This is a case of "don't shoot the messenger".
PAPI/perfmon is merely reporting the FLOP rate of the program in question.
Simple loops often don't come anywhere close to optimized routines like BLAS
or linpack. Remember that PAPI will only measure a single core, so quoting
the theoretical GFLOPS for a dual core system is an apples-and-oranges
comparison.
- dan
_____
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Ioan
Raicu
Sent: Tuesday, July 15, 2008 3:48 PM
To: [EMAIL PROTECTED]
Cc: perfmon2-devel@lists.sourceforge.net
Subject: Re: [perfmon2] trouble installing pfmon...
I'll try that out, thanks for the hint.
Another related question:
Does the PAPI software also use perfmon?
http://icl.cs.utk.edu/papi/software/index.html
I managed to get that installed, and I am playing with it right now. A
simple PAPI program that tries to measure the FLOPS for a simple for loop
gets about 0.7GFLOPS, but linpack gets 8GFLOPS on the same dual Itanium 2 at
1.3GHz. The theoretical GFLOPS is around 12GF, I believe for 2 Itanium
CPUs.
So, assuming the PAPI also uses perfmon, is it possible that perfmon is
under-reporting the FLOPS? Is there a more reliable way to compute FLOPS?
Thanks,
Ioan
stephane eranian wrote:
Hello again,
Which version of libpfm/pfmon are you using?
I have seen this problem before. I think the name of the field has
simply changed.
Please try with libpfm-3.4 and pfmon-3.4, they should still work on
older v2.6.29 and
perfmon v2.0 itanium systems.
You can grab them from our website: http://perfmon2.sf.net
On Tue, Jul 15, 2008 at 7:18 PM, Ioan Raicu <mailto:[EMAIL PROTECTED]>
<[EMAIL PROTECTED]> wrote:
Aha,
OK, so I found a IA64 machine, with kernel 2.6.9, but I don't have root
access to it. So I am installing from the sources:
[EMAIL PROTECTED] libpfm-3.1]$ make
...
gcc -Wall -I/mnt/autofs/home/iraicu/perfmon/libpfm-3.1/examples/../include
-O2 -g -c ita2_irr.c
gcc -Wall -o ita2_irr -O2 -g
-L/mnt/autofs/home/iraicu/perfmon/libpfm-3.1/examples/../libpfm ita2_irr.o
/mnt/autofs/home/iraicu/perfmon/libpfm-3.1/examples/../lib/libpfm.a -lm
make[1]: Leaving directory
`/mnt/autofs/home/iraicu/perfmon/libpfm-3.1/examples'
make[1]: Entering directory
`/mnt/autofs/home/iraicu/perfmon/libpfm-3.1/include'
make[1]: Nothing to be done for `all'.
make[1]: Leaving directory
`/mnt/autofs/home/iraicu/perfmon/libpfm-3.1/include'
make[1]: Entering directory
`/mnt/autofs/home/iraicu/perfmon/libpfm-3.1/docs'
make[1]: Nothing to be done for `all'.
make[1]: Leaving directory `/mnt/autofs/home/iraicu/perfmon/libpfm-3.1/docs'
[EMAIL PROTECTED] libpfm-3.1]$ make install
make[1]: Entering directory `/mnt/autofs/home/iraicu/perfmon/libpfm-3.1/lib'
mkdir -p /home/iraicu/usr/local/lib
install -m 644 libpfm.a libpfm.so.3.1.0 /home/iraicu/usr/local/lib
make[1]: Leaving directory `/mnt/autofs/home/iraicu/perfmon/libpfm-3.1/lib'
make[1]: Entering directory
`/mnt/autofs/home/iraicu/perfmon/libpfm-3.1/examples'
make[1]: Nothing to be done for `install'.
make[1]: Leaving directory
`/mnt/autofs/home/iraicu/perfmon/libpfm-3.1/examples'
make[1]: Entering directory
`/mnt/autofs/home/iraicu/perfmon/libpfm-3.1/include'
mkdir -p /home/iraicu/usr/local/include/perfmon
install -m 644 perfmon/perfmon.h perfmon/perfmon_default_smpl.h
perfmon/pfmlib.h perfmon/pfmlib_comp.h perfmon/pfmlib_comp_ia64.h
perfmon/pfmlib_os.h perfmon/pfmlib_os_ia64.h perfmon/pfmlib_generic_ia64.h
perfmon/pfmlib_itanium.h perfmon/pfmlib_itanium2.h
/home/iraicu/usr/local/include/perfmon
make[1]: Leaving directory
`/mnt/autofs/home/iraicu/perfmon/libpfm-3.1/include'
make[1]: Entering directory
`/mnt/autofs/home/iraicu/perfmon/libpfm-3.1/docs'
mkdir -p /home/iraicu/usr/local/share/man/man3
( cd man3; install -m 644 *.3 /home/iraicu/usr/local/share/man/man3 )
make[1]: Leaving directory `/mnt/autofs/home/iraicu/perfmon/libpfm-3.1/docs'
This was OK, looked normal.
