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include/myisam.h:
  Auto merged
myisam/myisamchk.c:
  Auto merged
This commit is contained in:
unknown
2002-06-30 16:14:48 +00:00
parent 422d3873af 4d10683775
commit fa87affa0c
6 changed files with 149 additions and 75 deletions
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2
include/my_sys.h
View File

@ -666,8 +666,6 @@ extern int _my_b_read_r(IO_CACHE *info,byte *Buffer,uint Count);
extern void init_io_cache_share(IO_CACHE *info, extern void init_io_cache_share(IO_CACHE *info,
IO_CACHE_SHARE *s, uint num_threads); IO_CACHE_SHARE *s, uint num_threads);
extern void remove_io_thread(IO_CACHE *info); extern void remove_io_thread(IO_CACHE *info);
int lock_io_cache(IO_CACHE *);
void unlock_io_cache(IO_CACHE *);
#endif #endif
extern int _my_b_seq_read(IO_CACHE *info,byte *Buffer,uint Count); extern int _my_b_seq_read(IO_CACHE *info,byte *Buffer,uint Count);
extern int _my_b_net_read(IO_CACHE *info,byte *Buffer,uint Count); extern int _my_b_net_read(IO_CACHE *info,byte *Buffer,uint Count);

4
include/myisam.h
View File

@ -384,7 +384,7 @@ typedef struct st_mi_sort_param
IO_CACHE tempfile, tempfile_for_exceptions; IO_CACHE tempfile, tempfile_for_exceptions;
DYNAMIC_ARRAY buffpek; DYNAMIC_ARRAY buffpek;
my_off_t pos,max_pos,filepos,start_recpos; my_off_t pos,max_pos,filepos,start_recpos;
my_bool fix_datafile; my_bool fix_datafile, master;
char *record; char *record;
char *tmpdir; char *tmpdir;
int (*key_cmp)(struct st_mi_sort_param *, const void *, const void *); int (*key_cmp)(struct st_mi_sort_param *, const void *, const void *);
@ -406,6 +406,8 @@ int mi_repair(MI_CHECK *param, register MI_INFO *info,
int mi_sort_index(MI_CHECK *param, register MI_INFO *info, my_string name); int mi_sort_index(MI_CHECK *param, register MI_INFO *info, my_string name);
int mi_repair_by_sort(MI_CHECK *param, register MI_INFO *info, int mi_repair_by_sort(MI_CHECK *param, register MI_INFO *info,
const char * name, int rep_quick); const char * name, int rep_quick);
int mi_repair_parallel(MI_CHECK *param, register MI_INFO *info,
const char * name, int rep_quick);
int change_to_newfile(const char * filename, const char * old_ext, int change_to_newfile(const char * filename, const char * old_ext,
const char * new_ext, uint raid_chunks, const char * new_ext, uint raid_chunks,
myf myflags); myf myflags);

48
myisam/mi_check.c
View File

@ -14,7 +14,7 @@
along with this program; if not, write to the Free Software along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
/* Descript, check and repair of MyISAM tables */ /* Describe, check and repair of MyISAM tables */
#include "ftdefs.h" #include "ftdefs.h"
#include <m_ctype.h> #include <m_ctype.h>
@ -1187,6 +1187,7 @@ int mi_repair(MI_CHECK *param, register MI_INFO *info,
my_seek(info->dfile,0L,MY_SEEK_END,MYF(0)); my_seek(info->dfile,0L,MY_SEEK_END,MYF(0));
sort_info.dupp=0; sort_info.dupp=0;
sort_param.fix_datafile= (my_bool) (! rep_quick); sort_param.fix_datafile= (my_bool) (! rep_quick);
sort_param.master=1;
sort_info.max_records= ~(ha_rows) 0; sort_info.max_records= ~(ha_rows) 0;
set_data_file_type(&sort_info, share); set_data_file_type(&sort_info, share);
@ -1888,6 +1889,7 @@ int mi_repair_by_sort(MI_CHECK *param, register MI_INFO *info,
sort_param.tmpdir=param->tmpdir; sort_param.tmpdir=param->tmpdir;
sort_param.sort_info=&sort_info; sort_param.sort_info=&sort_info;
sort_param.fix_datafile= (my_bool) (! rep_quick); sort_param.fix_datafile= (my_bool) (! rep_quick);
sort_param.master =1;
del=info->state->del; del=info->state->del;
param->glob_crc=0; param->glob_crc=0;
@ -2107,13 +2109,14 @@ err:
DESCRIPTION DESCRIPTION
Same as mi_repair_by_sort but do it multithreaded Same as mi_repair_by_sort but do it multithreaded
Each key is handled by a separate thread. Each key is handled by a separate thread.
