runsolver Copyright (C) 2010-2011 Olivier ROUSSEL
This is runsolver version 3.3.0 (svn: 935)
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-3281173-1303750842/watcher-3281173-1303750842 -o /tmp/evaluation-result-3281173-1303750842/solver-3281173-1303750842 -C 2400 -W 1300 -M 7680 kw --tmp-path=HOME HOME/instance-3281173-1303750842.cnf
running on 2 cores: 5,7
Enforcing CPUTime limit (soft limit, will send SIGTERM then SIGKILL): 2400 seconds
Enforcing CPUTime limit (hard limit, will send SIGXCPU): 2430 seconds
Enforcing wall clock limit (soft limit, will send SIGTERM then SIGKILL): 1300 seconds
Enforcing VSIZE limit (soft limit, will send SIGTERM then SIGKILL): 7864320 KiB
Enforcing VSIZE limit (hard limit, stack expansion will fail with SIGSEGV, brk() and mmap() will return ENOMEM): 7915520 KiB
Current StackSize limit: 10240 KiB
[startup+0 s]
/proc/loadavg: 3.82 3.95 3.72 4/189 9438
/proc/meminfo: memFree=12916140/32951124 swapFree=67111528/67111528
[pid=9438] ppid=9436 vsize=11800 CPUtime=0 cores=5,7
/proc/9438/stat : 9438 (runsolver) S 9436 9438 8809 0 -1 4202560 41 0 0 0 0 0 0 0 24 0 1 0 486684640 12083200 52 33554432000 4194304 5434984 140737443992512 18446744073709551615 4881607 0 2147483391 4096 24578 18446744071699960631 0 0 17 5 0 0 0
/proc/9438/statm: 2950 52 31 303 0 2644 0
[startup+0.065658 s]
/proc/loadavg: 3.82 3.95 3.72 4/189 9438
/proc/meminfo: memFree=12916140/32951124 swapFree=67111528/67111528
[pid=9438] ppid=9436 vsize=23848 CPUtime=0.04 cores=5,7
/proc/9438/stat : 9438 (kw) R 9436 9438 8809 0 -1 4202496 5372 0 0 0 3 1 0 0 25 0 1 0 486684640 24420352 5306 33554432000 4194304 6935321 140736172216976 18446744073709551615 5922283 0 0 4096 2 0 0 0 17 5 0 0 0
/proc/9438/statm: 5962 5306 247 670 0 5283 0
Current children cumulated CPU time (s) 0.04
Current children cumulated vsize (KiB) 23848
[startup+0.100617 s]
/proc/loadavg: 3.82 3.95 3.72 4/189 9438
/proc/meminfo: memFree=12916140/32951124 swapFree=67111528/67111528
[pid=9438] ppid=9436 vsize=25964 CPUtime=0.07 cores=5,7
/proc/9438/stat : 9438 (kw) R 9436 9438 8809 0 -1 4202496 5893 0 0 0 6 1 0 0 25 0 1 0 486684640 26587136 5827 33554432000 4194304 6935321 140736172216976 18446744073709551615 5922283 0 0 4096 2 0 0 0 17 5 0 0 0
/proc/9438/statm: 6491 5827 247 670 0 5812 0
Current children cumulated CPU time (s) 0.07
Current children cumulated vsize (KiB) 25964
[startup+0.30058 s]
/proc/loadavg: 3.82 3.95 3.72 4/189 9438
/proc/meminfo: memFree=12916140/32951124 swapFree=67111528/67111528
[pid=9438] ppid=9436 vsize=36896 CPUtime=0.27 cores=5,7
/proc/9438/stat : 9438 (kw) R 9436 9438 8809 0 -1 4202496 8599 0 0 0 26 1 0 0 25 0 1 0 486684640 37781504 8533 33554432000 4194304 6935321 140736172216976 18446744073709551615 4400964 0 0 4096 2 0 0 0 17 5 0 0 0
/proc/9438/statm: 9224 8533 258 670 0 8545 0
Current children cumulated CPU time (s) 0.27
Current children cumulated vsize (KiB) 36896
[startup+0.70052 s]
/proc/loadavg: 3.82 3.95 3.72 4/189 9438
/proc/meminfo: memFree=12916140/32951124 swapFree=67111528/67111528
[pid=9438] ppid=9436 vsize=51852 CPUtime=0.67 cores=5,7
