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Add MALLCTL_ARENAS_ALL.

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Add the MALLCTL_ARENAS_ALL cpp macro as a fixed index for use
in accessing the arena.<i>.{purge,decay,dss} and stats.arenas.<i>.*
mallctls, and deprecate access via the arenas.narenas index (to be
removed in 6.0.0).
This commit is contained in:
Jason Evans 2017-01-03 07:27:42 -08:00
parent 027ace8519
commit 3dc4e83ccb
6 changed files with 171 additions and 92 deletions
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37
doc/jemalloc.xml.in
View File

@ -694,12 +694,22 @@ for (i = 0; i < nbins; i++) {
any. A name element encoded as <literal>&lt;i&gt;</literal> or
<literal>&lt;j&gt;</literal> indicates an integer component, where the
integer varies from 0 to some upper value that must be determined via
introspection. In the case of <mallctl>stats.arenas.&lt;i&gt;.*</mallctl>,
<literal>&lt;i&gt;</literal> equal to <link
linkend="arenas.narenas"><mallctl>arenas.narenas</mallctl></link> can be
used to access the summation of statistics from all arenas. Take special
note of the <link linkend="epoch"><mallctl>epoch</mallctl></link> mallctl,
which controls refreshing of cached dynamic statistics.</para>
introspection. In the case of <mallctl>stats.arenas.&lt;i&gt;.*</mallctl>
and <mallctl>arena.&lt;i&gt;.{purge,decay,dss}</mallctl>,
<literal>&lt;i&gt;</literal> equal to
<constant>MALLCTL_ARENAS_ALL</constant> can be used to operate on all arenas
or access the summation of statistics from all arenas. This constant can be
utilized either via <function>mallctlnametomib()</function> followed by
<function>mallctlbymib()</function>, or via code such as the following:
<programlisting language="C"><![CDATA[
#define STRINGIFY_HELPER(x) #x
#define STRINGIFY(x) STRINGIFY_HELPER(x)
mallctl("arena." STRINGIFY(MALLCTL_ARENAS_ALL) ".decay",
NULL, NULL, NULL, 0);]]></programlisting>
Take special note of the
<link linkend="epoch"><mallctl>epoch</mallctl></link> mallctl, which
controls refreshing of cached dynamic statistics.</para>
<variablelist>
<varlistentry id="version">
@ -1422,8 +1432,7 @@ malloc_conf = "xmalloc:true";]]></programlisting>
<literal>--</literal>
</term>
<listitem><para>Purge all unused dirty pages for arena &lt;i&gt;, or for
all arenas if &lt;i&gt; equals <link
linkend="arenas.narenas"><mallctl>arenas.narenas</mallctl></link>.
all arenas if &lt;i&gt; equals <constant>MALLCTL_ARENAS_ALL</constant>.
</para></listitem>
</varlistentry>
@ -1434,10 +1443,9 @@ malloc_conf = "xmalloc:true";]]></programlisting>
<literal>--</literal>
</term>
<listitem><para>Trigger decay-based purging of unused dirty pages for
arena &lt;i&gt;, or for all arenas if &lt;i&gt; equals <link
linkend="arenas.narenas"><mallctl>arenas.narenas</mallctl></link>.
The proportion of unused dirty pages to be purged depends on the current
time; see <link
arena &lt;i&gt;, or for all arenas if &lt;i&gt; equals
<constant>MALLCTL_ARENAS_ALL</constant>. The proportion of unused dirty
pages to be purged depends on the current time; see <link
linkend="opt.decay_time"><mallctl>opt.decay_time</mallctl></link> for
details.</para></listitem>
</varlistentry>
@ -1465,9 +1473,8 @@ malloc_conf = "xmalloc:true";]]></programlisting>
</term>
<listitem><para>Set the precedence of dss allocation as related to mmap
allocation for arena &lt;i&gt;, or for all arenas if &lt;i&gt; equals
<link
linkend="arenas.narenas"><mallctl>arenas.narenas</mallctl></link>. See
<link linkend="opt.dss"><mallctl>opt.dss</mallctl></link> for supported
<constant>MALLCTL_ARENAS_ALL</constant>. See <link
linkend="opt.dss"><mallctl>opt.dss</mallctl></link> for supported
settings.</para></listitem>
</varlistentry>

