
||||
#include "arch.h"
|
||||
#include "malloc.h"
|
||||
#include "defs.h"
|
||||
#include "type.h"
|
||||
|
@ -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];
|
||||
|
@ -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"
|
||||
|
@ -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)
|
||||
|
||||
|
@ -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"
|
||||
|
||||
|
@ -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);
|
||||
|
@ -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*
|
||||
|
@ -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"
|
||||
|
||||
|
@ -4,6 +4,7 @@
|
||||
|
||||
package runtime
|
||||
#include "runtime.h"
|
||||
#include "arch.h"
|
||||
#include "malloc.h"
|
||||
|
||||
String runtime·emptystring;
|
||||
|
@ -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"
|
||||
|
@ -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)
|
||||
|
@ -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()
|
||||
|
Loading…
Reference in New Issue
Block a user