TODO: make a number of thread a parameter
RESULT RESULT
0 ok 0 ok
<>0 Error <>0 Error
*/ */
int mi_repair_by_sort_r(MI_CHECK *param, register MI_INFO *info, int mi_repair_parallel(MI_CHECK *param, register MI_INFO *info,
const char * name, int rep_quick) const char * name, int rep_quick)
{ {
int got_error; int got_error;
@ -2131,7 +2134,7 @@ int mi_repair_by_sort_r(MI_CHECK *param, register MI_INFO *info,
SORT_INFO sort_info; SORT_INFO sort_info;
ulonglong key_map=share->state.key_map; ulonglong key_map=share->state.key_map;
pthread_attr_t thr_attr; pthread_attr_t thr_attr;
DBUG_ENTER("mi_repair_by_sort_r"); DBUG_ENTER("mi_repair_parallel");
start_records=info->state->records; start_records=info->state->records;
got_error=1; got_error=1;
@ -2267,6 +2270,8 @@ int mi_repair_by_sort_r(MI_CHECK *param, register MI_INFO *info,
i--; i--;
continue; continue;
} }
if ((!(param->testflag & T_SILENT)))
printf ("- Fixing index %d\n",key+1);
sort_param[i].key_read= ((sort_param[i].keyinfo->flag & HA_FULLTEXT) ? sort_param[i].key_read= ((sort_param[i].keyinfo->flag & HA_FULLTEXT) ?
sort_ft_key_read : sort_key_read); sort_ft_key_read : sort_key_read);
sort_param[i].key_cmp=sort_key_cmp; sort_param[i].key_cmp=sort_key_cmp;
@ -2274,6 +2279,7 @@ int mi_repair_by_sort_r(MI_CHECK *param, register MI_INFO *info,
sort_param[i].lock_in_memory=lock_memory; sort_param[i].lock_in_memory=lock_memory;
sort_param[i].tmpdir=param->tmpdir; sort_param[i].tmpdir=param->tmpdir;
sort_param[i].sort_info=&sort_info; sort_param[i].sort_info=&sort_info;
sort_param[i].master=0;
sort_param[i].fix_datafile=0; sort_param[i].fix_datafile=0;
sort_param[i].filepos=new_header_length; sort_param[i].filepos=new_header_length;
@ -2300,7 +2306,8 @@ int mi_repair_by_sort_r(MI_CHECK *param, register MI_INFO *info,
sort_param[i].key_length+=ft_max_word_len_for_sort-ft_max_word_len; sort_param[i].key_length+=ft_max_word_len_for_sort-ft_max_word_len;
} }
sort_info.total_keys=i; sort_info.total_keys=i;
sort_param[0].fix_datafile= ! rep_quick; sort_param[0].master= 1;
sort_param[0].fix_datafile= (my_bool)(! rep_quick);
sort_info.got_error=0; sort_info.got_error=0;
pthread_mutex_init(&sort_info.mutex, MY_MUTEX_INIT_FAST); pthread_mutex_init(&sort_info.mutex, MY_MUTEX_INIT_FAST);
@ -2321,10 +2328,10 @@ int mi_repair_by_sort_r(MI_CHECK *param, register MI_INFO *info,
In the second one all the threads will fill their sort_buffers In the second one all the threads will fill their sort_buffers
(and call write_keys) at the same time, putting more stress on i/o. (and call write_keys) at the same time, putting more stress on i/o.
