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MDEV-7324 - Lock-free hash for table definition cache

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This commit is contained in:
Sergey Vojtovich
2014-12-28 19:42:17 +04:00
parent 8883c54ac0
commit 6dbc48ca79
22 changed files with 911 additions and 773 deletions
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46
sql/sql_test.cc
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@@ -76,35 +76,37 @@ print_where(COND *cond,const char *info, enum_query_type query_type)
/* This is for debugging purposes */
static my_bool print_cached_tables_callback(TDC_element *element,
void *arg __attribute__((unused)))
{
TABLE *entry;
mysql_mutex_lock(&element->LOCK_table_share);
TDC_element::All_share_tables_list::Iterator it(element->all_tables);
while ((entry= it++))
{
THD *in_use= entry->in_use;
printf("%-14.14s %-32s%6ld%8ld%6d %s\n",
entry->s->db.str, entry->s->table_name.str, element->version,
in_use ? in_use->thread_id : 0,
entry->db_stat ? 1 : 0,
in_use ? lock_descriptions[(int)entry->reginfo.lock_type] :
"Not in use");
}
mysql_mutex_unlock(&element->LOCK_table_share);
return FALSE;
}
static void print_cached_tables(void)
{
TABLE_SHARE *share;
TABLE *entry;
TDC_iterator tdc_it;
compile_time_assert(TL_WRITE_ONLY+1 == array_elements(lock_descriptions));
/* purecov: begin tested */
puts("DB Table Version Thread Open Lock");
tdc_it.init();
while ((share= tdc_it.next()))
{
mysql_mutex_lock(&share->tdc.LOCK_table_share);
TABLE_SHARE::All_share_tables_list::Iterator it(share->tdc.all_tables);
while ((entry= it++))
{
THD *in_use= entry->in_use;
printf("%-14.14s %-32s%6ld%8ld%6d %s\n",
entry->s->db.str, entry->s->table_name.str, entry->s->tdc.version,
in_use ? in_use->thread_id : 0,
entry->db_stat ? 1 : 0,
in_use ? lock_descriptions[(int)entry->reginfo.lock_type] :
"Not in use");
}
mysql_mutex_unlock(&share->tdc.LOCK_table_share);
}
tdc_it.deinit();
tdc_iterate(0, (my_hash_walk_action) print_cached_tables_callback, NULL, true);
printf("\nCurrent refresh version: %ld\n", tdc_refresh_version());
fflush(stdout);
/* purecov: end */