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nexedi
MariaDB
Commits
d2c6783c
Commit
d2c6783c
authored
Aug 25, 2008
by
Rich Prohaska
Browse files
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Plain Diff
test lock overhead. addresses #1075
git-svn-id:
file:///svn/tokudb@5830
c7de825b-a66e-492c-adef-691d508d4ae1
parent
5a9b210d
Changes
1
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Showing
1 changed file
with
53 additions
and
3 deletions
+53
-3
newbrt/cachetable.c
newbrt/cachetable.c
+53
-3
No files found.
newbrt/cachetable.c
View file @
d2c6783c
...
...
@@ -14,6 +14,9 @@
#include <string.h>
#include <sys/stat.h>
#include <unistd.h>
#include <pthread.h>
#define DO_CACHETABLE_LOCK 0
//#define TRACE_CACHETABLE
#ifdef TRACE_CACHETABLE
...
...
@@ -53,8 +56,27 @@ struct cachetable {
long
size_current
,
size_limit
;
LSN
lsn_of_checkpoint
;
// the most recent checkpoint in the log.
TOKULOGGER
logger
;
#if DO_CACHETABLE_LOCK
pthread_mutex_t
mutex
;
#endif
};
// lock the cachetable mutex
static
inline
void
cachetable_lock
(
CACHETABLE
ct
__attribute__
((
unused
)))
{
#if DO_CACHETABLE_LOCK
int
r
=
pthread_mutex_lock
(
&
ct
->
mutex
);
assert
(
r
==
0
);
#endif
}
// unlock the cachetable mutex
static
inline
void
cachetable_unlock
(
CACHETABLE
ct
__attribute__
((
unused
)))
{
#if DO_CACHETABLE_LOCK
int
r
=
pthread_mutex_unlock
(
&
ct
->
mutex
);
assert
(
r
==
0
);
#endif
}
struct
fileid
{
dev_t
st_dev
;
/* device and inode are enough to uniquely identify a file in unix. */
ino_t
st_ino
;
...
...
@@ -99,6 +121,9 @@ int toku_create_cachetable(CACHETABLE *result, long size_limit, LSN initial_lsn,
t
->
size_limit
=
size_limit
;
t
->
lsn_of_checkpoint
=
initial_lsn
;
t
->
logger
=
logger
;
#if DO_CACHTABLE_LOCK
int
r
=
pthread_mutex_init
(
&
t
->
mutex
,
0
);
assert
(
r
==
0
);
#endif
*
result
=
t
;
return
0
;
}
...
...
@@ -515,6 +540,8 @@ int toku_cachetable_put(CACHEFILE cachefile, CACHEKEY key, u_int32_t fullhash, v
cachetable_flush_func_t
flush_callback
,
cachetable_fetch_func_t
fetch_callback
,
void
*
extraargs
)
{
WHEN_TRACE_CT
(
printf
(
"%s:%d CT cachetable_put(%lld)=%p
\n
"
,
__FILE__
,
__LINE__
,
key
,
value
));
int
count
=
0
;
CACHETABLE
ct
=
cachefile
->
cachetable
;
cachetable_lock
(
ct
);
{
PAIR
p
;
for
(
p
=
cachefile
->
cachetable
->
table
[
fullhash
&
(
cachefile
->
cachetable
->
table_size
-
1
)];
p
;
p
=
p
->
hash_chain
)
{
...
...
@@ -527,21 +554,27 @@ int toku_cachetable_put(CACHEFILE cachefile, CACHEKEY key, u_int32_t fullhash, v
assert
(
p
->
flush_callback
==
flush_callback
);
assert
(
p
->
fetch_callback
==
fetch_callback
);
p
->
pinned
++
;
/* Already present. But increment the pin count. */
cachetable_unlock
(
ct
);
return
-
1
;
/* Already present. */
}
}
}
int
r
;
note_hash_count
(
count
);
if
((
r
=
maybe_flush_some
(
cachefile
->
cachetable
,
size
)))
return
r
;
if
((
r
=
maybe_flush_some
(
cachefile
->
cachetable
,
size
)))
{
cachetable_unlock
(
ct
);
return
r
;
}
// flushing could change the table size, but wont' change the fullhash
r
=
cachetable_insert_at
(
cachefile
,
fullhash
,
key
,
value
,
size
,
flush_callback
,
fetch_callback
,
extraargs
,
1
,
ZERO_LSN
);
cachetable_unlock
(
ct
);
return
r
;
}
int
toku_cachetable_get_and_pin
(
CACHEFILE
cachefile
,
CACHEKEY
key
,
u_int32_t
fullhash
,
void
**
value
,
long
*
sizep
,
cachetable_flush_func_t
flush_callback
,
cachetable_fetch_func_t
fetch_callback
,
void
*
extraargs
)
{
CACHETABLE
t
=
cachefile
->
cachetable
;
cachetable_lock
(
t
);
int
tsize
__attribute__
((
__unused__
))
=
t
->
table_size
;
PAIR
p
;
int
count
=
0
;
...
...