*/ */
#if 1 #ifndef USING_SECOND_APPROACH
param->sort_buffer_length/sort_info.total_keys; param->sort_buffer_length/sort_info.total_keys;
#else #else
param->sort_buffer_length*sort_param[i].key_length/total_key_length; param->sort_buffer_length*sort_param[i].key_length/total_key_length;
#endif #endif
if (pthread_create(&sort_param[i].thr, &thr_attr, if (pthread_create(&sort_param[i].thr, &thr_attr,
thr_find_all_keys, thr_find_all_keys,
@ -2488,7 +2495,8 @@ static int sort_key_read(MI_SORT_PARAM *sort_param, void *key)
if (info->state->records == sort_info->max_records) if (info->state->records == sort_info->max_records)
{ {
mi_check_print_error(sort_info->param, mi_check_print_error(sort_info->param,
"Found too many records; Can`t continue"); "Key %d - Found too many records; Can't continue",
sort_param->key+1);
DBUG_RETURN(1); DBUG_RETURN(1);
} }
sort_param->real_key_length= sort_param->real_key_length=
@ -2578,7 +2586,8 @@ static int sort_get_next_record(MI_SORT_PARAM *sort_param)
if (!sort_param->fix_datafile) if (!sort_param->fix_datafile)
{ {
sort_param->filepos=sort_param->pos; sort_param->filepos=sort_param->pos;
share->state.split++; if (sort_param->master)
share->state.split++;
} }
sort_param->max_pos=(sort_param->pos+=share->base.pack_reclength); sort_param->max_pos=(sort_param->pos+=share->base.pack_reclength);
if (*sort_param->record) if (*sort_param->record)
@ -2588,7 +2597,7 @@ static int sort_get_next_record(MI_SORT_PARAM *sort_param)
mi_static_checksum(info,sort_param->record)); mi_static_checksum(info,sort_param->record));
DBUG_RETURN(0); DBUG_RETURN(0);
} }
if (!sort_param->fix_datafile) if (!sort_param->fix_datafile && sort_param->master)
{ {
info->state->del++; info->state->del++;
info->state->empty+=share->base.pack_reclength; info->state->empty+=share->base.pack_reclength;
@ -2734,7 +2743,8 @@ static int sort_get_next_record(MI_SORT_PARAM *sort_param)
} }
if (b_type & (BLOCK_DELETED | BLOCK_SYNC_ERROR)) if (b_type & (BLOCK_DELETED | BLOCK_SYNC_ERROR))
{ {
if (!sort_param->fix_datafile && (b_type & BLOCK_DELETED)) if (!sort_param->fix_datafile && sort_param->master &&
(b_type & BLOCK_DELETED))
{ {
info->state->empty+=block_info.block_len; info->state->empty+=block_info.block_len;
info->state->del++; info->state->del++;
@ -2753,7 +2763,7 @@ static int sort_get_next_record(MI_SORT_PARAM *sort_param)
continue; continue;
} }
if (!sort_param->fix_datafile) if (!sort_param->fix_datafile && sort_param->master)
share->state.split++; share->state.split++;
if (! found_record++) if (! found_record++)
{ {
@ -2895,7 +2905,8 @@ static int sort_get_next_record(MI_SORT_PARAM *sort_param)
if (!sort_param->fix_datafile) if (!sort_param->fix_datafile)
{ {
sort_param->filepos=sort_param->pos; sort_param->filepos=sort_param->pos;
share->state.split++; if (sort_param->master)
share->state.split++;
} }
sort_param->max_pos=(sort_param->pos=block_info.filepos+ sort_param->max_pos=(sort_param->pos=block_info.filepos+
block_info.rec_len); block_info.rec_len);
@ -3003,12 +3014,15 @@ int sort_write_record(MI_SORT_PARAM *sort_param)
break; break;
} }
} }
info->state->records++; if (sort_param->master)
if ((param->testflag & T_WRITE_LOOP) &&
(info->state->records % WRITE_COUNT) == 0)
{ {
char llbuff[22]; info->state->records++;
printf("%s\r", llstr(info->state->records,llbuff)); VOID(fflush(stdout)); if ((param->testflag & T_WRITE_LOOP) &&
(info->state->records % WRITE_COUNT) == 0)
{
char llbuff[22];
printf("%s\r", llstr(info->state->records,llbuff)); VOID(fflush(stdout));
}
} }
DBUG_RETURN(0); DBUG_RETURN(0);
