Trace number 3711910

Some explanations

A solver is run under the control of another program named runsolver. runsolver is in charge of imposing the CPU time limit and the memory limit to the solver. It also monitors some information about the process. The trace of the execution of a solver is divided into four (or five) parts:
  1. SOLVER DATA
    This is the output of the solver (stdout and stderr).
    Note that some very long lines in this section may be truncated by your web browser ! In such a case, you may want to use the "Download as text" link to get the trace as a text file.

    When the --timestamp option is passed to the runsolver program, each line output by the solver is prepended with a timestamp which indicates at what time the line was output by the solver. Times are relative to the start of the program, given in seconds. The first timestamp (if present) is estimated CPU time. The last timestamp is wall clock time.

    As some 'v lines' may be very long (sometimes several megabytes), the 'v line' output by your solver may be split on several lines to help limit the size of the trace recorded in the database. In any case, the exact output of your solver is preserved in a trace file.
  2. VERIFIER DATA
    The output of the solver is piped to a verifier program which will search a value line "v " and, if found, will check that the given interpretation satisfies all constraints.
  3. CONVERSION SCRIPT DATA (Optionnal)
    When a conversion script is used, this section shows the messages that were output by the conversion script.
  4. WATCHER DATA
    This is the informations gathered by the runsolver program. It first prints the different limits. There's a first limit on CPU time set to X seconds (see the parameters in the trace). After this time has ellapsed, runsolver sends a SIGTERM and 2 seconds later a SIGKILL to the solver. For safety, there's also another limit set to X+30 seconds which will send a SIGXPU to the solver. The last limit is on the virtual memory used by the process (see the parameters in the trace).
    Every ten seconds, the runsolver process fetches the content of /proc/loadavg, /proc/pid/stat and /proc/pid/statm (see man proc) and prints it as raw data. This is only recorded in case we need to investigate the behaviour of a solver. The memory used by the solver (vsize) is also given every ten seconds.
    When the solver exits, runsolver prints some informations such as status and time. CPU usage is the ratio CPU Time/Real Time.
  5. LAUNCHER DATA
    These informations are related to the script which will launch the solver. The most important informations are the command line given to the solver, the md5sum of the different files and the dump of the /proc/cpuinfo and /proc/meminfo which provides some useful information on the computer.

Solver answer on this benchmark

Solver NameAnswerCPU timeWall clock time
toysat 2012-05-17? (exit code) 6.69498 6.69601

General information on the benchmark

Name/PARTIAL-BIGINT-LIN/wcsp/scens/
normalized-scen06reduc_wcsp.wbo
MD5SUMc6376a45287ec410a1be42a1f73e9b68
Bench CategoryPARTIAL-BIGINT-LIN (both soft and hard constraints, big integers, linear constraints)
Best result obtained on this benchmark
Best cost obtained on this benchmark
Best CPU time to get the best result obtained on this benchmark
Max-Satisfiable
Max-(Un)Satisfiability was proved
Best value of the cost
Optimality of the best cost was proved
Number of variables3196
Total number of constraints341814
Number of soft constraints341732
Number of constraints which are clauses341732
Number of constraints which are cardinality constraints (but not clauses)82
Number of constraints which are nor clauses,nor cardinality constraints0
Minimum length of a constraint1
Maximum length of a constraint44
Top cost 3389
Min constraint cost 1
Max constraint cost 2302
Sum of constraints costs 126251161
Biggest number in a constraint 1
Number of bits of the biggest number in a constraint 1
Biggest sum of numbers in a constraint 45
Number of bits of the biggest sum of numbers6
Number of products (including duplicates)0
Sum of products size (including duplicates)0
Number of different products0
Sum of products size0

Solver Data

6.59/6.66	c 2012-05-28T21:03:42+0200
6.59/6.66	c arch = x86_64
6.59/6.66	c os = linux
6.59/6.66	c compiler = ghc 7.4
6.59/6.66	c packages:
6.59/6.66	c   OptDir-0.0.1
6.59/6.66	c   array-0.4.0.0
6.59/6.66	c   base-4.5.0.0
6.59/6.66	c   bytestring-0.9.2.1
6.59/6.66	c   containers-0.4.2.1
6.59/6.66	c   deepseq-1.3.0.0
6.59/6.66	c   mtl-2.1.1
6.59/6.66	c   old_locale-1.0.0.4
6.59/6.66	c   parse_dimacs-1.2
6.59/6.66	c   parsec-3.1.2
6.59/6.66	c   queue-0.1.2
6.59/6.66	c   stm-2.3
6.59/6.66	c   time-1.4
6.59/6.66	c command line = ["--wbo","HOME/instance-3711910-1338231822.wbo"]
6.59/6.66	c #vars 3196
6.59/6.66	c #constraints 341814
6.59/6.66	Stack space overflow: current size 8388608 bytes.
6.59/6.66	Use `+RTS -Ksize -RTS' to increase it.

