Upon profiling the code, I've found that:
1) 4.5.3 built with gcc-295 and 4.7 built with gcc-32 on Linux run pretty close to the same speed when compiled -O2 -g. The differences in speed are neglegable, within a few miliseconds.
2) 4.5.3 built with gcc-295 and 4.7 built with gcc-32 on Solaris exhibit huge performance differences. 4.7 is about 10x slower than 4.5.3. Again, in the release tree compiled with -O2 -g. I do not see this problem on Linux, so I'm inclined to believe it is not something in my code. Also, the Linux tree will compile up -O2 -g -finline-limit=2750 in about 90 minutes. The Solaris tree takes about 16 hours for the same build.
I'll post the correct compile line at the bottom of this message.
Thanks for the help!
---[ Compile line from 4.7-SPARC using gcc-32 ]---
/opt/mvplocal/gcc-31/bin/g++ -c -fPIC -O2 -g -finline-limit=2750 -mcpu=v8 -mtune=ultrasparc -D__EXTENSIONS__ -DHAS_SYS_IOCTL_H -DHAS_SYS_FILIO_H -DHAS_STRINGS_H -DHAS_SYS_IOCCOM_H -DHAS_SYS_TIME_H -DHAS_SYS_WAIT_H -DUNIXHOST -DTHREAD -D_PTHREADS -D_REENTRANT -D_POSIX_C_SOURCE=199506L -D_G_NO_EXTERN_TEMPLATES -funroll-loops -pipe -ansi -pedantic -Wimplicit -Wconversion -Wsign-compare -Wno-long-long -Wreorder -Woverloaded-virtual -Wsign-promo -Wredundant-decls -DIN_IS_LIBRARY -DDPC_DEBUG -DNO_ARRAY_BOUNDS_CHECKING -DSVR4 -I../.././include -I../.././include/libinc -I../.././include/localinc -DXMSTRINGDEFINES SharedPool.c -o SharedPool.sh
---[ Compile line from 4.5.3-SPARC using gcc-295 ]---
/opt/mvplocal/bin/g++ -c -fPIC -O2 -g -mcpu=v8 -mtune=ultrasparc -DSVR4 -D_POSIX_C_SOURCE=199506L -DTHREAD -D_REENTRANT -D__EXTENSIONS__ -I/usr/dt/include -I/usr/openwin/include -DUNIXHOST -D_PTHREADS -pipe -D_G_NO_EXTERN_TEMPLATES -funroll-loops -ansi -pedantic -Wimplicit -Wconversion -Wsign-compare -Wno-long-long -Wreorder -Woverloaded-virtual -Wsign-promo -DNEWRESULTS -DIN_IS_LIBRARY -DDPC_DEBUG -I../.././include -I../.././include/libinc -I../.././include/localinc RemoteCommseg.c -o RemoteCommseg.sh
-brian
Brian D. McGrew { brian@xxxxxxxxxxxxxxxxxxx || pacemakertaker@xxxxxxxxx }
--
> YOU! Off my planet!
On Apr 27, 2004, at 7:06 AM, Eljay Love-Jensen wrote:
Hi Brian,
I am unclear: what's the problem?
My first inkling is that your Solaris SPARC platform is x10 faster than your Linux x86 platform.
My second inkling is... how come you are not performance comparing optimized code (-O2 or -O3)? Unoptimized code can be notoriously ... er, umm ... unoptimized.
--Eljay