} /* sort_write_record */ } /* sort_write_record */

30
myisam/myisamchk.c
View File

@ -194,6 +194,9 @@ static struct my_option my_long_options[] =
{"force", 'f', {"force", 'f',
"Restart with -r if there are any errors in the table. States will be updated as with --update-state.", "Restart with -r if there are any errors in the table. States will be updated as with --update-state.",
0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0}, 0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0},
{"HELP", 'H',
"Display this help and exit.",
0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0},
{"help", '?', {"help", '?',
"Display this help and exit.", "Display this help and exit.",
0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0}, 0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0},
@ -216,9 +219,15 @@ static struct my_option my_long_options[] =
{"recover", 'r', {"recover", 'r',
"Can fix almost anything except unique keys that aren't unique.", "Can fix almost anything except unique keys that aren't unique.",
0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0}, 0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0},
{"paraller-recover", 'p',
"Same as '-r' but creates all the keys in parallel",
0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0},
{"safe-recover", 'o', {"safe-recover", 'o',
"Uses old recovery method; Slower than '-r' but can handle a couple of cases where '-r' reports that it can't fix the data file.", "Uses old recovery method; Slower than '-r' but can handle a couple of cases where '-r' reports that it can't fix the data file.",
0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0}, 0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0},
{"sort-recover", 'n',
"Force recovering with sorting even if the temporary file was very big.",
0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0},
{"start-check-pos", OPT_START_CHECK_POS, {"start-check-pos", OPT_START_CHECK_POS,
"No help available.", "No help available.",
0, 0, 0, GET_ULL, REQUIRED_ARG, 0, 0, 0, 0, 0, 0}, 0, 0, 0, GET_ULL, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
@ -244,9 +253,6 @@ static struct my_option my_long_options[] =
(gptr*) &check_param.opt_sort_key, (gptr*) &check_param.opt_sort_key,
(gptr*) &check_param.opt_sort_key, (gptr*) &check_param.opt_sort_key,
0, GET_UINT, REQUIRED_ARG, 0, 0, 0, 0, 0, 0}, 0, GET_UINT, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
{"sort-recover", 'n',
"Force recovering with sorting even if the temporary file was very big.",
0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0},
{"tmpdir", 't', {"tmpdir", 't',
"Path for temporary files.", "Path for temporary files.",
(gptr*) &check_param.tmpdir, (gptr*) &check_param.tmpdir,
@ -514,6 +520,11 @@ get_one_option(int optid,
if (argument != disabled_my_option) if (argument != disabled_my_option)
check_param.testflag|= T_REP_BY_SORT; check_param.testflag|= T_REP_BY_SORT;
break; break;
case 'p':
check_param.testflag&= ~T_REP_ANY;
if (argument != disabled_my_option)
check_param.testflag|= T_REP_PARALLEL;
break;
case 'o': case 'o':
check_param.testflag&= ~T_REP_ANY; check_param.testflag&= ~T_REP_ANY;
check_param.force_sort= 0; check_param.force_sort= 0;
@ -616,6 +627,9 @@ get_one_option(int optid,
check_param.start_check_pos= strtoull(argument, NULL, 0); check_param.start_check_pos= strtoull(argument, NULL, 0);
break; break;
#endif #endif
case 'H':
my_print_help(my_long_options);
exit(0);
case '?': case '?':
usage(); usage();
exit(0); exit(0);
@ -864,8 +878,7 @@ static int myisamchk(MI_CHECK *param, my_string filename)
