misc/131597: c++ exceptions very slow on FreeBSD 7.1/amd64

[Mikolaj Golub]

The following reply was made to PR misc/131597; it has been noted by GNATS.

From: Mikolaj Golub <to.my.trociny at gmail.com>
To: bug-followup at FreeBSD.org
Cc: Guillaume Morin <guillaume at morinfr.org>
Subject: Re: misc/131597: c++ exceptions very slow on FreeBSD 7.1/amd64
Date: Thu, 12 Feb 2009 12:25:18 +0200

 It looks like 6.x is not affected by this problem (or at least the situation
 is much better here). I have checked on several 6.x hosts and the output looks
 like this:
 
         0.55 real         0.55 user         0.00 sys
       1000  maximum resident set size
          4  average shared memory size
         33  average unshared data size
        133  average unshared stack size
         98  page reclaims
          0  page faults
          0  swaps
          0  block input operations
          0  block output operations
          0  messages sent
          0  messages received
          0  signals received
          1  voluntary context switches
         48  involuntary context switches
 
 In all cases sys time was zero. While on my 7.1-STABLE i386 (Core(TM)2 CPU 6400 @ 2.13GHz) box :
 
         1.93 real         0.58 user         1.34 sys
       1252  maximum resident set size
          4  average shared memory size
        732  average unshared data size
        128  average unshared stack size
        115  page reclaims
          0  page faults
          0  swaps
          0  block input operations
          0  block output operations
          0  messages sent
          0  messages received
          0  signals received
          1  voluntary context switches
         32  involuntary context switches
 
 or 7.1-RELEASE-p1 amd64 (Xeon(R) CPU E5450 @ 3.00GHz):
 
         3.93 real         3.80 user         0.12 sys
       1736  maximum resident set size
          4  average shared memory size
       1024  average unshared data size
        128  average unshared stack size
        135  page reclaims
          0  page faults
          0  swaps
          0  block input operations
          0  block output operations
          0  messages sent
          0  messages received
          0  signals received
          1  voluntary context switches
         41  involuntary context switches
 
 I have tried g++ both of v3.4 and v4.2 and hasn't noticed significant
 difference, in my tests 3.4 was a bit faster but it might be influence of
 external factors (host load).
 
 -- 
 Mikolaj Golub