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sync with mit plan 9 version

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This commit is contained in:
rsc 2007-04-21 19:40:55 +00:00
parent 33433b3fde
commit 27d2809820
28 changed files with 456 additions and 371 deletions
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52
src/cmd/venti/srv/cmparenas.c
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@ -51,21 +51,64 @@ readblock(int fd, uchar *buf, int n)
return 0;
}
static int
printheader(char *name, ArenaHead *head, int fd)
{
Arena arena;
vlong baseoff, lo, hi, off;
int clumpmax;
off = seek(fd, 0, 1);
seek(fd, off + head->size - head->blocksize, 0);
if(readblock(fd, data, head->blocksize) < 0){
fprint(2, "%s: reading arena tail: %r\n", name);
return -1;
}
seek(fd, off, 0);
memset(&arena, 0, sizeof arena);
if(unpackarena(&arena, data) < 0){
fprint(2, "%s: unpack arena tail: %r\n", name);
return -1;
}
arena.blocksize = head->blocksize;
arena.base = off + head->blocksize;
arena.clumpmax = arena.blocksize / ClumpInfoSize;
arena.size = head->size - 2*head->blocksize;
fprint(2, "%s: base=%llx size=%llx blocksize=%x\n", name, off, head->size, head->blocksize);
baseoff = head->blocksize;
fprint(2, "\t%llx-%llx: head\n", (vlong)0, baseoff);
lo = baseoff;
hi = baseoff + arena.diskstats.used;
fprint(2, "\t%llx-%llx: data (%llx)\n", lo, hi, hi - lo);
hi = head->size - head->blocksize;
clumpmax = head->blocksize / ClumpInfoSize;
if(clumpmax > 0)
lo = hi - (u64int)arena.diskstats.clumps/clumpmax * head->blocksize;
else
lo = hi;
fprint(2, "\t%llx-%llx: clumps (%llx)\n", lo, hi, hi - lo);
fprint(2, "\t%llx-%llx: tail\n", hi, hi + head->blocksize);
fprint(2, "arena:\n");
printarena(2, &arena);
return 0;
}
static void
cmparena(char *name, vlong len)
{
Arena arena;
ArenaHead head;
DigestState s;
u64int n, e;
u32int bs;
u8int score[VtScoreSize];
int i, j;
char buf[20];
fprint(2, "cmp %s\n", name);
memset(&arena, 0, sizeof arena);
memset(&s, 0, sizeof s);
/*
@ -104,6 +147,9 @@ cmparena(char *name, vlong len)
seek(fd, -HeadSize, 1);
seek(fd1, -HeadSize, 1);
if(printheader(name, &head, fd) < 0)
return;
/*
* now we know how much to read
* read everything but the last block, which is special