if (tmp != share->state.key_map) if (tmp != share->state.key_map)
info->update|=HA_STATE_CHANGED; info->update|=HA_STATE_CHANGED;
} }
if (rep_quick && chk_del(param, info, if (rep_quick && chk_del(param, info, param->testflag & ~T_VERBOSE))
param->testflag & ~T_VERBOSE))
{ {
if (param->testflag & T_FORCE_CREATE) if (param->testflag & T_FORCE_CREATE)
{ {
@ -881,14 +894,17 @@ static int myisamchk(MI_CHECK *param, my_string filename)
} }
if (!error) if (!error)
{ {
if ((param->testflag & T_REP_BY_SORT) && if ((param->testflag & (T_REP_BY_SORT | T_REP_PARALLEL)) &&
(share->state.key_map || (share->state.key_map ||
(rep_quick && !param->keys_in_use && !recreate)) && (rep_quick && !param->keys_in_use && !recreate)) &&
mi_test_if_sort_rep(info, info->state->records, mi_test_if_sort_rep(info, info->state->records,
info->s->state.key_map, info->s->state.key_map,
param->force_sort)) param->force_sort))
{ {
error=mi_repair_by_sort(param,info,filename,rep_quick); if (param->testflag & T_REP_BY_SORT)
error=mi_repair_by_sort(param,info,filename,rep_quick);
else
error=mi_repair_parallel(param,info,filename,rep_quick);
state_updated=1; state_updated=1;
} }
else if (param->testflag & T_REP_ANY) else if (param->testflag & T_REP_ANY)

41
myisam/sort.c
View File

@ -284,21 +284,25 @@ pthread_handler_decl(thr_find_all_keys,arg)
uint memavl,old_memavl,keys,sort_length; uint memavl,old_memavl,keys,sort_length;
uint idx, maxbuffer; uint idx, maxbuffer;
uchar **sort_keys; uchar **sort_keys;
error=1;
if (my_thread_init())
goto err;
if (info->sort_info->got_error)
goto err;
my_b_clear(&info->tempfile); my_b_clear(&info->tempfile);
my_b_clear(&info->tempfile_for_exceptions); my_b_clear(&info->tempfile_for_exceptions);
bzero((char*) &info->buffpek,sizeof(info->buffpek)); bzero((char*) &info->buffpek,sizeof(info->buffpek));
bzero((char*) &info->unique, sizeof(info->unique)); bzero((char*) &info->unique, sizeof(info->unique));
sort_keys= (uchar **) NULL; sort_keys= (uchar **) NULL;
error= 1;
if (info->sort_info->got_error)
goto err;
memavl=max(info->sortbuff_size, MIN_SORT_MEMORY); memavl=max(info->sortbuff_size, MIN_SORT_MEMORY);
idx= info->sort_info->max_records; idx= info->sort_info->max_records;
sort_length= info->key_length; sort_length= info->key_length;
maxbuffer= 1;
maxbuffer=1;
while (memavl >= MIN_SORT_MEMORY) while (memavl >= MIN_SORT_MEMORY)
{ {
if ((my_off_t) (idx+1)*(sort_length+sizeof(char*)) <= if ((my_off_t) (idx+1)*(sort_length+sizeof(char*)) <=
@ -340,6 +344,7 @@ pthread_handler_decl(thr_find_all_keys,arg)
mi_check_print_error(info->sort_info->param,"Sort buffer to small"); /* purecov: tested */ mi_check_print_error(info->sort_info->param,"Sort buffer to small"); /* purecov: tested */
goto err; /* purecov: tested */ goto err; /* purecov: tested */
} }
// (*info->lock_in_memory)(info->sort_info->param);/* Everything is allocated */
if (info->sort_info->param->testflag & T_VERBOSE) if (info->sort_info->param->testflag & T_VERBOSE)
printf("Key %d - Allocating buffer for %d keys\n",info->key+1,keys); printf("Key %d - Allocating buffer for %d keys\n",info->key+1,keys);
@ -348,8 +353,8 @@ pthread_handler_decl(thr_find_all_keys,arg)
idx=error=0; idx=error=0;
sort_keys[0]=(uchar*) (sort_keys+keys); sort_keys[0]=(uchar*) (sort_keys+keys);
while (!(error=info->sort_info->got_error) || while (!(error=info->sort_info->got_error) &&
!(error=(*info->key_read)(info,sort_keys[idx]))) !(error=(*info->key_read)(info,sort_keys[idx])))
{ {
if (info->real_key_length > info->key_length) if (info->real_key_length > info->key_length)
{ {
