Hello, > I'm running torque 2.3.7 and maui 3.2.6. > Everything appears to working fine. I can submit jobs and they run > successfully. > I'll dump my configs, if required. > > I've got this weird problem where my nodes have 8GB of RAM, however when > I submit jobs to torque that request mem=8gb, they are never started by > maui. If I was to submit the same job to torque and request mem=7900mb, > maui will then start the job.
This is perfectly normal. > Pbsnodes in torque shows 8GB of memory: > > state = free > np = 8 > properties = corvus > ntype = cluster > status = opsys=linux,uname=Linux 2.6.16.46-0.12-smp #1 SMP Thu May > 17 14:00:09 UTC 2007 x86_64,sessions=? 0,nsessions=? > 0,nusers=0,idletime=0,totmem=24563472kb,availmem=24433724kb,physmem=8179480kb,ncpus=8,loadave=0.00,netload=28007785,state=free,jobs=,varattr=,rectime=1280298000 No, this is not 8 GB, but 8179480 KB, which is *not* the same. As 1 MB = 1024 KB and 1 GB = 1024 KB, this means that 8179480 KB is 7987,7734 MB and is also 7,80056 GB. You have to remember that the OS takes some memory that is not available to programs. If you type the command "free" on this compute node, you will see that you do not have the full 8 GB available. > But when I run the maui command checknode it shows: > > checking node > State: Idle (in current state for 00:10:08) > Configured Resources: PROCS: 8 MEM: 7987M SWAP: 23G DISK: 1M So Maui shows the same memory as pbsnodes, but rounded down to integer megabytes. > Does anyone have an idea why maui seems to show slightly less than 8GB > or rather 8000mb? > Is this a problem with maui, or should I be looking at torque instead? That is how Linux works (and probably other Unix systems too). -- Michel Béland, analyste en calcul scientifique [email protected] bureau S-250, pavillon Roger-Gaudry (principal), Université de Montréal téléphone : 514 343-6111 poste 3892 télécopieur : 514 343-2155 RQCHP (Réseau québécois de calcul de haute performance) www.rqchp.ca Calcul Canada (computecanada.org) _______________________________________________ mauiusers mailing list [email protected] http://www.supercluster.org/mailman/listinfo/mauiusers