4
include/jemalloc/internal/util.h
View File

@ -54,6 +54,10 @@
*/
#define JEMALLOC_ARG_CONCAT(...) __VA_ARGS__
/* cpp macro definition stringification. */
#define STRINGIFY_HELPER(x) #x
#define STRINGIFY(x) STRINGIFY_HELPER(x)
/*
* Silence compiler warnings due to uninitialized values. This is used
* wherever the compiler fails to recognize that the variable is never used

14
include/jemalloc/jemalloc_macros.h.in
View File

@ -31,6 +31,20 @@
*/
#define MALLOCX_ARENA(a) ((((int)(a))+1) << 20)
/*
* Use as arena index in "arena.<i>.{purge,decay,dss}" and
* "stats.arenas.<i>.*" mallctl interfaces to select all arenas. This
* definition is intentionally specified in raw decimal format to support
* cpp-based string concatenation, e.g.
*
* #define STRINGIFY_HELPER(x) #x
* #define STRINGIFY(x) STRINGIFY_HELPER(x)
*
* mallctl("arena." STRINGIFY(MALLCTL_ARENAS_ALL) ".purge", NULL, NULL, NULL,
* 0);
*/
#define MALLCTL_ARENAS_ALL 4096
#if defined(__cplusplus) && defined(JEMALLOC_USE_CXX_THROW)
# define JEMALLOC_CXX_THROW throw()
#else

