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Small performance improvement to the dirty list handling in the pager.

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FossilOrigin-Name: b332a84d5154f70f3197537df4af243eaebbb011
This commit is contained in:
drh
2014-09-12 20:30:59 +00:00
parent 236241aeb0
commit 36ce91913c
3 changed files with 14 additions and 14 deletions
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12
manifest
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@@ -1,5 +1,5 @@
C Simplify\sthe\sway\sthe\scolumn\scache\sis\smanaged\saround\sOP_Move\sinstructions. C Small\sperformance\simprovement\sto\sthe\sdirty\slist\shandling\sin\sthe\spager.
D 2014-09-12T17:41:30.440 D 2014-09-12T20:30:59.762
F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
F Makefile.in cf57f673d77606ab0f2d9627ca52a9ba1464146a F Makefile.in cf57f673d77606ab0f2d9627ca52a9ba1464146a
F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23 F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@ -217,7 +217,7 @@ F src/os_win.h 09e751b20bbc107ffbd46e13555dc73576d88e21
F src/pager.c c6c809987f0c6a4e27634099d062d425527de173 F src/pager.c c6c809987f0c6a4e27634099d062d425527de173
F src/pager.h ffd5607f7b3e4590b415b007a4382f693334d428 F src/pager.h ffd5607f7b3e4590b415b007a4382f693334d428
F src/parse.y 22d6a074e5f5a7258947a1dc55a9bf946b765dd0 F src/parse.y 22d6a074e5f5a7258947a1dc55a9bf946b765dd0
F src/pcache.c 2048affdb09a04478b5fc6e64cb1083078d369be F src/pcache.c b42c513da255c33e99dc0e23d16c3caf30dc9175
F src/pcache.h 9b559127b83f84ff76d735c8262f04853be0c59a F src/pcache.h 9b559127b83f84ff76d735c8262f04853be0c59a
F src/pcache1.c dab8ab930d4a73b99768d881185994f34b80ecaa F src/pcache1.c dab8ab930d4a73b99768d881185994f34b80ecaa
F src/pragma.c 3f3e959390a10c0131676f0e307acce372777e0f F src/pragma.c 3f3e959390a10c0131676f0e307acce372777e0f
@@ -1197,7 +1197,7 @@ F tool/vdbe_profile.tcl 67746953071a9f8f2f668b73fe899074e2c6d8c1
F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4 F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
F tool/warnings.sh 0abfd78ceb09b7f7c27c688c8e3fe93268a13b32 F tool/warnings.sh 0abfd78ceb09b7f7c27c688c8e3fe93268a13b32
F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
P 2f69a1fa6adc9377149ae7faa586a5d30b6a631b P 320556233e19cdd9d590a09655c3465754700d39
R 2196198b201612a018f7c15a4c2f1424 R 576d19acba6677524711080ef6f39102
U drh U drh
Z a609740927532bd8f27cb3bc904eb4ff Z 60cbf2357ae42b4a38f44133d16be246

2
manifest.uuid
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@@ -1 +1 @@
320556233e19cdd9d590a09655c3465754700d39 b332a84d5154f70f3197537df4af243eaebbb011

14
src/pcache.c
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@@ -116,14 +116,14 @@ static void pcacheManageDirtyList(PgHdr *pPage, u8 addRemove){
if( pPage->pDirtyNext ){ if( pPage->pDirtyNext ){
assert( pPage->pDirtyNext->pDirtyPrev==0 ); assert( pPage->pDirtyNext->pDirtyPrev==0 );
pPage->pDirtyNext->pDirtyPrev = pPage; pPage->pDirtyNext->pDirtyPrev = pPage;
}else if( p->bPurgeable ){ }else{
assert( p->eCreate==2 ); p->pDirtyTail = pPage;
p->eCreate = 1; if( p->bPurgeable ){
assert( p->eCreate==2 );
p->eCreate = 1;
}
} }
p->pDirty = pPage; p->pDirty = pPage;
if( !p->pDirtyTail ){
p->pDirtyTail = pPage;
}
if( !p->pSynced && 0==(pPage->flags&PGHDR_NEED_SYNC) ){ if( !p->pSynced && 0==(pPage->flags&PGHDR_NEED_SYNC) ){
p->pSynced = pPage; p->pSynced = pPage;
} }
@@ -399,7 +399,7 @@ void SQLITE_NOINLINE sqlite3PcacheRelease(PgHdr *p){
p->pCache->nRef--; p->pCache->nRef--;
if( (p->flags&PGHDR_DIRTY)==0 ){ if( (p->flags&PGHDR_DIRTY)==0 ){
pcacheUnpin(p); pcacheUnpin(p);
}else{ }else if( p->pDirtyPrev!=0 ){
/* Move the page to the head of the dirty list. */ /* Move the page to the head of the dirty list. */
pcacheManageDirtyList(p, PCACHE_DIRTYLIST_FRONT); pcacheManageDirtyList(p, PCACHE_DIRTYLIST_FRONT);
} }