Verifier Data

ERROR: no interpretation found !

Watcher Data

runsolver Copyright (C) 2010-2011 Olivier ROUSSEL

This is runsolver version 3.3.1 (svn: 989)

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

command line: BIN/runsolver --timestamp -w /tmp/evaluation-result-3711910-1338231822/watcher-3711910-1338231822 -o /tmp/evaluation-result-3711910-1338231822/solver-3711910-1338231822 -C 1800 -W 1900 -M 15500 HOME/toysat --wbo HOME/instance-3711910-1338231822.wbo 

running on 4 cores: 1,3,5,7

Enforcing CPUTime limit (soft limit, will send SIGTERM then SIGKILL): 1800 seconds
Enforcing CPUTime limit (hard limit, will send SIGXCPU): 1830 seconds
Enforcing wall clock limit (soft limit, will send SIGTERM then SIGKILL): 1900 seconds
Enforcing VSIZE limit (soft limit, will send SIGTERM then SIGKILL): 15872000 KiB
Enforcing VSIZE limit (hard limit, stack expansion will fail with SIGSEGV, brk() and mmap() will return ENOMEM): 15923200 KiB
Current StackSize limit: 10240 KiB


[startup+0 s]
/proc/loadavg: 1.91 1.99 1.99 3/178 24247
/proc/meminfo: memFree=31150860/32873844 swapFree=7616/7616
[pid=24247] ppid=24245 vsize=6208 CPUtime=0 cores=1,3,5,7
/proc/24247/stat : 24247 (toysat) R 24245 24247 23365 0 -1 4202496 823 0 0 0 0 0 0 0 20 0 1 0 289306968 6356992 744 33554432000 4194304 8973514 140733274442832 140733274425928 7937344 0 0 0 34082818 0 0 0 17 5 0 0 0 0 0
/proc/24247/statm: 1552 744 422 1167 0 333 0

[startup+0.104134 s]
/proc/loadavg: 1.91 1.99 1.99 3/178 24247
/proc/meminfo: memFree=31150860/32873844 swapFree=7616/7616
[pid=24247] ppid=24245 vsize=12352 CPUtime=0.09 cores=1,3,5,7
/proc/24247/stat : 24247 (toysat) R 24245 24247 23365 0 -1 4202496 2365 0 0 0 9 0 0 0 20 0 1 0 289306968 12648448 2286 33554432000 4194304 8973514 140733274442832 140733274442328 7841851 0 2 0 34082818 0 0 0 17 5 0 0 0 0 0
/proc/24247/statm: 3088 2286 428 1167 0 1869 0
Current children cumulated CPU time (s) 0.09
Current children cumulated vsize (KiB) 12352

[startup+0.200332 s]
/proc/loadavg: 1.91 1.99 1.99 3/178 24247
/proc/meminfo: memFree=31150860/32873844 swapFree=7616/7616
[pid=24247] ppid=24245 vsize=18496 CPUtime=0.19 cores=1,3,5,7
/proc/24247/stat : 24247 (toysat) R 24245 24247 23365 0 -1 4202496 3901 0 0 0 18 1 0 0 20 0 1 0 289306968 18939904 3822 33554432000 4194304 8973514 140733274442832 140733274442328 7841851 0 2 0 34082818 0 0 0 17 5 0 0 0 0 0
/proc/24247/statm: 4624 3822 428 1167 0 3405 0
Current children cumulated CPU time (s) 0.19
Current children cumulated vsize (KiB) 18496

[startup+0.300331 s]
/proc/loadavg: 1.91 1.99 1.99 3/178 24247
/proc/meminfo: memFree=31150860/32873844 swapFree=7616/7616
[pid=24247] ppid=24245 vsize=23616 CPUtime=0.29 cores=1,3,5,7
/proc/24247/stat : 24247 (toysat) R 24245 24247 23365 0 -1 4202496 5181 0 0 0 28 1 0 0 20 0 1 0 289306968 24182784 5102 33554432000 4194304 8973514 140733274442832 140733274442328 7937344 0 0 0 34082818 0 0 0 17 5 0 0 0 0 0
/proc/24247/statm: 5904 5102 428 1167 0 4685 0
Current children cumulated CPU time (s) 0.29
Current children cumulated vsize (KiB) 23616

