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Add support for user-specified chunk allocators/deallocators.

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Add new mallctl endpoints "arena<i>.chunk.alloc" and
"arena<i>.chunk.dealloc" to allow userspace to configure
jemalloc's chunk allocator and deallocator on a per-arena
basis.
This commit is contained in:
aravind
2014-05-05 15:16:56 -07:00
committed by Jason Evans
parent 4bbd11b789
commit fb7fe50a88
16 changed files with 283 additions and 45 deletions
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61
src/ctl.c
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@@ -113,6 +113,8 @@ CTL_PROTO(opt_prof_accum)
CTL_PROTO(arena_i_purge)
static void arena_purge(unsigned arena_ind);
CTL_PROTO(arena_i_dss)
CTL_PROTO(arena_i_chunk_alloc)
CTL_PROTO(arena_i_chunk_dealloc)
INDEX_PROTO(arena_i)
CTL_PROTO(arenas_bin_i_size)
CTL_PROTO(arenas_bin_i_nregs)
@@ -251,9 +253,15 @@ static const ctl_named_node_t opt_node[] = {
{NAME("prof_accum"), CTL(opt_prof_accum)}
};
static const ctl_named_node_t chunk_node[] = {
{NAME("alloc"), CTL(arena_i_chunk_alloc)},
{NAME("dealloc"), CTL(arena_i_chunk_dealloc)}
};
static const ctl_named_node_t arena_i_node[] = {
{NAME("purge"), CTL(arena_i_purge)},
{NAME("dss"), CTL(arena_i_dss)}
{NAME("dss"), CTL(arena_i_dss)},
{NAME("chunk"), CHILD(named, chunk)},
};
static const ctl_named_node_t super_arena_i_node[] = {
{NAME(""), CHILD(named, arena_i)}
@@ -1368,6 +1376,57 @@ label_return:
return (ret);
}
static int
arena_i_chunk_alloc_ctl(const size_t *mib, size_t miblen, void *oldp, size_t *oldlenp,
void *newp, size_t newlen)
{
int ret;
unsigned arena_ind = mib[1];
arena_t *arena;
malloc_mutex_lock(&ctl_mtx);
if (arena_ind < narenas_total && (arena = arenas[arena_ind]) != NULL) {
malloc_mutex_lock(&arena->lock);
READ(arena->chunk_alloc, chunk_alloc_t *);
WRITE(arena->chunk_alloc, chunk_alloc_t *);
} else {
ret = EFAULT;
goto label_outer_return;
}
ret = 0;
label_return:
malloc_mutex_unlock(&arena->lock);
label_outer_return:
malloc_mutex_unlock(&ctl_mtx);
return (ret);
}
static int
arena_i_chunk_dealloc_ctl(const size_t *mib, size_t miblen, void *oldp, size_t *oldlenp,
void *newp, size_t newlen)
{
int ret;
unsigned arena_ind = mib[1];
arena_t *arena;
malloc_mutex_lock(&ctl_mtx);
if (arena_ind < narenas_total && (arena = arenas[arena_ind]) != NULL) {
malloc_mutex_lock(&arena->lock);
READ(arena->chunk_dealloc, chunk_dealloc_t *);
WRITE(arena->chunk_dealloc, chunk_dealloc_t *);
} else {
ret = EFAULT;
goto label_outer_return;
}
ret = 0;
label_return:
malloc_mutex_unlock(&arena->lock);
label_outer_return:
malloc_mutex_unlock(&ctl_mtx);
return (ret);
}
static const ctl_named_node_t *
arena_i_index(const size_t *mib, size_t miblen, size_t i)
{