Then I try to compile pfmon, and I get:
bash-3.00$ make
make[1]: Entering directory
`/mnt/autofs/home/iraicu/perfmon/pfmon-3.0/pfmon'
gcc -Wall -I/home/iraicu/usr/local/include -I/usr/include/libelf -I. -O2 -g
-D_REENTRANT -D_GNU_SOURCE -DDESTROOT=\"/home/iraicu/usr/local\"
-DCONFIG_PFMON_GENERIC_IA64 -DCONFIG_PFMON_ITANIUM -DCONFIG_PFMON_ITANIUM2
-DCONFIG_PFMON_SMPL_MOD_RAW_IA64 -DCONFIG_PFMON_SMPL_MOD_COMPACT_IA64
-DCONFIG_PFMON_SMPL_MOD_EXAMPLE_IA64 -DCONFIG_PFMON_SMPL_MOD_BTB_IA64
-DCONFIG_PFMON_SMPL_MOD_DET_ITA -DCONFIG_PFMON_SMPL_MOD_DET_ITA2
-DPFMON_DEBUG -c pfmon.c
gcc -Wall -I/home/iraicu/usr/local/include -I/usr/include/libelf -I. -O2 -g
-D_REENTRANT -D_GNU_SOURCE -DDESTROOT=\"/home/iraicu/usr/local\"
-DCONFIG_PFMON_GENERIC_IA64 -DCONFIG_PFMON_ITANIUM -DCONFIG_PFMON_ITANIUM2
-DCONFIG_PFMON_SMPL_MOD_RAW_IA64 -DCONFIG_PFMON_SMPL_MOD_COMPACT_IA64
-DCONFIG_PFMON_SMPL_MOD_EXAMPLE_IA64 -DCONFIG_PFMON_SMPL_MOD_BTB_IA64
-DCONFIG_PFMON_SMPL_MOD_DET_ITA -DCONFIG_PFMON_SMPL_MOD_DET_ITA2
-DPFMON_DEBUG -c pfmon_smpl.c
gcc -Wall -I/home/iraicu/usr/local/include -I/usr/include/libelf -I. -O2 -g
-D_REENTRANT -D_GNU_SOURCE -DDESTROOT=\"/home/iraicu/usr/local\"
-DCONFIG_PFMON_GENERIC_IA64 -DCONFIG_PFMON_ITANIUM -DCONFIG_PFMON_ITANIUM2
-DCONFIG_PFMON_SMPL_MOD_RAW_IA64 -DCONFIG_PFMON_SMPL_MOD_COMPACT_IA64
-DCONFIG_PFMON_SMPL_MOD_EXAMPLE_IA64 -DCONFIG_PFMON_SMPL_MOD_BTB_IA64
-DCONFIG_PFMON_SMPL_MOD_DET_ITA -DCONFIG_PFMON_SMPL_MOD_DET_ITA2
-DPFMON_DEBUG -c pfmon_util.c
gcc -Wall -I/home/iraicu/usr/local/include -I/usr/include/libelf -I. -O2 -g
-D_REENTRANT -D_GNU_SOURCE -DDESTROOT=\"/home/iraicu/usr/local\"
-DCONFIG_PFMON_GENERIC_IA64 -DCONFIG_PFMON_ITANIUM -DCONFIG_PFMON_ITANIUM2
-DCONFIG_PFMON_SMPL_MOD_RAW_IA64 -DCONFIG_PFMON_SMPL_MOD_COMPACT_IA64
-DCONFIG_PFMON_SMPL_MOD_EXAMPLE_IA64 -DCONFIG_PFMON_SMPL_MOD_BTB_IA64
-DCONFIG_PFMON_SMPL_MOD_DET_ITA -DCONFIG_PFMON_SMPL_MOD_DET_ITA2
-DPFMON_DEBUG -c pfmon_util_ia64.c
pfmon_util_ia64.c: In function `pfmon_get_breakpoint_addr':
pfmon_util_ia64.c:726: error: structure has no member named `_si_pad0'
make[1]: *** [pfmon_util_ia64.o] Error 1
make[1]: Leaving directory `/mnt/autofs/home/iraicu/perfmon/pfmon-3.0/pfmon'
make: *** [all] Error 2
I updated both config.mk for both libpfm and pfmon. Note that for libpfm, I
had to modify the default compiler from icc to gcc, and I changed the
install path.
