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Add disk caching code and first draft of fractional index.
This commit is contained in:
rsc 2004-03-12 18:28:14 +00:00
parent 7c5190d2c8
commit 9ffbb5adca
15 changed files with 453 additions and 366 deletions
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34
src/cmd/venti/dcache.c
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@ -230,7 +230,6 @@ dirtydblock(DBlock *b, int dirty)
int odirty;
Part *p;
fprint(2, "dirty %p\n", b);
rlock(&dcache.dirtylock);
assert(b->ref != 0);
assert(b->dirtying == 0);
@ -242,8 +241,16 @@ fprint(2, "dirty %p\n", b);
stats.dirtydblocks++;
qunlock(&stats.lock);
/*
* In general, shouldn't mark any block as more than one
* type, except that split index blocks are a subcase of index
* blocks. Only clean blocks ever get marked DirtyIndexSplit,
* though, so we don't need the opposite conjunction here.
*/
if(b->dirty)
assert(b->dirty == dirty);
assert(b->dirty == dirty
|| (b->dirty==DirtyIndexSplit && dirty==DirtyIndex));
odirty = b->dirty;
b->dirty = dirty;
p = b->part;
@ -533,7 +540,7 @@ flushtimerproc(void *v)
static void
flushproc(void *v)
{
int i, n;
int i, j, n;
DBlock *b, **write;
USED(v);
@ -575,25 +582,10 @@ flushproc(void *v)
qsort(write, n, sizeof(write[0]), writeblockcmp);
/*
* At the beginning of the array are the arena blocks.
*/
fprint(2, "flushproc: write arena blocks\n");
/* Write each stage of blocks out. */
i = 0;
i += parallelwrites(write+i, write+n, DirtyArena);
/*
* Next are the index blocks.
*/
fprint(2, "flushproc: write index blocks\n");
i += parallelwrites(write+i, write+n, DirtyIndex);
/*
* Finally, the arena clump info blocks.
*/
fprint(2, "flushproc: write cib blocks\n");
i += parallelwrites(write+i, write+n, DirtyArenaCib);
for(j=1; j<DirtyMax; j++)
i += parallelwrites(write+i, write+n, j);
assert(i == n);
fprint(2, "flushproc: update dirty bits\n");