@ -364,7 +369,6 @@ pthread_handler_decl(thr_find_all_keys,arg)
(BUFFPEK *)alloc_dynamic(&info->buffpek), (BUFFPEK *)alloc_dynamic(&info->buffpek),
&info->tempfile)) &info->tempfile))
goto err; goto err;
sort_keys[0]=(uchar*) (sort_keys+keys); sort_keys[0]=(uchar*) (sort_keys+keys);
memcpy(sort_keys[0],sort_keys[idx-1],(size_t) info->key_length); memcpy(sort_keys[0],sort_keys[idx-1],(size_t) info->key_length);
idx=1; idx=1;
@ -401,6 +405,7 @@ ok:
info->sort_info->threads_running--; info->sort_info->threads_running--;
pthread_cond_signal(&info->sort_info->cond); pthread_cond_signal(&info->sort_info->cond);
pthread_mutex_unlock(&info->sort_info->mutex); pthread_mutex_unlock(&info->sort_info->mutex);
my_thread_end();
return NULL; return NULL;
} }
@ -414,14 +419,14 @@ int thr_write_keys(MI_SORT_PARAM *sort_param)
int got_error=sort_info->got_error; int got_error=sort_info->got_error;
uint i; uint i;
MI_INFO *info=sort_info->info; MI_INFO *info=sort_info->info;
MYISAM_SHARE *share=info->s; MYISAM_SHARE *share=info->s;
MI_SORT_PARAM *sinfo; MI_SORT_PARAM *sinfo;
byte *mergebuf=0; byte *mergebuf=0;
LINT_INIT(length); LINT_INIT(length);
for (i=0, sinfo=sort_param ; for (i=0, sinfo=sort_param ; i<sort_info->total_keys ; i++,
i < sort_info->total_keys ; rec_per_key_part+=sinfo->keyinfo->keysegs,
i++, sinfo++, rec_per_key_part+=sinfo->keyinfo->keysegs) sinfo++)
{ {
if (!sinfo->sort_keys) if (!sinfo->sort_keys)
{ {
@ -447,11 +452,11 @@ int thr_write_keys(MI_SORT_PARAM *sort_param)
sinfo->sort_keys=0; sinfo->sort_keys=0;
} }
for (i=0, sinfo=sort_param ; for (i=0, sinfo=sort_param ; i<sort_info->total_keys ; i++,
i < sort_info->total_keys ; delete_dynamic(&sinfo->buffpek),
i++, sinfo++, delete_dynamic(&sinfo->buffpek), close_cached_file(&sinfo->tempfile),
close_cached_file(&sinfo->tempfile), close_cached_file(&sinfo->tempfile_for_exceptions),
close_cached_file(&sinfo->tempfile_for_exceptions)) sinfo++)
{ {
if (got_error) if (got_error)
continue; continue;
@ -552,8 +557,10 @@ static int NEAR_F write_keys(MI_SORT_PARAM *info, register uchar **sort_keys,
buffpek->count=count; buffpek->count=count;
for (end=sort_keys+count ; sort_keys != end ; sort_keys++) for (end=sort_keys+count ; sort_keys != end ; sort_keys++)
{
if (my_b_write(tempfile,(byte*) *sort_keys,(uint) sort_length)) if (my_b_write(tempfile,(byte*) *sort_keys,(uint) sort_length))
DBUG_RETURN(1); /* purecov: inspected */ DBUG_RETURN(1); /* purecov: inspected */
}
DBUG_RETURN(0); DBUG_RETURN(0);
} /* write_keys */ } /* write_keys */
@ -576,7 +583,7 @@ static int NEAR_F write_key(MI_SORT_PARAM *info, uchar *key,
} /* write_key */ } /* write_key */
/* Write index */ /* Write index */
static int NEAR_F write_index(MI_SORT_PARAM *info, register uchar **sort_keys, static int NEAR_F write_index(MI_SORT_PARAM *info, register uchar **sort_keys,
register uint count) register uint count)

99
mysys/mf_iocache.c
View File

@ -68,6 +68,9 @@ static void my_aiowait(my_aio_result *result);
#define unlock_append_buffer(info) #define unlock_append_buffer(info)
#endif #endif
#define IO_ROUND_UP(X) (((X)+IO_SIZE-1) & ~(IO_SIZE-1))
#define IO_ROUND_DN(X) ( (X) & ~(IO_SIZE-1))
static void static void
init_functions(IO_CACHE* info, enum cache_type type) init_functions(IO_CACHE* info, enum cache_type type)
{ {
@ -424,22 +427,24 @@ int _my_b_read(register IO_CACHE *info, byte *Buffer, uint Count)
DBUG_RETURN(0); DBUG_RETURN(0);
} }
#ifdef THREAD #ifdef THREAD
/* Prepare IO_CACHE for shared use */
/* Initialzie multi-thread usage of the IO cache */
