#include "db_config.h"
#ifndef lint
static const char revid[] = "$Id: mp_trickle.c,v 1.2 2004/03/30 01:23:44 jtownsen Exp $";
#endif
#ifndef NO_SYSTEM_INCLUDES
#include <sys/types.h>
#include <stdlib.h>
#endif
#include "db_int.h"
#include "dbinc/db_shash.h"
#include "dbinc/log.h"
#include "dbinc/mp.h"
static int __memp_trickle __P((DB_ENV *, int, int *));
int
__memp_trickle_pp(dbenv, pct, nwrotep)
DB_ENV *dbenv;
int pct, *nwrotep;
{
int rep_check, ret;
PANIC_CHECK(dbenv);
ENV_REQUIRES_CONFIG(dbenv,
dbenv->mp_handle, "memp_trickle", DB_INIT_MPOOL);
rep_check = IS_ENV_REPLICATED(dbenv) ? 1 : 0;
if (rep_check)
__env_rep_enter(dbenv);
ret = __memp_trickle(dbenv, pct, nwrotep);
if (rep_check)
__env_rep_exit(dbenv);
return (ret);
}
static int
__memp_trickle(dbenv, pct, nwrotep)
DB_ENV *dbenv;
int pct, *nwrotep;
{
DB_MPOOL *dbmp;
MPOOL *c_mp, *mp;
u_int32_t dirty, i, total, dtmp;
int n, ret, wrote;
dbmp = dbenv->mp_handle;
mp = dbmp->reginfo[0].primary;
if (nwrotep != NULL)
*nwrotep = 0;
if (pct < 1 || pct > 100)
return (EINVAL);
for (ret = 0, i = dirty = total = 0; i < mp->nreg; ++i) {
c_mp = dbmp->reginfo[i].primary;
total += c_mp->stat.st_pages;
__memp_stat_hash(&dbmp->reginfo[i], c_mp, &dtmp);
dirty += dtmp;
}
n = ((total * pct) / 100) - (total - dirty);
if (dirty == 0 || n <= 0)
return (0);
if (nwrotep == NULL)
nwrotep = &wrote;
ret = __memp_sync_int(dbenv, NULL, n, DB_SYNC_TRICKLE, nwrotep);
mp->stat.st_page_trickle += *nwrotep;
return (ret);
}