[#59462] [ruby-trunk - Bug #9342][Open] [PATCH] SizedQueue#clear does not notify waiting threads in Ruby 1.9.3 — "jsc (Justin Collins)" <redmine@...>

9 messages 2014/01/02

[#59466] [ruby-trunk - Bug #9343][Open] [PATCH] SizedQueue#max= wakes up waiters properly — "normalperson (Eric Wong)" <normalperson@...>

11 messages 2014/01/02

[#59498] [ruby-trunk - Bug #9352][Open] [BUG] rb_sys_fail_str(connect(2) for [fe80::1%lo0]:3000) - errno == 0 — "kain (Claudio Poli)" <claudio@...>

10 messages 2014/01/03

[#59516] [ruby-trunk - Bug #9356][Open] TCPSocket.new does not seem to handle INTR — "charliesome (Charlie Somerville)" <charliesome@...>

48 messages 2014/01/03

[#59538] [ruby-trunk - Feature #9362][Assigned] Minimize cache misshit to gain optimal speed — "shyouhei (Shyouhei Urabe)" <shyouhei@...>

33 messages 2014/01/03
[#59541] Re: [ruby-trunk - Feature #9362][Assigned] Minimize cache misshit to gain optimal speed — Eric Wong <normalperson@...> 2014/01/04

Hi, I noticed a trivial typo in array.c, and it fails building struct.c

[#59582] Re: [ruby-trunk - Feature #9362][Assigned] Minimize cache misshit to gain optimal speed — SASADA Koichi <ko1@...> 2014/01/06

Intersting challenge.

[#59583] [ruby-trunk - Bug #9367][Open] REXML::XmlDecl doesn't use user specified quotes — "bearmini (Takashi Oguma)" <bear.mini@...>

12 messages 2014/01/06

[#59642] [ruby-trunk - Bug #9384][Open] Segfault in ruby 2.1.0p0 — "cbliard (Christophe Bliard)" <christophe.bliard@...>

11 messages 2014/01/08

[#59791] About unmarshallable DRb objects life-time — Rodrigo Rosenfeld Rosas <rr.rosas@...>

A while ago I created a proof-of-concept that I intended to use in my

16 messages 2014/01/15
[#59794] Re: About unmarshallable DRb objects life-time — Eric Hodel <[email protected]> 2014/01/15

On 15 Jan 2014, at 11:58, Rodrigo Rosenfeld Rosas <[email protected]> =

[#59808] Re: About unmarshallable DRb objects life-time — Rodrigo Rosenfeld Rosas <rr.rosas@...> 2014/01/16

Em 15-01-2014 19:42, Eric Hodel escreveu:

[#59810] Re: About unmarshallable DRb objects life-time — Eric Hodel <[email protected]> 2014/01/16

On 16 Jan 2014, at 02:15, Rodrigo Rosenfeld Rosas <[email protected]> =

[#59826] Re: About unmarshallable DRb objects life-time — Rodrigo Rosenfeld Rosas <rr.rosas@...> 2014/01/17

Em 16-01-2014 19:43, Eric Hodel escreveu:

[#59832] Re: About unmarshallable DRb objects life-time — Eric Hodel <[email protected]> 2014/01/17

On 17 Jan 2014, at 04:22, Rodrigo Rosenfeld Rosas <[email protected]> =

[ruby-core:59632] Re: [ruby-trunk - Feature #9362][Assigned] Minimize cache misshit to gain optimal speed

From: Yusuke Endoh <mame@...>
Date: 2014-01-07 15:31:00 UTC
List: ruby-core #59632
Hello,

2014/1/7 Urabe Shyouhei <[email protected]>:
> My experiment on valgrind clearly shows decreasing number of L1 data read
> misshits.  I can say that at least.

Something is wrong.  In principle, using more memory should make cache
miss increase.
In fact, when I replicate your experiment with "perf stat", the number
of L1-dcache-load-misses increases about 1.5x: 3,846,577 -> 5,665,965.

Note that the elapsed time does not change in spite of the increased
cache misses.
So, I think there is actually an improvement.  But I guess it is not
due to cache misses.  There should be another reason.


# trunk
$ perf stat -e L1-dcache-load-misses -e cache-misses ./ruby
--disable-gems -e "0x400000.times { Object.new }"

 Performance counter stats for './ruby --disable-gems -e
0x400000.times { Object.new }':

         3,922,093 L1-dcache-load-misses
            69,527 cache-misses

       0.473115927 seconds time elapsed

# shyouhei/cachelined
$ perf stat -e L1-dcache-load-misses -e cache-misses ./ruby
--disable-gems -e "0x400000.times { Object.new }"

 Performance counter stats for './ruby --disable-gems -e
0x400000.times { Object.new }':

         5,644,399 L1-dcache-load-misses
            82,589 cache-misses

       0.473268687 seconds time elapsed

-- 
Yusuke Endoh <[email protected]>

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