/proc/9438/stat : 9438 (kw) R 9436 9438 8809 0 -1 4202496 12791 0 0 0 63 4 0 0 25 0 1 0 486684640 53096448 12053 33554432000 4194304 6935321 140736172216976 18446744073709551615 5943595 0 0 4096 2 0 0 0 17 5 0 0 0
/proc/9438/statm: 12963 12053 286 670 0 12284 0
Current children cumulated CPU time (s) 0.67
Current children cumulated vsize (KiB) 51852
[startup+1.50036 s]
/proc/loadavg: 3.84 3.95 3.72 5/190 9439
/proc/meminfo: memFree=12865168/32951124 swapFree=67111528/67111528
[pid=9438] ppid=9436 vsize=51852 CPUtime=1.47 cores=5,7
/proc/9438/stat : 9438 (kw) R 9436 9438 8809 0 -1 4202496 12812 0 0 0 143 4 0 0 25 0 1 0 486684640 53096448 12074 33554432000 4194304 6935321 140736172216976 18446744073709551615 4430607 0 0 4096 2 0 0 0 17 5 0 0 0
/proc/9438/statm: 12963 12074 286 670 0 12284 0
Current children cumulated CPU time (s) 1.47
Current children cumulated vsize (KiB) 51852
[startup+3.10108 s]
/proc/loadavg: 3.84 3.95 3.72 5/190 9439
/proc/meminfo: memFree=12864796/32951124 swapFree=67111528/67111528
[pid=9438] ppid=9436 vsize=51852 CPUtime=3.07 cores=5,7
/proc/9438/stat : 9438 (kw) R 9436 9438 8809 0 -1 4202496 12829 0 0 0 303 4 0 0 25 0 1 0 486684640 53096448 12091 33554432000 4194304 6935321 140736172216976 18446744073709551615 4487394 0 0 4096 2 0 0 0 17 5 0 0 0
/proc/9438/statm: 12963 12091 286 670 0 12284 0
Current children cumulated CPU time (s) 3.07
Current children cumulated vsize (KiB) 51852
[startup+6.30049 s]
/proc/loadavg: 3.84 3.95 3.72 5/190 9439
/proc/meminfo: memFree=12864412/32951124 swapFree=67111528/67111528
[pid=9438] ppid=9436 vsize=52500 CPUtime=6.27 cores=5,7
/proc/9438/stat : 9438 (kw) R 9436 9438 8809 0 -1 4202496 13034 0 0 0 623 4 0 0 25 0 1 0 486684640 53760000 12296 33554432000 4194304 6935321 140736172216976 18446744073709551615 4429796 0 0 4096 2 0 0 0 17 5 0 0 0
/proc/9438/statm: 13125 12296 298 670 0 12446 0
Current children cumulated CPU time (s) 6.27
Current children cumulated vsize (KiB) 52500
[startup+12.7003 s]
/proc/loadavg: 3.86 3.95 3.72 5/190 9439
/proc/meminfo: memFree=12862304/32951124 swapFree=67111528/67111528
[pid=9438] ppid=9436 vsize=52964 CPUtime=12.67 cores=5,7
/proc/9438/stat : 9438 (kw) R 9436 9438 8809 0 -1 4202496 13829 0 0 0 1263 4 0 0 25 0 1 0 486684640 54235136 12440 33554432000 4194304 6935321 140736172216976 18446744073709551615 4431261 0 0 4096 2 0 0 0 17 5 0 0 0
/proc/9438/statm: 13241 12440 298 670 0 12562 0
Current children cumulated CPU time (s) 12.67
Current children cumulated vsize (KiB) 52964
[startup+25.501 s]
/proc/loadavg: 3.88 3.95 3.72 5/191 9441
/proc/meminfo: memFree=12846932/32951124 swapFree=67111528/67111528
[pid=9438] ppid=9436 vsize=56676 CPUtime=25.47 cores=5,7
/proc/9438/stat : 9438 (kw) R 9436 9438 8809 0 -1 4202496 15229 0 0 0 2542 5 0 0 25 0 1 0 486684640 58036224 13369 33554432000 4194304 6935321 140736172216976 18446744073709551615 4430563 0 0 4096 2 0 0 0 17 5 0 0 0
/proc/9438/statm: 14169 13369 298 670 0 13490 0
Current children cumulated CPU time (s) 25.47
Current children cumulated vsize (KiB) 56676
[startup+51.1003 s]
/proc/loadavg: 3.92 3.96 3.73 5/190 9449
/proc/meminfo: memFree=12833988/32951124 swapFree=67111528/67111528
[pid=9438] ppid=9436 vsize=66060 CPUtime=51.07 cores=5,7
