diff options
| author | normal <normal@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2014-07-20 04:19:06 +0000 |
|---|---|---|
| committer | normal <normal@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2014-07-20 04:19:06 +0000 |
| commit | eeb05e8c119f8cab6434d90f21551b6bb2954778 (patch) | |
| tree | 7dc64b7eaf3b82e56331c7215ea976596f9dbefd | |
| parent | 910d081d02ec6fd1fbfe028755a94065bf4c2661 (diff) | |
rb_io_buffer_t: pack structure
* include/ruby/io.h (rb_io_buffer_t): pack structure
Reduces rb_io_t from 200 to 192 bytes, allowing rb_io_t to
occupy one less cache line.
[Feature #10050]
n.b. this leaves a 4-byte hole after the `cbuf' field which may
be used for future expansion.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46884 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
| -rw-r--r-- | ChangeLog | 7 | ||||
| -rw-r--r-- | include/ruby/io.h | 4 |
2 files changed, 9 insertions, 2 deletions
@@ -1,3 +1,10 @@ +Sun Jul 20 12:44:23 2014 Eric Wong <e@80x24.org> + + * include/ruby/io.h (rb_io_buffer_t): pack structure + Reduces rb_io_t from 200 to 192 bytes, allowing rb_io_t to + occupy one less cache line. + [Feature #10050] + Sun Jul 20 12:41:53 2014 Eric Wong <e@80x24.org> * include/ruby/io.h (rb_io_t): shrink to 200 bytes from 216 on 64-bit diff --git a/include/ruby/io.h b/include/ruby/io.h index bdde9844e2..8f0367707e 100644 --- a/include/ruby/io.h +++ b/include/ruby/io.h @@ -51,12 +51,12 @@ extern "C" { RUBY_SYMBOL_EXPORT_BEGIN -typedef struct { +typedef PACKED_STRUCT(struct { char *ptr; /* off + len <= capa */ int off; int len; int capa; -} rb_io_buffer_t; +}) rb_io_buffer_t; typedef struct rb_io_t { FILE *stdio_file; /* stdio ptr for read/write if available */ |