198
src/ctl.c
View File

@ -443,6 +443,51 @@ static const ctl_named_node_t super_root_node[] = {
/******************************************************************************/
static unsigned
stats_arenas_i2a_impl(size_t i, bool compat, bool validate)
{
unsigned a;
cassert(config_stats);
switch (i) {
case MALLCTL_ARENAS_ALL:
a = 0;
break;
default:
if (compat && i == ctl_stats.narenas) {
/*
* Provide deprecated backward compatibility for
* accessing the merged stats at index narenas rather
* than via MALLCTL_ARENAS_ALL. This is scheduled for
* removal in 6.0.0.
*/
a = 0;
} else if (validate && i >= ctl_stats.narenas)
a = UINT_MAX;
else {
/*
* This function should never be called for an index
* more than one past the range of indices that have
* initialized stats.
*/
assert(i < ctl_stats.narenas || (!validate && i ==
ctl_stats.narenas));
a = (unsigned)i + 1;
}
break;
}
return (a);
}
static ctl_arena_stats_t *
stats_arenas_i(size_t i)
{
return (&ctl_stats.arenas[stats_arenas_i2a_impl(i, true, false)]);
}
static void
ctl_arena_clear(ctl_arena_stats_t *astats)
{
@ -552,8 +597,8 @@ ctl_arena_stats_smerge(ctl_arena_stats_t *sstats, ctl_arena_stats_t *astats)
static void
ctl_arena_refresh(tsdn_t *tsdn, arena_t *arena, unsigned i)
{
ctl_arena_stats_t *astats = &ctl_stats.arenas[i];
ctl_arena_stats_t *sstats = &ctl_stats.arenas[ctl_stats.narenas];
ctl_arena_stats_t *astats = stats_arenas_i(i);
ctl_arena_stats_t *sstats = stats_arenas_i(MALLCTL_ARENAS_ALL);
ctl_arena_clear(astats);
ctl_arena_stats_amerge(tsdn, astats, arena);
@ -580,16 +625,6 @@ ctl_grow(tsdn_t *tsdn, extent_hooks_t *extent_hooks)
memcpy(astats, ctl_stats.arenas, (ctl_stats.narenas + 1) *
sizeof(ctl_arena_stats_t));
memset(&astats[ctl_stats.narenas + 1], 0, sizeof(ctl_arena_stats_t));
/* Swap merged stats to their new location. */
{
ctl_arena_stats_t tstats;
memcpy(&tstats, &astats[ctl_stats.narenas],
sizeof(ctl_arena_stats_t));
memcpy(&astats[ctl_stats.narenas],
&astats[ctl_stats.narenas + 1], sizeof(ctl_arena_stats_t));
memcpy(&astats[ctl_stats.narenas + 1], &tstats,
sizeof(ctl_arena_stats_t));
}
a0dalloc(ctl_stats.arenas);
ctl_stats.arenas = astats;
ctl_stats.narenas++;
@ -601,40 +636,36 @@ static void
ctl_refresh(tsdn_t *tsdn)
{
unsigned i;
ctl_arena_stats_t *sstats = stats_arenas_i(MALLCTL_ARENAS_ALL);
VARIABLE_ARRAY(arena_t *, tarenas, ctl_stats.narenas);
/*
* Clear sum stats, since they will be merged into by
* ctl_arena_refresh().
*/
ctl_arena_clear(&ctl_stats.arenas[ctl_stats.narenas]);
ctl_arena_clear(sstats);
for (i = 0; i < ctl_stats.narenas; i++)
tarenas[i] = arena_get(tsdn, i, false);
for (i = 0; i < ctl_stats.narenas; i++) {
ctl_arena_stats_t *astats = stats_arenas_i(i);
bool initialized = (tarenas[i] != NULL);
ctl_stats.arenas[i].initialized = initialized;
astats->initialized = initialized;
if (initialized)
ctl_arena_refresh(tsdn, tarenas[i], i);
}
if (config_stats) {
ctl_stats.allocated =
ctl_stats.arenas[ctl_stats.narenas].allocated_small +
ctl_stats.arenas[ctl_stats.narenas].astats.allocated_large;
ctl_stats.active =
(ctl_stats.arenas[ctl_stats.narenas].pactive << LG_PAGE);
ctl_stats.metadata =
ctl_stats.arenas[ctl_stats.narenas].astats.base +
ctl_stats.arenas[ctl_stats.narenas].astats.internal;
ctl_stats.resident =
ctl_stats.arenas[ctl_stats.narenas].astats.resident;
ctl_stats.mapped =
ctl_stats.arenas[ctl_stats.narenas].astats.mapped;
ctl_stats.retained =
ctl_stats.arenas[ctl_stats.narenas].astats.retained;
ctl_stats.allocated = sstats->allocated_small +
sstats->astats.allocated_large;
ctl_stats.active = (sstats->pactive << LG_PAGE);
ctl_stats.metadata = sstats->astats.base +
sstats->astats.internal;
ctl_stats.resident = sstats->astats.resident;
ctl_stats.mapped = sstats->astats.mapped;
ctl_stats.retained = sstats->astats.retained;
}
ctl_epoch++;
@ -660,7 +691,7 @@ ctl_init(tsdn_t *tsdn)
}
memset(ctl_stats.arenas, 0, (ctl_stats.narenas + 1) *
sizeof(ctl_arena_stats_t));
ctl_stats.arenas[ctl_stats.narenas].initialized = true;
stats_arenas_i(MALLCTL_ARENAS_ALL)->initialized = true;
ctl_epoch = 0;
ctl_refresh(tsdn);
@ -1399,7 +1430,11 @@ arena_i_purge(tsdn_t *tsdn, unsigned arena_ind, bool all)
{
unsigned narenas = ctl_stats.narenas;
if (arena_ind == narenas) {
/*
* Access via index narenas is deprecated, and scheduled for
* removal in 6.0.0.
*/