/proc/9438/stat : 9438 (kw) R 9436 9438 8809 0 -1 4202496 18005 0 0 0 5101 6 0 0 25 0 1 0 486684640 67645440 15643 33554432000 4194304 6935321 140736172216976 18446744073709551615 4487176 0 0 4096 2 0 0 0 17 5 0 0 0
/proc/9438/statm: 16515 15643 298 670 0 15836 0
Current children cumulated CPU time (s) 51.07
Current children cumulated vsize (KiB) 66060
[startup+102.307 s]
/proc/loadavg: 4.03 3.98 3.75 5/190 9451
/proc/meminfo: memFree=12821500/32951124 swapFree=67111528/67111528
[pid=9438] ppid=9436 vsize=70000 CPUtime=102.27 cores=5,7
/proc/9438/stat : 9438 (kw) R 9436 9438 8809 0 -1 4202496 19010 0 0 0 10220 7 0 0 25 0 1 0 486684640 71680000 16648 33554432000 4194304 6935321 140736172216976 18446744073709551615 4430636 0 0 4096 2 0 0 0 17 5 0 0 0
/proc/9438/statm: 17500 16648 298 670 0 16821 0
Current children cumulated CPU time (s) 102.27
Current children cumulated vsize (KiB) 70000
[startup+162.301 s]
/proc/loadavg: 4.01 3.98 3.76 5/190 9452
/proc/meminfo: memFree=12810460/32951124 swapFree=67111528/67111528
[pid=9438] ppid=9436 vsize=74840 CPUtime=162.27 cores=5,7
/proc/9438/stat : 9438 (kw) R 9436 9438 8809 0 -1 4202496 20071 0 0 0 16218 9 0 0 25 0 1 0 486684640 76636160 17709 33554432000 4194304 6935321 140736172216976 18446744073709551615 4720391 0 0 4096 2 0 0 0 17 5 0 0 0
/proc/9438/statm: 18710 17709 298 670 0 18031 0
Current children cumulated CPU time (s) 162.27
Current children cumulated vsize (KiB) 74840
[startup+222.301 s]
/proc/loadavg: 4.05 3.99 3.77 5/190 9484
/proc/meminfo: memFree=12806676/32951124 swapFree=67111528/67111528
[pid=9438] ppid=9436 vsize=83008 CPUtime=222.28 cores=5,7
/proc/9438/stat : 9438 (kw) R 9436 9438 8809 0 -1 4202496 22017 0 0 0 22217 11 0 0 25 0 1 0 486684640 85000192 19655 33554432000 4194304 6935321 140736172216976 18446744073709551615 4430563 0 0 4096 2 0 0 0 17 5 0 0 0
/proc/9438/statm: 20752 19655 298 670 0 20073 0
Current children cumulated CPU time (s) 222.28
Current children cumulated vsize (KiB) 83008
Solver just ended. Dumping a history of the last processes samples
[startup+223.901 s]
/proc/loadavg: 4.05 3.99 3.77 5/190 9484
/proc/meminfo: memFree=12806540/32951124 swapFree=67111528/67111528
[pid=9438] ppid=9436 vsize=81972 CPUtime=223.88 cores=5,7
/proc/9438/stat : 9438 (kw) R 9436 9438 8809 0 -1 4202496 22322 0 0 0 22377 11 0 0 25 0 1 0 486684640 83939328 19422 33554432000 4194304 6935321 140736172216976 18446744073709551615 4497824 0 0 4096 2 0 0 0 17 5 0 0 0
/proc/9438/statm: 20493 19422 298 670 0 19814 0
Current children cumulated CPU time (s) 223.88
Current children cumulated vsize (KiB) 81972
[startup+224.301 s]
/proc/loadavg: 4.05 3.99 3.77 5/190 9484
/proc/meminfo: memFree=12806064/32951124 swapFree=67111528/67111528
[pid=9438] ppid=9436 vsize=82332 CPUtime=224.28 cores=5,7
/proc/9438/stat : 9438 (kw) R 9436 9438 8809 0 -1 4202496 22363 0 0 0 22417 11 0 0 25 0 1 0 486684640 84307968 19463 33554432000 4194304 6935321 140736172216976 18446744073709551615 4430629 0 0 4096 2 0 0 0 17 5 0 0 0
/proc/9438/statm: 20583 19463 298 670 0 19904 0
Current children cumulated CPU time (s) 224.28
Current children cumulated vsize (KiB) 82332
[startup+224.501 s]
/proc/loadavg: 4.05 3.99 3.77 5/190 9484
/proc/meminfo: memFree=12806064/32951124 swapFree=67111528/67111528
