License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include "tdb_private.h"
-#include <ccan/tally/tally.h>
#define SUMMARY_FORMAT \
"Size of file/data: %u/%zu\n" \
"Number of records: %zu\n" \
- "Smallest/average/largest keys: %zu/%zu/%zu\n%s" \
- "Smallest/average/largest data: %zu/%zu/%zu\n%s" \
- "Smallest/average/largest padding: %zu/%zu/%zu\n%s" \
+ "Smallest/average/largest keys: %zu/%zu/%zu\n" \
+ "Smallest/average/largest data: %zu/%zu/%zu\n" \
+ "Smallest/average/largest padding: %zu/%zu/%zu\n" \
"Number of dead records: %zu\n" \
- "Smallest/average/largest dead records: %zu/%zu/%zu\n%s" \
+ "Smallest/average/largest dead records: %zu/%zu/%zu\n" \
"Number of free records: %zu\n" \
- "Smallest/average/largest free records: %zu/%zu/%zu\n%s" \
+ "Smallest/average/largest free records: %zu/%zu/%zu\n" \
"Number of hash chains: %zu\n" \
- "Smallest/average/largest hash chains: %zu/%zu/%zu\n%s" \
+ "Smallest/average/largest hash chains: %zu/%zu/%zu\n" \
"Number of uncoalesced records: %zu\n" \
- "Smallest/average/largest uncoalesced runs: %zu/%zu/%zu\n%s" \
+ "Smallest/average/largest uncoalesced runs: %zu/%zu/%zu\n" \
"Percentage keys/data/padding/free/dead/rechdrs&tailers/hashes: %.0f/%.0f/%.0f/%.0f/%.0f/%.0f/%.0f\n"
-#define HISTO_WIDTH 70
-#define HISTO_HEIGHT 20
+/* We don't use tally module, to keep upstream happy. */
+struct tally {
+ size_t min, max, total;
+ size_t num;
+};
-/* Slow, but should be very rare. */
-static size_t dead_space(struct tdb_context *tdb, tdb_off_t off)
+static void tally_init(struct tally *tally)
{
- size_t len;
+ tally->total = 0;
+ tally->num = 0;
+ tally->min = tally->max = 0;
+}
- for (len = 0; off + len < tdb->map_size; len++) {
- char c;
- if (tdb->methods->tdb_read(tdb, off, &c, 1, 0))
- return 0;
- if (c != 0 && c != 0x42)
- break;
- }
- return len;
+static void tally_add(struct tally *tally, size_t len)
+{
+ if (tally->num == 0)
+ tally->max = tally->min = len;
+ else if (len > tally->max)
+ tally->max = len;
+ else if (len < tally->min)
+ tally->min = len;
+ tally->num++;
+ tally->total += len;
+}
+
+static size_t tally_mean(const struct tally *tally)
+{
+ if (!tally->num)
+ return 0;
+ return tally->total / tally->num;
}
static size_t get_hash_length(struct tdb_context *tdb, unsigned int i)
return count;
}
-char *tdb_summary(struct tdb_context *tdb, enum tdb_summary_flags flags)
+char *tdb_summary(struct tdb_context *tdb)
{
tdb_off_t off;
- struct tally *freet, *keys, *data, *dead, *extra, *hash, *uncoal;
- char *freeg, *keysg, *datag, *deadg, *extrag, *hashg, *uncoalg;
+ struct tally freet, keys, data, dead, extra, hash, uncoal;
struct tdb_record rec;
char *ret = NULL;
bool locked;
size_t len, unc = 0;
- freeg = keysg = datag = deadg = extrag = hashg = uncoalg = NULL;
-
/* Read-only databases use no locking at all: it's best-effort.
* We may have a write lock already, so skip that case too. */
if (tdb->read_only || tdb->allrecord_lock.count != 0) {
locked = true;
}
- freet = tally_new(HISTO_HEIGHT);
- keys = tally_new(HISTO_HEIGHT);
- data = tally_new(HISTO_HEIGHT);
- dead = tally_new(HISTO_HEIGHT);
- extra = tally_new(HISTO_HEIGHT);
- hash = tally_new(HISTO_HEIGHT);
- uncoal = tally_new(HISTO_HEIGHT);
- if (!freet || !keys || !data || !dead || !extra || !hash || !uncoal) {
- tdb->ecode = TDB_ERR_OOM;
- goto unlock;
- }
+ tally_init(&freet);
+ tally_init(&keys);
+ tally_init(&data);
+ tally_init(&dead);
+ tally_init(&extra);
+ tally_init(&hash);
+ tally_init(&uncoal);
for (off = TDB_DATA_START(tdb->header.hash_size);
off < tdb->map_size - 1;
goto unlock;
switch (rec.magic) {
case TDB_MAGIC:
- tally_add(keys, rec.key_len);
- tally_add(data, rec.data_len);
- tally_add(extra, rec.rec_len - (rec.key_len
- + rec.data_len));
+ tally_add(&keys, rec.key_len);
+ tally_add(&data, rec.data_len);
+ tally_add(&extra, rec.rec_len - (rec.key_len
+ + rec.data_len));
+ if (unc > 1)