if (arena_ind == MALLCTL_ARENAS_ALL || arena_ind == narenas) {
unsigned i;
VARIABLE_ARRAY(arena_t *, tarenas, narenas);
@ -1482,6 +1517,10 @@ arena_i_reset_ctl(tsd_t *tsd, const size_t *mib, size_t miblen, void *oldp,
assert(arena_ind >= opt_narenas);
arena = arena_get(tsd_tsdn(tsd), arena_ind, false);
if (arena == NULL) {
ret = EFAULT;
goto label_return;
}
arena_reset(tsd, arena);
@ -1520,7 +1559,18 @@ arena_i_dss_ctl(tsd_t *tsd, const size_t *mib, size_t miblen, void *oldp,
}
}
if (arena_ind < ctl_stats.narenas) {
/*
* Access via index narenas is deprecated, and scheduled for removal in
* 6.0.0.
*/
if (arena_ind == MALLCTL_ARENAS_ALL || arena_ind == ctl_stats.narenas) {
if (dss_prec != dss_prec_limit &&
extent_dss_prec_set(dss_prec)) {
ret = EFAULT;
goto label_return;
}
dss_prec_old = extent_dss_prec_get();
} else {
arena_t *arena = arena_get(tsd_tsdn(tsd), arena_ind, false);
if (arena == NULL || (dss_prec != dss_prec_limit &&
arena_dss_prec_set(tsd_tsdn(tsd), arena, dss_prec))) {
@ -1528,13 +1578,6 @@ arena_i_dss_ctl(tsd_t *tsd, const size_t *mib, size_t miblen, void *oldp,
goto label_return;
}
dss_prec_old = arena_dss_prec_get(tsd_tsdn(tsd), arena);
} else {
if (dss_prec != dss_prec_limit &&
extent_dss_prec_set(dss_prec)) {
ret = EFAULT;
goto label_return;
}
dss_prec_old = extent_dss_prec_get();
}
dss = dss_prec_names[dss_prec_old];
@ -1621,7 +1664,7 @@ arena_i_index(tsdn_t *tsdn, const size_t *mib, size_t miblen, size_t i)
const ctl_named_node_t *ret;
malloc_mutex_lock(tsdn, &ctl_mtx);
if (i > ctl_stats.narenas) {
if (i > ctl_stats.narenas && i != MALLCTL_ARENAS_ALL) {
ret = NULL;
goto label_return;
}
@ -1675,7 +1718,7 @@ arenas_initialized_ctl(tsd_t *tsd, const size_t *mib, size_t miblen, void *oldp,
}
for (i = 0; i < nread; i++)
((bool *)oldp)[i] = ctl_stats.arenas[i].initialized;
((bool *)oldp)[i] = stats_arenas_i(i)->initialized;
label_return:
malloc_mutex_unlock(tsd_tsdn(tsd), &ctl_mtx);
@ -1896,64 +1939,65 @@ CTL_RO_CGEN(config_stats, stats_resident, ctl_stats.resident, size_t)
CTL_RO_CGEN(config_stats, stats_mapped, ctl_stats.mapped, size_t)
CTL_RO_CGEN(config_stats, stats_retained, ctl_stats.retained, size_t)
CTL_RO_GEN(stats_arenas_i_dss, ctl_stats.arenas[mib[2]].dss, const char *)
CTL_RO_GEN(stats_arenas_i_decay_time, ctl_stats.arenas[mib[2]].decay_time,
CTL_RO_GEN(stats_arenas_i_dss, stats_arenas_i(mib[2])->dss, const char *)
CTL_RO_GEN(stats_arenas_i_decay_time, stats_arenas_i(mib[2])->decay_time,
ssize_t)
CTL_RO_GEN(stats_arenas_i_nthreads, ctl_stats.arenas[mib[2]].nthreads, unsigned)
CTL_RO_GEN(stats_arenas_i_pactive, ctl_stats.arenas[mib[2]].pactive, size_t)
CTL_RO_GEN(stats_arenas_i_pdirty, ctl_stats.arenas[mib[2]].pdirty, size_t)
CTL_RO_GEN(stats_arenas_i_nthreads, stats_arenas_i(mib[2])->nthreads,
unsigned)
CTL_RO_GEN(stats_arenas_i_pactive, stats_arenas_i(mib[2])->pactive, size_t)
CTL_RO_GEN(stats_arenas_i_pdirty, stats_arenas_i(mib[2])->pdirty, size_t)
CTL_RO_CGEN(config_stats, stats_arenas_i_mapped,
ctl_stats.arenas[mib[2]].astats.mapped, size_t)
stats_arenas_i(mib[2])->astats.mapped, size_t)
CTL_RO_CGEN(config_stats, stats_arenas_i_retained,
ctl_stats.arenas[mib[2]].astats.retained, size_t)
stats_arenas_i(mib[2])->astats.retained, size_t)
CTL_RO_CGEN(config_stats, stats_arenas_i_npurge,
ctl_stats.arenas[mib[2]].astats.npurge, uint64_t)
stats_arenas_i(mib[2])->astats.npurge, uint64_t)
CTL_RO_CGEN(config_stats, stats_arenas_i_nmadvise,
ctl_stats.arenas[mib[2]].astats.nmadvise, uint64_t)
stats_arenas_i(mib[2])->astats.nmadvise, uint64_t)
CTL_RO_CGEN(config_stats, stats_arenas_i_purged,
ctl_stats.arenas[mib[2]].astats.purged, uint64_t)
stats_arenas_i(mib[2])->astats.purged, uint64_t)
CTL_RO_CGEN(config_stats, stats_arenas_i_base,
ctl_stats.arenas[mib[2]].astats.base, size_t)
stats_arenas_i(mib[2])->astats.base, size_t)
CTL_RO_CGEN(config_stats, stats_arenas_i_internal,
ctl_stats.arenas[mib[2]].astats.internal, size_t)
stats_arenas_i(mib[2])->astats.internal, size_t)
CTL_RO_CGEN(config_stats, stats_arenas_i_resident,
ctl_stats.arenas[mib[2]].astats.resident, size_t)
stats_arenas_i(mib[2])->astats.resident, size_t)
CTL_RO_CGEN(config_stats, stats_arenas_i_small_allocated,
ctl_stats.arenas[mib[2]].allocated_small, size_t)
stats_arenas_i(mib[2])->allocated_small, size_t)
CTL_RO_CGEN(config_stats, stats_arenas_i_small_nmalloc,