@@ -553,6 +586,7 @@ int toku_cachetable_get_and_pin(CACHEFILE cachefile, CACHEKEY key, u_int32_t ful
if
(
sizep
)
*
sizep
=
p
->
size
;
p
->
pinned
++
;
lru_touch
(
t
,
p
);
cachetable_unlock
(
t
);
WHEN_TRACE_CT
(
printf
(
"%s:%d cachtable_get_and_pin(%lld)--> %p
\n
"
,
__FILE__
,
__LINE__
,
key
,
*
value
));
return
0
;
}
...
...
@@ -566,6 +600,7 @@ int toku_cachetable_get_and_pin(CACHEFILE cachefile, CACHEKEY key, u_int32_t ful
LSN
written_lsn
;
WHEN_TRACE_CT
(
printf
(
"%s:%d CT: fetch_callback(%lld...)
\n
"
,
__FILE__
,
__LINE__
,
key
));
if
((
r
=
fetch_callback
(
cachefile
,
key
,
fullhash
,
&
toku_value
,
&
size
,
extraargs
,
&
written_lsn
)))
{
cachetable_unlock
(
t
);
return
r
;
}
cachetable_insert_at
(
cachefile
,
fullhash
,
key
,
toku_value
,
size
,
flush_callback
,
fetch_callback
,
extraargs
,
0
,
written_lsn
);
...
...
@@ -574,7 +609,11 @@ int toku_cachetable_get_and_pin(CACHEFILE cachefile, CACHEKEY key, u_int32_t ful
*
sizep
=
size
;
// maybe_flush_some(t, size);
}
if
((
r
=
maybe_flush_some
(
t
,
0
)))
return
r
;
if
((
r
=
maybe_flush_some
(
t
,
0
)))
{
cachetable_unlock
(
t
);
return
r
;
}
cachetable_unlock
(
t
);
WHEN_TRACE_CT
(
printf
(
"%s:%d did fetch: cachtable_get_and_pin(%lld)--> %p
\n
"
,
__FILE__
,
__LINE__
,
key
,
*
value
));
return
0
;
}
...
...
@@ -583,6 +622,7 @@ int toku_cachetable_maybe_get_and_pin (CACHEFILE cachefile, CACHEKEY key, u_int3
CACHETABLE
t
=
cachefile
->
cachetable
;
PAIR
p
;
int
count
=
0
;
cachetable_lock
(
t
);
for
(
p
=
t
->
table
[
fullhash
&
(
t
->
table_size
-
1
)];
p
;
p
=
p
->
hash_chain
)
{
count
++
;
if
(
p
->
key
==
key
&&
p
->
cachefile
==
cachefile
)
{
...
...
@@ -590,10 +630,12 @@ int toku_cachetable_maybe_get_and_pin (CACHEFILE cachefile, CACHEKEY key, u_int3
*
value
=
p
->
value
;
p
->
pinned
++
;
lru_touch
(
t
,
p
);
cachetable_unlock
(
t
);
//printf("%s:%d cachetable_maybe_get_and_pin(%lld)--> %p\n", __FILE__, __LINE__, key, *value);
return
0
;
}
}
cachetable_unlock
(
t
);
note_hash_count
(
count
);
return
-
1
;
}
...
...
@@ -606,6 +648,7 @@ int toku_cachetable_unpin(CACHEFILE cachefile, CACHEKEY key, u_int32_t fullhash,
//printf("%s:%d is dirty now=%d\n", __FILE__, __LINE__, dirty);
int
count
=
0
;
//assert(fullhash == toku_cachetable_hash(cachefile, key));
cachetable_lock
(
t
);
for
(
p
=
t
->
table
[
fullhash
&
(
t
->
table_size
-
1
)];
p
;
p
=
p
->
hash_chain
)
{
count
++
;
if
(
p
->
key
==
key
&&
p
->
cachefile
==
cachefile
)
{
...
...
@@ -621,11 +664,15 @@ int toku_cachetable_unpin(CACHEFILE cachefile, CACHEKEY key, u_int32_t fullhash,
WHEN_TRACE_CT
(
printf
(
"[count=%lld]
\n
"
,
p
->
pinned
));
{
int
r
;
if
((
r
=
maybe_flush_some
(
t
,
0
)))
return
r
;
if
((
r
=
maybe_flush_some
(
t
,
0
)))
{
cachetable_unlock
(
t
);
return
r
;
}
}
cachetable_unlock
(
t
);
return
0
;
}
}
cachetable_unlock
(
t
);
note_hash_count
(
count
);
return
-
1
;
}
...
...
@@ -768,6 +815,9 @@ int toku_cachetable_close (CACHETABLE *tp) {
for
(
i
=
0
;
i
<
t
->
table_size
;
i
++
)
{
if
(
t
->
table
[
i
])
return
-
1
;
}
#if DO_CACHETABLE_LOCK
r
=
pthread_mutex_destroy
(
&
t
->
mutex
);
assert
(
r
==
0
);
#endif
toku_free
(
t
->
table
);
toku_free
(
t
);
*
tp
=
0
;
...
...
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