[startup+0.700288 s]
/proc/loadavg: 1.91 1.99 1.99 3/178 24247
/proc/meminfo: memFree=31150860/32873844 swapFree=7616/7616
[pid=24247] ppid=24245 vsize=52288 CPUtime=0.69 cores=1,3,5,7
/proc/24247/stat : 24247 (toysat) R 24245 24247 23365 0 -1 4202496 12349 0 0 0 65 4 0 0 20 0 1 0 289306968 53542912 12270 33554432000 4194304 8973514 140733274442832 140733274442328 7841851 0 2 0 34082818 0 0 0 17 5 0 0 0 0 0
/proc/24247/statm: 13072 12270 428 1167 0 11853 0
Current children cumulated CPU time (s) 0.69
Current children cumulated vsize (KiB) 52288

[startup+1.50029 s]
/proc/loadavg: 1.91 1.99 1.99 3/179 24248
/proc/meminfo: memFree=31084868/32873844 swapFree=7616/7616
[pid=24247] ppid=24245 vsize=95296 CPUtime=1.49 cores=1,3,5,7
/proc/24247/stat : 24247 (toysat) R 24245 24247 23365 0 -1 4202496 23101 0 0 0 142 7 0 0 20 0 1 0 289306968 97583104 23022 33554432000 4194304 8973514 140733274442832 140733274442328 7937344 0 0 0 34082818 0 0 0 17 5 0 0 0 0 0
/proc/24247/statm: 23824 23022 428 1167 0 22605 0
Current children cumulated CPU time (s) 1.49
Current children cumulated vsize (KiB) 95296

[startup+3.10027 s]
/proc/loadavg: 1.91 1.99 1.99 3/179 24248
/proc/meminfo: memFree=31025068/32873844 swapFree=7616/7616
[pid=24247] ppid=24245 vsize=175168 CPUtime=3.09 cores=1,3,5,7
/proc/24247/stat : 24247 (toysat) R 24245 24247 23365 0 -1 4202496 43069 0 0 0 297 12 0 0 20 0 1 0 289306968 179372032 42990 33554432000 4194304 8973514 140733274442832 140733274442328 7841851 0 2 0 34082818 0 0 0 17 5 0 0 0 0 0
/proc/24247/statm: 43792 42990 428 1167 0 42573 0
Current children cumulated CPU time (s) 3.09
Current children cumulated vsize (KiB) 175168

[startup+6.30029 s]
/proc/loadavg: 2.00 2.01 2.00 3/179 24248
/proc/meminfo: memFree=30827908/32873844 swapFree=7616/7616
[pid=24247] ppid=24245 vsize=430144 CPUtime=6.29 cores=1,3,5,7
/proc/24247/stat : 24247 (toysat) R 24245 24247 23365 0 -1 4202496 106830 0 0 0 598 31 0 0 20 0 1 0 289306968 440467456 106751 33554432000 4194304 8973514 140733274442832 140733274424832 7937344 0 0 0 34082818 0 0 0 17 5 0 0 0 0 0
/proc/24247/statm: 107536 106751 438 1167 0 106317 0
Current children cumulated CPU time (s) 6.29
Current children cumulated vsize (KiB) 430144

Solver just ended. Dumping a history of the last processes samples

[startup+6.5003 s]
/proc/loadavg: 2.00 2.01 2.00 3/179 24248
/proc/meminfo: memFree=30827908/32873844 swapFree=7616/7616
[pid=24247] ppid=24245 vsize=430144 CPUtime=6.49 cores=1,3,5,7
/proc/24247/stat : 24247 (toysat) R 24245 24247 23365 0 -1 4202496 106830 0 0 0 618 31 0 0 20 0 1 0 289306968 440467456 106751 33554432000 4194304 8973514 140733274442832 140733274424832 7937344 0 0 0 34082818 0 0 0 17 5 0 0 0 0 0
/proc/24247/statm: 107536 106751 438 1167 0 106317 0
Current children cumulated CPU time (s) 6.49
Current children cumulated vsize (KiB) 430144

[startup+6.6003 s]
/proc/loadavg: 2.00 2.01 2.00 3/179 24248
/proc/meminfo: memFree=30827908/32873844 swapFree=7616/7616
[pid=24247] ppid=24245 vsize=430144 CPUtime=6.59 cores=1,3,5,7
/proc/24247/stat : 24247 (toysat) R 24245 24247 23365 0 -1 4202496 106830 0 0 0 628 31 0 0 20 0 1 0 289306968 440467456 106751 33554432000 4194304 8973514 140733274442832 140733274424832 7937344 0 0 0 34082818 0 0 0 17 5 0 0 0 0 0
/proc/24247/statm: 107536 106751 438 1167 0 106317 0
Current children cumulated CPU time (s) 6.59
Current children cumulated vsize (KiB) 430144