ctl_stats.arenas[mib[2]].nmalloc_small, uint64_t)
stats_arenas_i(mib[2])->nmalloc_small, uint64_t)
CTL_RO_CGEN(config_stats, stats_arenas_i_small_ndalloc,
ctl_stats.arenas[mib[2]].ndalloc_small, uint64_t)
stats_arenas_i(mib[2])->ndalloc_small, uint64_t)
CTL_RO_CGEN(config_stats, stats_arenas_i_small_nrequests,
ctl_stats.arenas[mib[2]].nrequests_small, uint64_t)
stats_arenas_i(mib[2])->nrequests_small, uint64_t)
CTL_RO_CGEN(config_stats, stats_arenas_i_large_allocated,
ctl_stats.arenas[mib[2]].astats.allocated_large, size_t)
stats_arenas_i(mib[2])->astats.allocated_large, size_t)
CTL_RO_CGEN(config_stats, stats_arenas_i_large_nmalloc,
ctl_stats.arenas[mib[2]].astats.nmalloc_large, uint64_t)
stats_arenas_i(mib[2])->astats.nmalloc_large, uint64_t)
CTL_RO_CGEN(config_stats, stats_arenas_i_large_ndalloc,
ctl_stats.arenas[mib[2]].astats.ndalloc_large, uint64_t)
stats_arenas_i(mib[2])->astats.ndalloc_large, uint64_t)
CTL_RO_CGEN(config_stats, stats_arenas_i_large_nrequests,
ctl_stats.arenas[mib[2]].astats.nmalloc_large, uint64_t) /* Intentional. */
stats_arenas_i(mib[2])->astats.nmalloc_large, uint64_t) /* Intentional. */
CTL_RO_CGEN(config_stats, stats_arenas_i_bins_j_nmalloc,
ctl_stats.arenas[mib[2]].bstats[mib[4]].nmalloc, uint64_t)
stats_arenas_i(mib[2])->bstats[mib[4]].nmalloc, uint64_t)
CTL_RO_CGEN(config_stats, stats_arenas_i_bins_j_ndalloc,
ctl_stats.arenas[mib[2]].bstats[mib[4]].ndalloc, uint64_t)
stats_arenas_i(mib[2])->bstats[mib[4]].ndalloc, uint64_t)
CTL_RO_CGEN(config_stats, stats_arenas_i_bins_j_nrequests,
ctl_stats.arenas[mib[2]].bstats[mib[4]].nrequests, uint64_t)
stats_arenas_i(mib[2])->bstats[mib[4]].nrequests, uint64_t)
CTL_RO_CGEN(config_stats, stats_arenas_i_bins_j_curregs,
ctl_stats.arenas[mib[2]].bstats[mib[4]].curregs, size_t)
stats_arenas_i(mib[2])->bstats[mib[4]].curregs, size_t)
CTL_RO_CGEN(config_stats && config_tcache, stats_arenas_i_bins_j_nfills,
ctl_stats.arenas[mib[2]].bstats[mib[4]].nfills, uint64_t)
stats_arenas_i(mib[2])->bstats[mib[4]].nfills, uint64_t)
CTL_RO_CGEN(config_stats && config_tcache, stats_arenas_i_bins_j_nflushes,
ctl_stats.arenas[mib[2]].bstats[mib[4]].nflushes, uint64_t)
stats_arenas_i(mib[2])->bstats[mib[4]].nflushes, uint64_t)
CTL_RO_CGEN(config_stats, stats_arenas_i_bins_j_nslabs,
ctl_stats.arenas[mib[2]].bstats[mib[4]].nslabs, uint64_t)
stats_arenas_i(mib[2])->bstats[mib[4]].nslabs, uint64_t)
CTL_RO_CGEN(config_stats, stats_arenas_i_bins_j_nreslabs,
ctl_stats.arenas[mib[2]].bstats[mib[4]].reslabs, uint64_t)
stats_arenas_i(mib[2])->bstats[mib[4]].reslabs, uint64_t)
CTL_RO_CGEN(config_stats, stats_arenas_i_bins_j_curslabs,
ctl_stats.arenas[mib[2]].bstats[mib[4]].curslabs, size_t)
stats_arenas_i(mib[2])->bstats[mib[4]].curslabs, size_t)
static const ctl_named_node_t *
stats_arenas_i_bins_j_index(tsdn_t *tsdn, const size_t *mib, size_t miblen,
@ -1966,13 +2010,13 @@ stats_arenas_i_bins_j_index(tsdn_t *tsdn, const size_t *mib, size_t miblen,
}
CTL_RO_CGEN(config_stats, stats_arenas_i_lextents_j_nmalloc,
ctl_stats.arenas[mib[2]].lstats[mib[4]].nmalloc, uint64_t)
stats_arenas_i(mib[2])->lstats[mib[4]].nmalloc, uint64_t)
CTL_RO_CGEN(config_stats, stats_arenas_i_lextents_j_ndalloc,
ctl_stats.arenas[mib[2]].lstats[mib[4]].ndalloc, uint64_t)
stats_arenas_i(mib[2])->lstats[mib[4]].ndalloc, uint64_t)
CTL_RO_CGEN(config_stats, stats_arenas_i_lextents_j_nrequests,
ctl_stats.arenas[mib[2]].lstats[mib[4]].nrequests, uint64_t)
stats_arenas_i(mib[2])->lstats[mib[4]].nrequests, uint64_t)
CTL_RO_CGEN(config_stats, stats_arenas_i_lextents_j_curlextents,
ctl_stats.arenas[mib[2]].lstats[mib[4]].curlextents, size_t)
stats_arenas_i(mib[2])->lstats[mib[4]].curlextents, size_t)
static const ctl_named_node_t *
stats_arenas_i_lextents_j_index(tsdn_t *tsdn, const size_t *mib, size_t miblen,
@ -1987,10 +2031,12 @@ stats_arenas_i_lextents_j_index(tsdn_t *tsdn, const size_t *mib, size_t miblen,
static const ctl_named_node_t *
stats_arenas_i_index(tsdn_t *tsdn, const size_t *mib, size_t miblen, size_t i)
{
const ctl_named_node_t * ret;
const ctl_named_node_t *ret;
size_t a;
malloc_mutex_lock(tsdn, &ctl_mtx);
if (i > ctl_stats.narenas || !ctl_stats.arenas[i].initialized) {
a = stats_arenas_i2a_impl(i, true, true);
if (a == UINT_MAX || !ctl_stats.arenas[a].initialized) {
ret = NULL;
goto label_return;
}