void init_io_cache_share(IO_CACHE *info, IO_CACHE_SHARE *s, uint num_threads) void init_io_cache_share(IO_CACHE *info, IO_CACHE_SHARE *s, uint num_threads)
{ {
DBUG_ASSERT(info->type == READ_CACHE); DBUG_ASSERT(info->type == READ_CACHE);
pthread_mutex_init(&s->mutex, MY_MUTEX_INIT_FAST); pthread_mutex_init(&s->mutex, MY_MUTEX_INIT_FAST);
pthread_cond_init(&s->cond, 0); pthread_cond_init (&s->cond, 0);
s->count=num_threads; s->count=num_threads-1;
s->active=0; /* to catch errors */ s->active=0; /* to catch errors */
info->share=s; info->share=s;
info->read_function=_my_b_read_r; info->read_function=_my_b_read_r;
} }
/*
Remove a thread from shared access to IO_CACHE
Every thread should do that on exit for not
to deadlock other threads
*/
void remove_io_thread(IO_CACHE *info) void remove_io_thread(IO_CACHE *info)
{ {
pthread_mutex_lock(&info->share->mutex); pthread_mutex_lock(&info->share->mutex);
@ -448,34 +453,41 @@ void remove_io_thread(IO_CACHE *info)
pthread_mutex_unlock(&info->share->mutex); pthread_mutex_unlock(&info->share->mutex);
} }
static int lock_io_cache(IO_CACHE *info)
int lock_io_cache(IO_CACHE *info)
{ {
pthread_mutex_lock(&info->share->mutex); pthread_mutex_lock(&info->share->mutex);
if (!info->share->count) if (!info->share->count)
return 1; return 1;
info->share->count--;
pthread_cond_wait(&((info)->share->cond), &((info)->share->mutex)); --(info->share->count);
if (!++info->share->count) pthread_cond_wait(&info->share->cond, &info->share->mutex);
/*
count can be -1 here, if one thread was removed (remove_io_thread)
while all others were locked (lock_io_cache).
If this is the case, this thread behaves as if count was 0 from the
very beginning, that is returns 1 and does not unlock the mutex.
*/
if (++(info->share->count))
return pthread_mutex_unlock(&info->share->mutex);
else
return 1; return 1;
pthread_mutex_unlock(&info->share->mutex);
return 0;
} }
void unlock_io_cache(IO_CACHE *info) static void unlock_io_cache(IO_CACHE *info)
{ {
pthread_cond_broadcast(&info->share->cond); pthread_cond_broadcast(&info->share->cond);
pthread_mutex_unlock(&info->share->mutex); pthread_mutex_unlock(&info->share->mutex);
} }
/* /*
Read from the io cache in a thread safe manner Read from IO_CACHE when it is shared between several threads.
It works as follows: when a thread tries to read from a file
(that is, after using all the data from the (shared) buffer),
it just hangs on lock_io_cache(), wating for other threads.
When the very last thread attempts a read, lock_io_cache()
returns 1, the thread does actual IO and unlock_io_cache(),
which signals all the waiting threads that data is in the buffer.
*/ */
#define IO_ROUND_UP(X) (((X)+IO_SIZE-1) & ~(IO_SIZE-1))
#define IO_ROUND_DN(X) ( (X) & ~(IO_SIZE-1))
int _my_b_read_r(register IO_CACHE *info, byte *Buffer, uint Count) int _my_b_read_r(register IO_CACHE *info, byte *Buffer, uint Count)
{ {
my_off_t pos_in_file; my_off_t pos_in_file;
@ -491,24 +503,40 @@ int _my_b_read_r(register IO_CACHE *info, byte *Buffer, uint Count)
} }
while (Count) while (Count)
{ {
uint cnt, len; int cnt, len;
pos_in_file= info->pos_in_file + (uint)(info->read_end - info->buffer); pos_in_file= info->pos_in_file + (uint)(info->read_end - info->buffer);
diff_length= (uint) (pos_in_file & (IO_SIZE-1)); diff_length= (uint) (pos_in_file & (IO_SIZE-1));
length=IO_ROUND_UP(Count+diff_length)-diff_length; length=IO_ROUND_UP(Count+diff_length)-diff_length;
length= ((length <= info->read_length) ? length=IO_ROUND_UP(Count+diff_length)-diff_length;
length + IO_ROUND_DN(info->read_length - length) : length=(length <= info->read_length) ?
