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r17410@catbus: nickm | 2007-12-27 09:20:27 -0500

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Exciting new entries in buf_dump_freelist_sizes() to make sure our freelist sizes are reasonable.


svn:r12996
This commit is contained in:
Nick Mathewson 2007-12-27 14:20:30 +00:00
parent 1a2b6c2ae3
commit d7f5a73173
1 changed files with 22 additions and 3 deletions
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25
src/or/buffers.c
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@ -105,11 +105,14 @@ typedef struct chunk_freelist_t {
int cur_length; /**< How many chunks on the freelist now? */
int lowest_length; /**< What's the smallest value of cur_length since the
* last time we cleaned this freelist? */
uint64_t n_alloc;
uint64_t n_free;
uint64_t n_hit;
chunk_t *head; /**< First chunk on the freelist. */
} chunk_freelist_t;
/** Macro to help define freelists. */
#define FL(a,m,s) { a, m, s, 0, 0, NULL }
#define FL(a,m,s) { a, m, s, 0, 0, 0, 0, 0, NULL }
/** Static array of freelists, sorted by alloc_len, terminated by an entry
* with alloc_size of 0. */
@ -119,6 +122,7 @@ static chunk_freelist_t freelists[] = {
FL(8192, 128, 4), FL(16384, 64, 4), FL(0, 0, 0)
};
#undef FL
static uint64_t n_freelist_miss = 0;
static void assert_freelist_ok(chunk_freelist_t *fl);
@ -147,6 +151,8 @@ chunk_free(chunk_t *chunk)
freelist->head = chunk;
++freelist->cur_length;
} else {
if (freelist)
++freelist->n_free;
tor_free(chunk);
}
}
@ -166,8 +172,13 @@ chunk_new_with_alloc_size(size_t alloc)
freelist->head = ch->next;
if (--freelist->cur_length < freelist->lowest_length)
freelist->lowest_length = freelist->cur_length;
++freelist->n_hit;
} else {
/* XXXX020 take advantage of tor_malloc_roundup. */
if (freelist)
++freelist->n_alloc;
else
++n_freelist_miss;
ch = tor_malloc(alloc);
}
ch->next = NULL;
@ -247,6 +258,7 @@ buf_shrink_freelists(int free_all)
tor_free(chunk);
chunk = next;
--n_to_free;
++freelists[i].n_free;
}
tor_assert(!n_to_free);
freelists[i].cur_length = new_length;
@ -267,9 +279,16 @@ buf_dump_freelist_sizes(int severity)
uint64_t total = ((uint64_t)freelists[i].cur_length) *
freelists[i].alloc_size;
log(severity, LD_MM,
U64_FORMAT" bytes in %d %d-byte chunks", U64_PRINTF_ARG(total),
freelists[i].cur_length, (int)freelists[i].alloc_size);
U64_FORMAT" bytes in %d %d-byte chunks ["U64_FORMAT
" misses; "U64_FORMAT" frees; "U64_FORMAT" hits]",
U64_PRINTF_ARG(total),
freelists[i].cur_length, (int)freelists[i].alloc_size,
U64_PRINTF_ARG(freelists[i].n_alloc),
U64_PRINTF_ARG(freelists[i].n_free),
U64_PRINTF_ARG(freelists[i].n_hit));
}
log(severity, LD_MM, U64_FORMAT" allocations in non-freelist sizes",
U64_PRINTF_ARG(n_freelist_miss));
}
/** Magic value for buf_t.magic, to catch pointer errors. */