2
src/stats.c
View File

@ -841,7 +841,7 @@ stats_print_helper(void (*write_cb)(void *, const char *), void *cbopaque,
"\nMerged arenas stats:\n");
}
stats_arena_print(write_cb, cbopaque, json,
narenas, bins, large);
MALLCTL_ARENAS_ALL, bins, large);
if (json) {
malloc_cprintf(write_cb, cbopaque,
"\t\t\t}%s\n", (ninitialized > 1) ?

8
test/unit/mallctl.c
View File

@ -402,6 +402,10 @@ TEST_BEGIN(test_arena_i_purge)
mib[1] = narenas;
assert_d_eq(mallctlbymib(mib, miblen, NULL, NULL, NULL, 0), 0,
"Unexpected mallctlbymib() failure");
mib[1] = MALLCTL_ARENAS_ALL;
assert_d_eq(mallctlbymib(mib, miblen, NULL, NULL, NULL, 0), 0,
"Unexpected mallctlbymib() failure");
}
TEST_END
@ -422,6 +426,10 @@ TEST_BEGIN(test_arena_i_decay)
mib[1] = narenas;
assert_d_eq(mallctlbymib(mib, miblen, NULL, NULL, NULL, 0), 0,
"Unexpected mallctlbymib() failure");
mib[1] = MALLCTL_ARENAS_ALL;
assert_d_eq(mallctlbymib(mib, miblen, NULL, NULL, NULL, 0), 0,
"Unexpected mallctlbymib() failure");
}
TEST_END