Any ideas on what I am missing, that is preventing pfmon from compiling?
Thanks,
Ioan
stephane eranian wrote:
Hello,
You are missing the kernel support. Suse does have perfmon
support in 2.6.x kernels but that is on Itanium systems only, I think.
On Tue, Jul 15, 2008 at 6:50 PM, Ioan Raicu <mailto:[EMAIL PROTECTED]>
<[EMAIL PROTECTED]> wrote:
Hi,
I have installed the following RPMs.
libpfm-3.4-1.fc10.x86_64.rpm
pfmon-3.4-1.fc10.x86_64.rpm
I then tried to run pfmon, but I got:
[EMAIL PROTECTED]:~/perfmon> pfmon
host kernel is missing perfmon support or /sys is not available
My pfmon version is 3.4. I am also running Suse 10 on dual 54xx Xeon
CPUs.
[EMAIL PROTECTED]:~/perfmon> uname -a
Linux gto 2.6.22.5-31-default #1 SMP 2007/09/21 22:29:00 UTC x86_64
x86_64 x86_64 GNU/Linux
I assume that my kernel doesn't have the support for perfmon enabled,
although I read online that Suse does have perfmon support in kernel
2.6.x. Are there instructions on how I can add perfmon support to my
kernel? Or is it simply another RPM (which I couldn't find) I can install?
Thanks in advance,
Ioan
--
===================================================
Ioan Raicu
Ph.D. Candidate
===================================================
Distributed Systems Laboratory
Computer Science Department
University of Chicago
1100 E. 58th Street, Ryerson Hall
Chicago, IL 60637
===================================================
Email: [EMAIL PROTECTED]
Web: http://www.cs.uchicago.edu/~iraicu
http://dev.globus.org/wiki/Incubator/Falkon
http://dsl-wiki.cs.uchicago.edu/index.php/Main_Page
===================================================
===================================================
-------------------------------------------------------------------------
This SF.Net email is sponsored by the Moblin Your Move Developer's challenge
Build the coolest Linux based applications with Moblin SDK & win great
prizes
Grand prize is a trip for two to an Open Source event anywhere in the world
http://moblin-contest.org/redirect.php?banner_id=100
<http://moblin-contest.org/redirect.php?banner_id=100&url=/> &url=/
_______________________________________________
perfmon2-devel mailing list
perfmon2-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/perfmon2-devel
--
===================================================
Ioan Raicu
Ph.D. Candidate
===================================================
Distributed Systems Laboratory
Computer Science Department
University of Chicago
1100 E. 58th Street, Ryerson Hall
Chicago, IL 60637
===================================================
Email: [EMAIL PROTECTED]
Web: http://www.cs.uchicago.edu/~iraicu
http://dev.globus.org/wiki/Incubator/Falkon
http://dsl-wiki.cs.uchicago.edu/index.php/Main_Page
===================================================
===================================================
--
===================================================
Ioan Raicu
Ph.D. Candidate
===================================================
Distributed Systems Laboratory
Computer Science Department
University of Chicago
1100 E. 58th Street, Ryerson Hall
Chicago, IL 60637
===================================================
Email: [EMAIL PROTECTED]
Web: http://www.cs.uchicago.edu/~iraicu
http://dev.globus.org/wiki/Incubator/Falkon
http://dsl-wiki.cs.uchicago.edu/index.php/Main_Page
===================================================
===================================================
-------------------------------------------------------------------------
This SF.Net email is sponsored by the Moblin Your Move Developer's challenge
Build the coolest Linux based applications with Moblin SDK & win great prizes
Grand prize is a trip for two to an Open Source event anywhere in the world
http://moblin-contest.org/redirect.php?banner_id=100&url=/
_______________________________________________
perfmon2-devel mailing list
perfmon2-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/perfmon2-devel
