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Implement ticker.

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Implement ticker, which provides a simple API for ticking off some
number of events before indicating that the ticker has hit its limit.
This commit is contained in:
Jason Evans 2016-02-02 20:27:54 -08:00 committed by Jason Evans
parent 94451d184b
commit 9998000b2b
6 changed files with 163 additions and 2 deletions
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5
Makefile.in
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@ -85,8 +85,8 @@ C_SRCS := $(srcroot)src/jemalloc.c $(srcroot)src/arena.c \
$(srcroot)src/extent.c $(srcroot)src/hash.c $(srcroot)src/huge.c \
$(srcroot)src/mb.c $(srcroot)src/mutex.c $(srcroot)src/pages.c \
$(srcroot)src/prof.c $(srcroot)src/quarantine.c $(srcroot)src/rtree.c \
$(srcroot)src/stats.c $(srcroot)src/tcache.c $(srcroot)src/time.c \
$(srcroot)src/tsd.c $(srcroot)src/util.c
$(srcroot)src/stats.c $(srcroot)src/tcache.c $(srcroot)src/ticker.c \
$(srcroot)src/time.c $(srcroot)src/tsd.c $(srcroot)src/util.c
ifeq ($(enable_valgrind), 1)
C_SRCS += $(srcroot)src/valgrind.c
endif
@ -143,6 +143,7 @@ TESTS_UNIT := $(srcroot)test/unit/atomic.c \
$(srcroot)test/unit/SFMT.c \
$(srcroot)test/unit/size_classes.c \
$(srcroot)test/unit/stats.c \
$(srcroot)test/unit/ticker.c \
$(srcroot)test/unit/time.c \
$(srcroot)test/unit/tsd.c \
$(srcroot)test/unit/util.c \

4
include/jemalloc/internal/jemalloc_internal.h.in
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@ -361,6 +361,7 @@ typedef unsigned szind_t;
#include "jemalloc/internal/util.h"
#include "jemalloc/internal/atomic.h"
#include "jemalloc/internal/prng.h"
#include "jemalloc/internal/ticker.h"
#include "jemalloc/internal/ckh.h"
#include "jemalloc/internal/size_classes.h"
#include "jemalloc/internal/stats.h"
@ -390,6 +391,7 @@ typedef unsigned szind_t;
#include "jemalloc/internal/util.h"
#include "jemalloc/internal/atomic.h"
#include "jemalloc/internal/prng.h"
#include "jemalloc/internal/ticker.h"
#include "jemalloc/internal/ckh.h"
#include "jemalloc/internal/size_classes.h"
#include "jemalloc/internal/stats.h"
@ -476,6 +478,7 @@ void jemalloc_postfork_child(void);
#include "jemalloc/internal/util.h"
#include "jemalloc/internal/atomic.h"
#include "jemalloc/internal/prng.h"
#include "jemalloc/internal/ticker.h"
#include "jemalloc/internal/ckh.h"
#include "jemalloc/internal/size_classes.h"
#include "jemalloc/internal/stats.h"
@ -505,6 +508,7 @@ void jemalloc_postfork_child(void);
#include "jemalloc/internal/util.h"
#include "jemalloc/internal/atomic.h"
#include "jemalloc/internal/prng.h"
#include "jemalloc/internal/ticker.h"
#include "jemalloc/internal/ckh.h"
#include "jemalloc/internal/size_classes.h"
#include "jemalloc/internal/stats.h"

3
include/jemalloc/internal/private_symbols.txt
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@ -460,8 +460,11 @@ tcaches_get
tcache_stats_merge
thread_allocated_cleanup
thread_deallocated_cleanup
ticker_copy
ticker_init
ticker_read
ticker_tick
ticker_ticks
time_add
time_compare
time_copy

