Ralph,
To be honest any joker can probably have a "/proc" under any
non-Linux OS - there is noting sacred about the name. So, would in not
make the most sense (both simple and robust) to just check $target_os
and build exclusively for Linux?
-Paul
On 3/24/2011 7:01 PM, Ralph Castain wrote:
Thanks Paul - very illuminating!
Looks to me like I'm okay for OpenBSD as I won't find /proc and so won't build
the Linux module.
I have a problem with FreeBSD because /proc exists, but I won't find what I'm
looking for, so I'll have to add a test for that case and not-build when
FreeBSD is detected.
The "not-mounted" case for NetBSD is more problematic. For now, I think I'll
just use the safe method and not-build if NetBSD is detected.
Remember, folks - this is -not- system critical to running OMPI. At the moment, the info
isn't really even used for an MPI job. In the future this will change, and so the build
logic will become more important - but in that future, the "sysinfo" framework
disappears and is merged with other functionality that already knows how to resolve this.
So all we're trying to do here is help fill a temporary gap :-)
On Mar 24, 2011, at 7:52 PM, Paul H. Hargrove wrote:
Silas,
FYI: openmpi-1.4.1 is in the package repo for NetBSD 5.1. So, you might not
need to build from scratch at all, depending on your desired use.
Jeff,
When available (remember that unlike Linux /proc might not be mounted by
default) the /proc/cpuinfo and /proc/meminfo on NetBSD 5.1 are (nearly?)
identical to the Linux ones. See below for an example.
To "prefetch" the next logical question:
On a FreeBSD 8.1 system I find that /proc exists but does not contain cpuinfo
or meminfo
On a OpenBSD 4.8 system I find that there is no /proc
-Paul
-bash-4.1$ uname -a
NetBSD netbsd5-amd64.xen 5.1 NetBSD 5.1 (XEN3_DOMU) #0: Sat Nov 6 13:17:16 UTC
2010
bui...@b6.netbsd.org:/home/builds/ab/netbsd-5-1-RELEASE/amd64/201011061943Z-obj/home/builds/ab/netbsd-5-1-RELEASE/src/sys/arch/amd64/compile/XEN3_DOMU
amd64
-bash-4.1$ cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 7
model name : Intel(R) Xeon(R) CPU E5410 @ 2.33GHz
stepping : 6
cpu MHz : 2333.42
fdiv_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : no
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall mmxext fxsr_opt
rdtscp lm 3dnow recovery longrun lrti cxmmx cyrix_arr centaur_mcr constant_tsc
pni monitor ds_cpi vmx est tm2 cx16
-bash-4.1$ cat /proc/meminfo
total: used: free: shared: buffers: cached:
Mem: 1031933952 796835840 235098112 0 542756864 555749376
Swap: 134213632 0 134213632
MemTotal: 1007748 kB
MemFree: 229588 kB
MemShared: 0 kB
Buffers: 530036 kB
Cached: 542724 kB
SwapTotal: 131068 kB
SwapFree: 131068 kB
On 3/24/2011 6:07 PM, Jeff Squyres wrote:
Is the data the same in /proc between NetBSD and Linux?
We're currently looking in /proc/cpuinfo and /proc/meminfo for some specific
key / data pairs.
On Mar 24, 2011, at 2:29 PM, Silas Silva wrote:
Hello there,
I'm using OpenMPI for educational reasons. It works pretty fine under
GNU/Linux. I have both compiled it and downloaded it from the package
management system with no problems.
But I have trying to use it in other Unix systems as well. In these
systems /proc (NetBSD for instance) is by default unmounted, so
./configure script cannot stat /proc/cpuinfo (although it does exist in
NetBSD if you manually mount /proc). In the case it cannot stat
/proc/cpuinfo, it just silently ignores compilation of
mca_sysinfo_linux.{so,la}.
Is this behaviour correct? Or it would be be a better idea that
configure script fail with a "please check /proc/cpuinfo or specify
--dont-build-sysinfo-linux"-like message?
Thank you very much.
--
Silas Silva
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--
Paul H. Hargrove phhargr...@lbl.gov
Future Technologies Group
HPC Research Department Tel: +1-510-495-2352
Lawrence Berkeley National Laboratory Fax: +1-510-486-6900
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_______________________________________________
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--
Paul H. Hargrove phhargr...@lbl.gov
Future Technologies Group
HPC Research Department Tel: +1-510-495-2352
Lawrence Berkeley National Laboratory Fax: +1-510-486-6900