+ tally_add(&uncoal, unc - 1);
+ unc = 0;
break;
case TDB_FREE_MAGIC:
- tally_add(freet, rec.rec_len);
+ tally_add(&freet, rec.rec_len);
unc++;
break;
/* If we crash after ftruncate, we can get zeroes or fill. */
case TDB_RECOVERY_INVALID_MAGIC:
case 0x42424242:
unc++;
- rec.rec_len = dead_space(tdb, off) - sizeof(rec);
+ rec.rec_len = tdb_dead_space(tdb, off) - sizeof(rec);
/* Fall through */
case TDB_DEAD_MAGIC:
- tally_add(dead, rec.rec_len);
+ tally_add(&dead, rec.rec_len);
break;
default:
TDB_LOG((tdb, TDB_DEBUG_ERROR,
rec.magic, off));
goto unlock;
}
-
- if (unc &&
- (rec.magic == TDB_MAGIC || rec.magic == TDB_DEAD_MAGIC)) {
- tally_add(uncoal, unc);
- unc = 0;
- }
}
- if (unc)
- tally_add(uncoal, unc);
+ if (unc > 1)
+ tally_add(&uncoal, unc - 1);
for (off = 0; off < tdb->header.hash_size; off++)
- tally_add(hash, get_hash_length(tdb, off));
-
- if (flags & TDB_SUMMARY_HISTOGRAMS) {
- freeg = tally_histogram(freet, HISTO_WIDTH, HISTO_HEIGHT);
- keysg = tally_histogram(keys, HISTO_WIDTH, HISTO_HEIGHT);
- datag = tally_histogram(data, HISTO_WIDTH, HISTO_HEIGHT);
- deadg = tally_histogram(dead, HISTO_WIDTH, HISTO_HEIGHT);
- extrag = tally_histogram(extra, HISTO_WIDTH, HISTO_HEIGHT);
- hashg = tally_histogram(hash, HISTO_WIDTH, HISTO_HEIGHT);
- uncoalg = tally_histogram(uncoal, HISTO_WIDTH, HISTO_HEIGHT);
- }
+ tally_add(&hash, get_hash_length(tdb, off));
/* 20 is max length of a %zu. */
- len = strlen(SUMMARY_FORMAT) + 29*20 + 1
- + (freeg ? strlen(freeg) : 0)
- + (keysg ? strlen(keysg) : 0)
- + (datag ? strlen(datag) : 0)
- + (deadg ? strlen(deadg) : 0)
- + (extrag ? strlen(extrag) : 0)
- + (hashg ? strlen(hashg) : 0)
- + (uncoalg ? strlen(uncoalg) : 0);
+ len = strlen(SUMMARY_FORMAT) + 35*20 + 1;
ret = malloc(len);
if (!ret)
goto unlock;
sprintf(ret, SUMMARY_FORMAT,
- tdb->map_size, tally_total(keys, NULL)+tally_total(data, NULL),
- tally_num(keys),
- tally_min(keys), tally_mean(keys), tally_max(keys),
- keysg ? keysg : "",
- tally_min(data), tally_mean(data), tally_max(data),
- datag ? datag : "",
- tally_min(extra), tally_mean(extra), tally_max(extra),
- extrag ? extrag : "",
- tally_num(dead),
- tally_min(dead), tally_mean(dead), tally_max(dead),
- deadg ? deadg : "",
- tally_num(freet),
- tally_min(freet), tally_mean(freet), tally_max(freet),
- freeg ? freeg : "",
- tally_num(hash),
- tally_min(hash), tally_mean(hash), tally_max(hash),
- hashg ? hashg : "",
- tally_total(uncoal, NULL),
- tally_min(uncoal), tally_mean(uncoal), tally_max(uncoal),
- uncoalg ? uncoalg : "",
- tally_total(keys, NULL) * 100.0 / tdb->map_size,
- tally_total(data, NULL) * 100.0 / tdb->map_size,
- tally_total(extra, NULL) * 100.0 / tdb->map_size,
- tally_total(freet, NULL) * 100.0 / tdb->map_size,
- tally_total(dead, NULL) * 100.0 / tdb->map_size,
- (tally_num(keys) + tally_num(freet) + tally_num(dead))
+ tdb->map_size, keys.total+data.total,
+ keys.num,
+ keys.min, tally_mean(&keys), keys.max,
+ data.min, tally_mean(&data), data.max,
+ extra.min, tally_mean(&extra), extra.max,
+ dead.num,
+ dead.min, tally_mean(&dead), dead.max,
+ freet.num,
+ freet.min, tally_mean(&freet), freet.max,
+ hash.num,
+ hash.min, tally_mean(&hash), hash.max,
+ uncoal.total,
+ uncoal.min, tally_mean(&uncoal), uncoal.max,
+ keys.total * 100.0 / tdb->map_size,
+ data.total * 100.0 / tdb->map_size,
+ extra.total * 100.0 / tdb->map_size,
+ freet.total * 100.0 / tdb->map_size,
+ dead.total * 100.0 / tdb->map_size,
+ (keys.num + freet.num + dead.num)
* (sizeof(struct tdb_record) + sizeof(uint32_t))
* 100.0 / tdb->map_size,
tdb->header.hash_size * sizeof(tdb_off_t)
* 100.0 / tdb->map_size);
unlock:
- free(freeg);
- free(keysg);
- free(datag);
- free(deadg);
- free(extrag);
- free(hashg);
- free(uncoalg);
- free(freet);
- free(keys);
- free(data);
- free(dead);
- free(extra);
- free(hash);
- free(uncoal);
if (locked) {
tdb_unlockall_read(tdb);
}
projects / ccan / blobdiff