Rename huge_threshold to experimental, and tweak documentation.

This commit is contained in:
Qi Wang 2018-06-04 11:04:29 -07:00 committed by Qi Wang
parent ff622eeab5
commit cdf15b458a
6 changed files with 15 additions and 10 deletions

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@ -1055,7 +1055,9 @@ mallctl("arena." STRINGIFY(MALLCTL_ARENAS_ALL) ".decay",
linkend="arena.i.dirty_decay_ms"><mallctl>arena.&lt;i&gt;.dirty_decay_ms</mallctl></link>
for related dynamic control options. See <link
linkend="opt.muzzy_decay_ms"><mallctl>opt.muzzy_decay_ms</mallctl></link>
for a description of muzzy pages.</para></listitem>
for a description of muzzy pages. Note that when the huge_threshold
feature is enabled, the special auto arenas may use its own decay
settings.</para></listitem>
</varlistentry>
<varlistentry id="opt.muzzy_decay_ms">
@ -1763,10 +1765,11 @@ malloc_conf = "xmalloc:true";]]></programlisting>
to control allocation for arenas explicitly created via <link
linkend="arenas.create"><mallctl>arenas.create</mallctl></link> such
that all extents originate from an application-supplied extent allocator
(by specifying the custom extent hook functions during arena creation),
but the automatically created arenas will have already created extents
prior to the application having an opportunity to take over extent
allocation.</para>
(by specifying the custom extent hook functions during arena creation).
However, the API guarantees for the automatically created arenas may be
relaxed -- hooks set there may be called in a "best effort" fashion; in
addition there may be extents created prior to the application having an
opportunity to take over extent allocation.</para>
<programlisting language="C"><![CDATA[
typedef extent_hooks_s extent_hooks_t;

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@ -289,7 +289,7 @@ static const ctl_named_node_t opt_node[] = {
{NAME("dss"), CTL(opt_dss)},
{NAME("narenas"), CTL(opt_narenas)},
{NAME("percpu_arena"), CTL(opt_percpu_arena)},
{NAME("huge_threshold"), CTL(opt_huge_threshold)},
{NAME("experimental_huge_threshold"), CTL(opt_huge_threshold)},
{NAME("background_thread"), CTL(opt_background_thread)},
{NAME("max_background_threads"), CTL(opt_max_background_threads)},
{NAME("dirty_decay_ms"), CTL(opt_dirty_decay_ms)},

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@ -1147,7 +1147,9 @@ malloc_conf_init(void) {
CONF_HANDLE_SSIZE_T(opt_lg_tcache_max, "lg_tcache_max",
-1, (sizeof(size_t) << 3) - 1)
CONF_HANDLE_SIZE_T(opt_huge_threshold, "huge_threshold",
/* Experimental feature. Will be documented later.*/
CONF_HANDLE_SIZE_T(opt_huge_threshold,
"experimental_huge_threshold",
LARGE_MINCLASS, LARGE_MAXCLASS, yes, yes, false)
CONF_HANDLE_SIZE_T(opt_lg_extent_max_active_fit,
"lg_extent_max_active_fit", 0,

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@ -910,7 +910,7 @@ stats_general_print(emitter_t *emitter) {
OPT_WRITE_CHAR_P("dss")
OPT_WRITE_UNSIGNED("narenas")
OPT_WRITE_CHAR_P("percpu_arena")
OPT_WRITE_UNSIGNED("huge_threshold")
OPT_WRITE_SIZE_T("experimental_huge_threshold")
OPT_WRITE_CHAR_P("metadata_thp")
OPT_WRITE_BOOL_MUTABLE("background_thread", "background_thread")
OPT_WRITE_SSIZE_T_MUTABLE("dirty_decay_ms", "arenas.dirty_decay_ms")

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@ -1,7 +1,7 @@
#include "test/jemalloc_test.h"
/* Threshold: 2 << 20 = 2097152. */
const char *malloc_conf = "huge_threshold:2097152";
const char *malloc_conf = "experimental_huge_threshold:2097152";
#define HUGE_SZ (2 << 20)
#define SMALL_SZ (8)

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@ -164,7 +164,7 @@ TEST_BEGIN(test_mallctl_opt) {
TEST_MALLCTL_OPT(const char *, dss, always);
TEST_MALLCTL_OPT(unsigned, narenas, always);
TEST_MALLCTL_OPT(const char *, percpu_arena, always);
TEST_MALLCTL_OPT(size_t, huge_threshold, always);
TEST_MALLCTL_OPT(size_t, experimental_huge_threshold, always);
TEST_MALLCTL_OPT(bool, background_thread, always);
TEST_MALLCTL_OPT(ssize_t, dirty_decay_ms, always);
TEST_MALLCTL_OPT(ssize_t, muzzy_decay_ms, always);