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| author | Qi Wang <interwq@gwu.edu> | 2019-07-25 20:43:59 (GMT) |
|---|---|---|
| committer | Qi Wang <interwq@gmail.com> | 2019-07-25 22:25:58 (GMT) |
| commit | 9f6a9f4c1f78fd61297e01ae1521af9696d2023b (patch) | |
| tree | 8a9d51464cd879272acc283a6bdfe856a89b3a45 | |
| parent | 10fcff6c38c08bc2b1a672ff92701012944d843a (diff) | |
| download | jemalloc-9f6a9f4c1f78fd61297e01ae1521af9696d2023b.zip jemalloc-9f6a9f4c1f78fd61297e01ae1521af9696d2023b.tar.gz jemalloc-9f6a9f4c1f78fd61297e01ae1521af9696d2023b.tar.bz2 | |
Update manual for opt.retain (new default on Windows).
| -rw-r--r-- | doc/jemalloc.xml.in | 22 |
1 files changed, 11 insertions, 11 deletions
diff --git a/doc/jemalloc.xml.in b/doc/jemalloc.xml.in index e23ccb7..7fecda7 100644 --- a/doc/jemalloc.xml.in +++ b/doc/jemalloc.xml.in @@ -963,17 +963,17 @@ mallctl("arena." STRINGIFY(MALLCTL_ARENAS_ALL) ".decay", linkend="stats.retained">stats.retained</link> for related details). It also makes jemalloc use <citerefentry> <refentrytitle>mmap</refentrytitle><manvolnum>2</manvolnum> - </citerefentry> in a more greedy way, mapping larger chunks in one go. - This option is disabled by default unless discarding virtual memory is - known to trigger - platform-specific performance problems, e.g. for [64-bit] Linux, which - has a quirk in its virtual memory allocation algorithm that causes - semi-permanent VM map holes under normal jemalloc operation. Although - <citerefentry><refentrytitle>munmap</refentrytitle> - <manvolnum>2</manvolnum></citerefentry> causes issues on 32-bit Linux as - well, retaining virtual memory for 32-bit Linux is disabled by default - due to the practical possibility of address space exhaustion. - </para></listitem> + </citerefentry> or equivalent in a more greedy way, mapping larger + chunks in one go. This option is disabled by default unless discarding + virtual memory is known to trigger platform-specific performance + problems, namely 1) for [64-bit] Linux, which has a quirk in its virtual + memory allocation algorithm that causes semi-permanent VM map holes + under normal jemalloc operation; and 2) for [64-bit] Windows, which + disallows split / merged regions with + <parameter><constant>MEM_RELEASE</constant></parameter>. Although the + same issues may present on 32-bit platforms as well, retaining virtual + memory for 32-bit Linux and Windows is disabled by default due to the + practical possibility of address space exhaustion. </para></listitem> </varlistentry> <varlistentry id="opt.dss"> |