length - IO_ROUND_UP(length - info->read_length)) ; length + IO_ROUND_DN(info->read_length - length) :
length - IO_ROUND_UP(length - info->read_length) ;
if (info->type != READ_FIFO && (length > info->end_of_file - pos_in_file))
length=info->end_of_file - pos_in_file;
if (length == 0)
{
info->error=(int) read_len;
DBUG_RETURN(1);
}
if (lock_io_cache(info)) if (lock_io_cache(info))
{ {
#if 0 && SAFE_MUTEX
#define PRINT_LOCK(M) printf("Thread %d: mutex is %s\n", my_thread_id(), \
(((safe_mutex_t *)(M))->count ? "Locked" : "Unlocked"))
#else
#define PRINT_LOCK(M)
#endif
PRINT_LOCK(&info->share->mutex);
info->share->active=info; info->share->active=info;
if (info->seek_not_done) /* File touched, do seek */ if (info->seek_not_done) /* File touched, do seek */
VOID(my_seek(info->file,pos_in_file,MY_SEEK_SET,MYF(0))); VOID(my_seek(info->file,pos_in_file,MY_SEEK_SET,MYF(0)));
len=my_read(info->file,info->buffer, length, info->myflags); len=(int)my_read(info->file,info->buffer, length, info->myflags);
info->read_end=info->buffer + (len == (uint) -1 ? 0 : len); info->read_end=info->buffer + (len == -1 ? 0 : len);
info->error=(len == length ? 0 : len); info->error=(len == (int)length ? 0 : len);
info->pos_in_file=pos_in_file; info->pos_in_file=pos_in_file;
unlock_io_cache(info); unlock_io_cache(info);
PRINT_LOCK(&info->share->mutex);
} }
else else
{ {
@ -516,15 +544,16 @@ int _my_b_read_r(register IO_CACHE *info, byte *Buffer, uint Count)
info->read_end= info->share->active->read_end; info->read_end= info->share->active->read_end;
info->pos_in_file= info->share->active->pos_in_file; info->pos_in_file= info->share->active->pos_in_file;
len= (info->error == -1 ? -1 : info->read_end-info->buffer); len= (info->error == -1 ? -1 : info->read_end-info->buffer);
PRINT_LOCK(&info->share->mutex);
} }
info->read_pos=info->buffer; info->read_pos=info->buffer;
info->seek_not_done=0; info->seek_not_done=0;
if (info->error) if (len <= 0)
{ {
info->error=(int) read_len; info->error=(int) read_len;
DBUG_RETURN(1); DBUG_RETURN(1);
} }
cnt=(len > Count) ? Count : len; cnt=(len > Count) ? (int) Count : len;
memcpy(Buffer,info->read_pos, (size_t)cnt); memcpy(Buffer,info->read_pos, (size_t)cnt);
Count -=cnt; Count -=cnt;
Buffer+=cnt; Buffer+=cnt;
@ -1098,11 +1127,19 @@ int end_io_cache(IO_CACHE *info)
DBUG_ENTER("end_io_cache"); DBUG_ENTER("end_io_cache");
#ifdef THREAD #ifdef THREAD
/* simple protection against multi-close: destroying share first */
if (info->share) if (info->share)
{ {
pthread_cond_destroy(&info->share->cond); #ifdef SAFE_MUTEX
/* simple protection against multi-close: destroying share first */
if (pthread_cond_destroy (&info->share->cond) |
pthread_mutex_destroy(&info->share->mutex))
{
DBUG_RETURN(1);
}
#else
pthread_cond_destroy (&info->share->cond);
pthread_mutex_destroy(&info->share->mutex); pthread_mutex_destroy(&info->share->mutex);
#endif
info->share=0; info->share=0;
} }
#endif #endif