On Wed, Sep 5, 2012 at 4:20 PM, Stefan Teleman <[email protected]> wrote:
> But then there's another aspect -- which I probably failed to > highlight in my previous email: the per-object mutex implementation is > 20% *slower* than the class-static mutex implementation. > > class-static implementation: > real 2139.31 > user 2406.09 > sys 155.61 > > pe-object implementation: > real 2416.75 > user 2694.64 > sys 159.49 The above results are for the Intel compiler. Now here are the results with GCC 4.7.0: 1. with the static per-class mutex: # INFO (S1) (10 lines): # TEXT: # COMPILER: gcc 4.7.0, __VERSION__ = "4.7.0 20120507 (Red Hat 4.7.0-5)" # ENVIRONMENT: pentiumpro running linux-elf (Fedora release 17 (Beefy Miracle) (3.5.0-2.fc17.x86_64)) with glibc 2.15 # FILE: 22.locale.numpunct.mt.cpp # COMPILED: Sep 5 2012, 06:21:18 # COMMENT: thread safety ############################################################ [ ... ] # +-----------------------+----------+----------+----------+ # | DIAGNOSTIC | ACTIVE | TOTAL | INACTIVE | # +-----------------------+----------+----------+----------+ # | (S1) INFO | 11 | 11 | 0% | # | (S2) NOTE | 1 | 1 | 0% | # | (S8) ERROR | 0 | 3 | 100% | # | (S9) FATAL | 0 | 1 | 100% | # +-----------------------+----------+----------+----------+ real 2165.06 user 2428.08 sys 151.30 2. With the per-object mutex: # INFO (S1) (10 lines): # TEXT: # COMPILER: gcc 4.7.0, __VERSION__ = "4.7.0 20120507 (Red Hat 4.7.0-5)" # ENVIRONMENT: pentiumpro running linux-elf (Fedora release 17 (Beefy Miracle) (3.5.0-2.fc17.x86_64)) with glibc 2.15 # FILE: 22.locale.numpunct.mt.cpp # COMPILED: Sep 5 2012, 21:29:56 # COMMENT: thread safety ############################################################ # CLAUSE: lib.locale.numpunct [ ... ] # +-----------------------+----------+----------+----------+ # | DIAGNOSTIC | ACTIVE | TOTAL | INACTIVE | # +-----------------------+----------+----------+----------+ # | (S1) INFO | 11 | 11 | 0% | # | (S2) NOTE | 1 | 1 | 0% | # | (S8) ERROR | 0 | 3 | 100% | # | (S9) FATAL | 0 | 1 | 100% | # +-----------------------+----------+----------+----------+ real 2438.70 user 2726.44 sys 155.79 About the same percentage difference as the Intel compiler. --Stefan --- Stefan Teleman KDE e.V. [email protected]