75
include/jemalloc/internal/ticker.h Normal file
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@ -0,0 +1,75 @@
/******************************************************************************/
#ifdef JEMALLOC_H_TYPES
typedef struct ticker_s ticker_t;
#endif /* JEMALLOC_H_TYPES */
/******************************************************************************/
#ifdef JEMALLOC_H_STRUCTS
struct ticker_s {
int32_t tick;
int32_t nticks;
};
#endif /* JEMALLOC_H_STRUCTS */
/******************************************************************************/
#ifdef JEMALLOC_H_EXTERNS
#endif /* JEMALLOC_H_EXTERNS */
/******************************************************************************/
#ifdef JEMALLOC_H_INLINES
#ifndef JEMALLOC_ENABLE_INLINE
void ticker_init(ticker_t *ticker, int32_t nticks);
void ticker_copy(ticker_t *ticker, const ticker_t *other);
int32_t ticker_read(const ticker_t *ticker);
bool ticker_ticks(ticker_t *ticker, int32_t nticks);
bool ticker_tick(ticker_t *ticker);
#endif
#if (defined(JEMALLOC_ENABLE_INLINE) || defined(JEMALLOC_TICKER_C_))
JEMALLOC_INLINE void
ticker_init(ticker_t *ticker, int32_t nticks)
{
ticker->tick = nticks;
ticker->nticks = nticks;
}
JEMALLOC_INLINE void
ticker_copy(ticker_t *ticker, const ticker_t *other)
{
*ticker = *other;
}
JEMALLOC_INLINE int32_t
ticker_read(const ticker_t *ticker)
{
return (ticker->tick);
}
JEMALLOC_INLINE bool
ticker_ticks(ticker_t *ticker, int32_t nticks)
{
if (unlikely(ticker->tick < nticks)) {
ticker->tick = ticker->nticks;
return (true);
}
ticker->tick -= nticks;
return(false);
}
JEMALLOC_INLINE bool
ticker_tick(ticker_t *ticker)
{
return (ticker_ticks(ticker, 1));
}
#endif
#endif /* JEMALLOC_H_INLINES */
/******************************************************************************/

2
src/ticker.c Normal file
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@ -0,0 +1,2 @@
#define JEMALLOC_TICKER_C_
#include "jemalloc/internal/jemalloc_internal.h"

76
test/unit/ticker.c Normal file
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@ -0,0 +1,76 @@
#include "test/jemalloc_test.h"
TEST_BEGIN(test_ticker_tick)
{
#define NREPS 2
#define NTICKS 3
ticker_t ticker;
int32_t i, j;
ticker_init(&ticker, NTICKS);
for (i = 0; i < NREPS; i++) {
for (j = 0; j < NTICKS; j++) {
assert_u_eq(ticker_read(&ticker), NTICKS - j,
"Unexpected ticker value (i=%d, j=%d)", i, j);
assert_false(ticker_tick(&ticker),
"Unexpected ticker fire (i=%d, j=%d)", i, j);
}
assert_u32_eq(ticker_read(&ticker), 0,
"Expected ticker depletion");
assert_true(ticker_tick(&ticker),
"Expected ticker fire (i=%d)", i);
assert_u32_eq(ticker_read(&ticker), NTICKS,
"Expected ticker reset");
}
#undef NTICKS
}
TEST_END
TEST_BEGIN(test_ticker_ticks)
{
#define NTICKS 3
ticker_t ticker;
ticker_init(&ticker, NTICKS);
assert_u_eq(ticker_read(&ticker), NTICKS, "Unexpected ticker value");
assert_false(ticker_ticks(&ticker, NTICKS), "Unexpected ticker fire");
assert_u_eq(ticker_read(&ticker), 0, "Unexpected ticker value");
assert_true(ticker_ticks(&ticker, NTICKS), "Expected ticker fire");
assert_u_eq(ticker_read(&ticker), NTICKS, "Unexpected ticker value");
assert_true(ticker_ticks(&ticker, NTICKS + 1), "Expected ticker fire");
assert_u_eq(ticker_read(&ticker), NTICKS, "Unexpected ticker value");
#undef NTICKS
}
TEST_END
TEST_BEGIN(test_ticker_copy)
{
#define NTICKS 3
ticker_t ta, tb;
ticker_init(&ta, NTICKS);
ticker_copy(&tb, &ta);
assert_u_eq(ticker_read(&tb), NTICKS, "Unexpected ticker value");
assert_true(ticker_ticks(&tb, NTICKS + 1), "Expected ticker fire");
assert_u_eq(ticker_read(&tb), NTICKS, "Unexpected ticker value");
ticker_tick(&ta);
ticker_copy(&tb, &ta);
assert_u_eq(ticker_read(&tb), NTICKS - 1, "Unexpected ticker value");
assert_true(ticker_ticks(&tb, NTICKS), "Expected ticker fire");
assert_u_eq(ticker_read(&tb), NTICKS, "Unexpected ticker value");
#undef NTICKS
}
TEST_END
int
main(void)
{
return (test(
test_ticker_tick,
test_ticker_ticks,
test_ticker_copy));
}