Child status: 2
Real time (s): 6.69601
CPU time (s): 6.69498
CPU user time (s): 6.34504
CPU system time (s): 0.349946
CPU usage (%): 99.9847
Max. virtual memory (cumulated for all children) (KiB): 430144

getrusage(RUSAGE_CHILDREN,...) data:
user time used= 6.34504
system time used= 0.349946
maximum resident set size= 427052
integral shared memory size= 0
integral unshared data size= 0
integral unshared stack size= 0
page reclaims= 106842
page faults= 0
swaps= 0
block input operations= 0
block output operations= 0
messages sent= 0
messages received= 0
signals received= 0
voluntary context switches= 3
involuntary context switches= 12

runsolver used 0.010998 second user time and 0.037994 second system time

The end

Launcher Data

Begin job on node135 at 2012-05-28 21:03:42
IDJOB=3711910
IDBENCH=79581
IDSOLVER=2291
FILE ID=node135/3711910-1338231822
RUNJOBID= node135-1338222763-23382
PBS_JOBID= 14624622
Free space on /tmp= 71624 MiB

SOLVER NAME= toysat 2012-05-17
BENCH NAME= PB10/normalized-PB10/PARTIAL-BIGINT-LIN/wcsp/scens/normalized-scen06reduc_wcsp.wbo
COMMAND LINE= HOME/toysat --wbo BENCHNAME
RUNSOLVER COMMAND LINE= BIN/runsolver --timestamp -w /tmp/evaluation-result-3711910-1338231822/watcher-3711910-1338231822 -o /tmp/evaluation-result-3711910-1338231822/solver-3711910-1338231822 -C 1800 -W 1900 -M 15500  HOME/toysat --wbo HOME/instance-3711910-1338231822.wbo

TIME LIMIT= 1800 seconds
MEMORY LIMIT= 15500 MiB
NBCORE= 4

MD5SUM BENCH= c6376a45287ec410a1be42a1f73e9b68
RANDOM SEED=610636829

node135.alineos.net Linux 2.6.32-71.29.1.el6.x86_64 #1 SMP Mon Jun 27 19:49:27 BST 2011

/proc/cpuinfo:
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 26
model name	: Intel(R) Xeon(R) CPU           X5550  @ 2.67GHz
stepping	: 5
cpu MHz		: 2666.820
cache size	: 8192 KB
physical id	: 0
siblings	: 4
core id		: 0
cpu cores	: 4
apicid		: 0
initial apicid	: 0
fpu		: yes
fpu_exception	: yes
cpuid level	: 11
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm dca sse4_1 sse4_2 popcnt lahf_lm ida tpr_shadow vnmi flexpriority ept vpid
bogomips	: 5333.64
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management:

processor	: 1
vendor_id	: GenuineIntel
cpu family	: 6
model		: 26
model name	: Intel(R) Xeon(R) CPU           X5550  @ 2.67GHz
stepping	: 5
cpu MHz		: 2666.820
cache size	: 8192 KB
physical id	: 1
siblings	: 4
core id		: 0
cpu cores	: 4
apicid		: 16
initial apicid	: 16
fpu		: yes
fpu_exception	: yes
cpuid level	: 11
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm dca sse4_1 sse4_2 popcnt lahf_lm ida tpr_shadow vnmi flexpriority ept vpid
bogomips	: 5332.57
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management:

processor	: 2
vendor_id	: GenuineIntel
cpu family	: 6
model		: 26
model name	: Intel(R) Xeon(R) CPU           X5550  @ 2.67GHz
stepping	: 5
cpu MHz		: 2666.820
cache size	: 8192 KB
physical id	: 0
siblings	: 4
core id		: 1
cpu cores	: 4
apicid		: 2
initial apicid	: 2
fpu		: yes
fpu_exception	: yes
cpuid level	: 11
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm dca sse4_1 sse4_2 popcnt lahf_lm ida tpr_shadow vnmi flexpriority ept vpid
bogomips	: 5332.55
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management:

