Introduction to Using the Origin2000 hecate things to know''' - PowerPoint PPT Presentation

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Introduction to Using the Origin2000 hecate things to know'''

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Title: Introduction to Using the Origin2000 hecate things to know'''

1
Introduction to Using theOrigin-2000
(hecate)things to know...

2
Hecate

3
Logging in

Always use secure shell ssh to connect (works
like rlogin but creates encrypted session)
ssh -l username hecate.princeton.edu
Answer yes if you see
Host key not found from the list of known
hosts.
Are you sure you want to continue connecting
(yes/no)?
(it creates an entry in the file
/.ssh/known_hosts)
Enter your password as you would normally do
To use ssh-agent with RSA authentication, see
http//w3.pppl.gov/info/pppl-unix/ssh_with_RSA_au
thentication.html

4
First thing you see

Last login Wed Jun 30 145608 1999 from
taurus.pppl.gov
You have mail.
--------------------------------------------------
-------------------------------------
Dedicated time
99/06/19 0001 - 99/06/19 0800 jps (cs)
--------------------------------------------------
--------------------------------------
To view the dedicated time again
cat /etc/motd
To ask for dedicated time, send a message to
sisyfolks_at_astro.princeton.edu 2 days in advance.
You get the whole machine for yourself but it
is only at night.
Use same format as above

5
Environment

6
To transfer files

secure copy scp
scp filename orion.pppl.govcode/src
scp username_at_orion.pppl.govtmp/c\.f
/code
hecate_talk.txt 7 KB 7.1 kB/s
ETA 000000 100
? Same restrictions as ssh
NFS mounted filesystem (user must have same uid
and gid to have same permissions)
/usr/pppl/work (hecate) ? /work (PPPL)
AFS (Andrew File System) /afs/pppl.gov/u
Use klog to obtain an AFS Token from the
Authentication Server (you have to enter your AFS
password) and gain write permission in your AFS
directory (you can also use ssh token forwarding,
port 1515)
see http//w3.pppl.gov/info/pppl-unix/AFS.html
(http//w3.pppl.gov/info/pppl-unix/ssh_with_RSA_a
uthentication.html)

7
Scratch disks

Use the scratch disks to run jobs with large
output files
You have to ask for a directory. You cannot
create it yourself. Nice but NO BACKUPS!
hecate33 df -kl
Filesystem Type kbytes
use avail use Mounted on
/dev/root xfs 4188256
2776528 1411728 67 /
/dev/xlv/xlv11 xfs 17775472
2051364 15724108 12 /scr11
/dev/xlv/xlv8 xfs 8884712
8822820 61892 100 /scr5
/dev/xlv/xlv5 xfs 8880616
8742460 138156 99 /scr2
/dev/xlv/xlv10 xfs 17775472
5967228 11808244 34 /scr10
/dev/xlv/xlv3 xfs 4788712
1893716 2894996 40 /export/home
/dev/dsk/dks4d1s0 xfs 4175968
2138104 2037864 52 /original
/dev/xlv/xlv6 xfs 8884712
7091596 1793116 80 /scr3
/dev/xlv/xlv7 xfs 8884712
8166236 718476 92 /scr4
/dev/xlv/xlv4 xfs 8880616
7754328 1126288 88 /scr1
/dev/xlv/xlv9 xfs 35550816
17554000 17996816 50 /scr9
/dev/dsk/dks4d2s7 xfs 8884712
7071876 1812836 80 /scr8
/dev/xlv/xlv1 xfs 71105632
62363740 8741892 88 /scr6
/dev/xlv/xlv0 xfs 106672736
104936992 1735744 99 /scr0
/dev/xlv/xlv2 xfs 142231648
64785880 77445768 46 /scr7

8
Compilers

9
Do I need -64 ???

When you compile with -n32, the chip executes
in 64-bit mode and the software restricts
addresses to 32 bits
Compile with -n32 when you want
To generate smaller executables than for -64
Executables to have fewer data cache misses and
less memory paging than for -64
Compile with -64 if your program
Requires more than 2 gigabytes of address space
Will overflow a 32-bit long integer (for C)
C Type -n32 -64 Fortran Type
------ ------- ------ --------------
char 8 8 character
short int 16 16 integer2
int 32 32 integer
long int 32 64 none
long long int 64 64 integer8
pointer 32 64 pointer
float 32 32 real
double 64 64 real8
long double 64 128 real16

10
Directory search for ld linker

Default search order
-n32 ? /usr/lib32, /lib32
-64 ? /usr/lib64, /lib64
-o32 ? /usr/lib, /lib
That is as far as it goes you have to know if
you are using -n32 or -64 for some libraries.

11
Libraries of interest

12
Debuggers

Compile program with -g for all debuggers
dbx ? comes with the system so always latest
version
(see man dbx)
cvd ? WorkShop pro debugger (SGI-style
graphics)
(see http//techpubs.sgi.com/library ? Books ?
Developer ? Developer Magic Debugger Users
Guide)
totalview ? Beta version only (GUI oriented)
(see /opt/totalview/docs/User_Guide.pdf (or .ps)
on hecate)
All of them can more or less debug multi-process
programs

13
Linking multi-language programs

Compile object files from the source files of
each language separately by using the -c option
cc -c more.c rest.c
f77 -c main.f
Use the compiler associated with the language of
the main program to link the objects
f77 main.o more.o rest.o

14
Running a job...