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Don't allocate 16MB code cache at startup. Instead use an exponentially increasing growth factor.

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This commit is contained in:
Andreas Gal 2008-07-02 00:42:40 -07:00
parent 08bd8d4245
commit 31ef2f7b34
3 changed files with 14 additions and 2 deletions
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14
js/src/nanojit/Fragmento.cpp
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@ -57,6 +57,7 @@ namespace nanojit
GC *gc = core->GetGC();
_frags = new (gc) FragmentMap(gc, 128);
_assm = new (gc) nanojit::Assembler(this);
_pageGrowth = 1;
verbose_only( enterCounts = new (gc) BlockHist(gc); )
verbose_only( mergeCounts = new (gc) BlockHist(gc); )
}
@ -79,8 +80,11 @@ namespace nanojit
Page* Fragmento::pageAlloc()
{
NanoAssert(sizeof(Page) == NJ_PAGE_SIZE);
if (!_pageList)
pagesGrow(NJ_PAGES); // try to get more mem
if (!_pageList) {
pagesGrow(_pageGrowth); // try to get more mem
if ((_pageGrowth << 1) < (uint32_t)NJ_PAGES)
_pageGrowth <<= 1;
}
Page *page = _pageList;
if (page)
{
@ -110,6 +114,12 @@ namespace nanojit
Page* memory = 0;
if (NJ_UNLIMITED_GROWTH || _stats.pages < (uint32_t)NJ_PAGES)
{
// make sure we don't grow beyond NJ_PAGES
if (_stats.pages + count > (uint32)NJ_PAGES)
count = NJ_PAGES - _stats.pages;
if (count < 0)
count = 0;
// @todo nastiness that needs a fix'n
_gcHeap = _core->GetGC()->GetGCHeap();
NanoAssert(NJ_PAGE_SIZE<=_gcHeap->kNativePageSize);

1
js/src/nanojit/Fragmento.h
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@ -133,6 +133,7 @@ namespace nanojit
DWB(Assembler*) _assm;
DWB(FragmentMap*) _frags; /* map from ip -> Fragment ptr */
Page* _pageList;
uint32_t _pageGrowth;
/* unmanaged mem */
AllocList _allocList;

1
js/src/trace.js
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@ -8,3 +8,4 @@ f = function() {
var before = Date.now();
f();
var after = Date.now();
print(after - before);