processor	: 3
vendor_id	: GenuineIntel
cpu family	: 6
model		: 26
model name	: Intel(R) Xeon(R) CPU           X5550  @ 2.67GHz
stepping	: 5
cpu MHz		: 2666.820
cache size	: 8192 KB
physical id	: 1
siblings	: 4
core id		: 1
cpu cores	: 4
apicid		: 18
initial apicid	: 18
fpu		: yes
fpu_exception	: yes
cpuid level	: 11
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm dca sse4_1 sse4_2 popcnt lahf_lm ida tpr_shadow vnmi flexpriority ept vpid
bogomips	: 5332.55
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management:

processor	: 4
vendor_id	: GenuineIntel
cpu family	: 6
model		: 26
model name	: Intel(R) Xeon(R) CPU           X5550  @ 2.67GHz
stepping	: 5
cpu MHz		: 2666.820
cache size	: 8192 KB
physical id	: 0
siblings	: 4
core id		: 2
cpu cores	: 4
apicid		: 4
initial apicid	: 4
fpu		: yes
fpu_exception	: yes
cpuid level	: 11
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm dca sse4_1 sse4_2 popcnt lahf_lm ida tpr_shadow vnmi flexpriority ept vpid
bogomips	: 5332.54
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management:

processor	: 5
vendor_id	: GenuineIntel
cpu family	: 6
model		: 26
model name	: Intel(R) Xeon(R) CPU           X5550  @ 2.67GHz
stepping	: 5
cpu MHz		: 2666.820
cache size	: 8192 KB
physical id	: 1
siblings	: 4
core id		: 2
cpu cores	: 4
apicid		: 20
initial apicid	: 20
fpu		: yes
fpu_exception	: yes
cpuid level	: 11
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm dca sse4_1 sse4_2 popcnt lahf_lm ida tpr_shadow vnmi flexpriority ept vpid
bogomips	: 5332.55
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management:

processor	: 6
vendor_id	: GenuineIntel
cpu family	: 6
model		: 26
model name	: Intel(R) Xeon(R) CPU           X5550  @ 2.67GHz
stepping	: 5
cpu MHz		: 2666.820
cache size	: 8192 KB
physical id	: 0
siblings	: 4
core id		: 3
cpu cores	: 4
apicid		: 6
initial apicid	: 6
fpu		: yes
fpu_exception	: yes
cpuid level	: 11
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm dca sse4_1 sse4_2 popcnt lahf_lm ida tpr_shadow vnmi flexpriority ept vpid
bogomips	: 5238.35
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management:

processor	: 7
vendor_id	: GenuineIntel
cpu family	: 6
model		: 26
model name	: Intel(R) Xeon(R) CPU           X5550  @ 2.67GHz
stepping	: 5
cpu MHz		: 2666.820
cache size	: 8192 KB
physical id	: 1
siblings	: 4
core id		: 3
cpu cores	: 4
apicid		: 22
initial apicid	: 22
fpu		: yes
fpu_exception	: yes
cpuid level	: 11
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm dca sse4_1 sse4_2 popcnt lahf_lm ida tpr_shadow vnmi flexpriority ept vpid
bogomips	: 5332.55
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management:


/proc/meminfo:
MemTotal:       32873844 kB
MemFree:        31150744 kB
Buffers:          326996 kB
Cached:           431152 kB
SwapCached:         1720 kB
Active:           711992 kB
Inactive:         193236 kB
Active(anon):     136940 kB
Inactive(anon):    12012 kB
Active(file):     575052 kB
Inactive(file):   181224 kB
Unevictable:        7616 kB
Mlocked:            7616 kB
SwapTotal:      67108856 kB
SwapFree:       67105800 kB
Dirty:             26636 kB
Writeback:             0 kB
AnonPages:        152192 kB
Mapped:            13416 kB
Shmem:               132 kB
Slab:             676356 kB
SReclaimable:     118296 kB
SUnreclaim:       558060 kB
KernelStack:        1480 kB
PageTables:         4276 kB
NFS_Unstable:          0 kB
Bounce:                0 kB
WritebackTmp:          0 kB
CommitLimit:    83545776 kB
Committed_AS:     259908 kB
VmallocTotal:   34359738367 kB
VmallocUsed:      346376 kB
VmallocChunk:   34341987860 kB
HardwareCorrupted:     0 kB
AnonHugePages:      2048 kB
HugePages_Total:       0
HugePages_Free:        0
HugePages_Rsvd:        0
HugePages_Surp:        0
Hugepagesize:       2048 kB
DirectMap4k:        7872 kB
DirectMap2M:    33538048 kB

Free space on /tmp at the end= 71616 MiB
End job on node135 at 2012-05-28 21:03:49