[pid=9438] ppid=9436 vsize=82332 CPUtime=224.48 cores=5,7
/proc/9438/stat : 9438 (kw) R 9436 9438 8809 0 -1 4202496 22366 0 0 0 22437 11 0 0 25 0 1 0 486684640 84307968 19466 33554432000 4194304 6935321 140736172216976 18446744073709551615 4430633 0 0 4096 2 0 0 0 17 5 0 0 0
/proc/9438/statm: 20583 19466 298 670 0 19904 0
Current children cumulated CPU time (s) 224.48
Current children cumulated vsize (KiB) 82332
[startup+224.601 s]
/proc/loadavg: 4.05 3.99 3.77 5/190 9484
/proc/meminfo: memFree=12806064/32951124 swapFree=67111528/67111528
[pid=9438] ppid=9436 vsize=82332 CPUtime=224.58 cores=5,7
/proc/9438/stat : 9438 (kw) R 9436 9438 8809 0 -1 4202496 22378 0 0 0 22447 11 0 0 25 0 1 0 486684640 84307968 19478 33554432000 4194304 6935321 140736172216976 18446744073709551615 4431226 0 0 4096 2 0 0 0 17 5 0 0 0
/proc/9438/statm: 20583 19478 298 670 0 19904 0
Current children cumulated CPU time (s) 224.58
Current children cumulated vsize (KiB) 82332
Child status: 20
Real time (s): 224.689
CPU time (s): 224.672
CPU user time (s): 224.555
CPU system time (s): 0.116982
CPU usage (%): 99.9923
Max. virtual memory (cumulated for all children) (KiB): 84136
getrusage(RUSAGE_CHILDREN,...) data:
user time used= 224.555
system time used= 0.116982
maximum resident set size= 0
integral shared memory size= 0
integral unshared data size= 0
integral unshared stack size= 0
page reclaims= 22389
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= 398
runsolver used 0.342947 second user time and 0.887865 second system time
The end
Begin job on node104 at 2011-04-25 19:00:42
IDJOB=3281173
IDBENCH=20529
IDSOLVER=1658
FILE ID=node104/3281173-1303750842
RUNJOBID= node104-1303750807-9371
PBS_JOBID= 13154058
Free space on /tmp= 71364 MiB
SOLVER NAME= kw 2011-02-28
BENCH NAME= SAT07/industrial/IBM_FV_2002_13_rule_1/SAT_dat.k20.cnf
COMMAND LINE= kw --tmp-path=TMPDIR BENCHNAME
RUNSOLVER COMMAND LINE= BIN/runsolver --timestamp -w /tmp/evaluation-result-3281173-1303750842/watcher-3281173-1303750842 -o /tmp/evaluation-result-3281173-1303750842/solver-3281173-1303750842 -C 2400 -W 1300 -M 7680 kw --tmp-path=HOME HOME/instance-3281173-1303750842.cnf
TIME LIMIT= 2400 seconds
MEMORY LIMIT= 7680 MiB
NBCORE= 2
MD5SUM BENCH= 2bee695ce4278b72ee9295631ad94252
RANDOM SEED=1524146532
node104.alineos.net Linux 2.6.18-164.el5 #1 SMP Thu Sep 3 03:28:30 EDT 2009
/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 : 2666.855
cache size : 8192 KB
physical id : 0
siblings : 4
core id : 0
cpu cores : 4
apicid : 0
fpu : yes
fpu_exception : yes
cpuid level : 11
wp : yes
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 nx rdtscp lm constant_tsc ida nonstop_tsc pni monitor ds_cpl vmx est tm2 cx16 xtpr popcnt lahf_lm
bogomips : 5333.71
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management: [8]
processor : 1
vendor_id : GenuineIntel
cpu family : 6
model : 26
model name : Intel(R) Xeon(R) CPU X5550 @ 2.67GHz
stepping : 5
cpu MHz : 2666.855
cache size : 8192 KB
physical id : 1
siblings : 4
core id : 0
cpu cores : 4
apicid : 16
fpu : yes
fpu_exception : yes
cpuid level : 11
wp : yes
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 nx rdtscp lm constant_tsc ida nonstop_tsc pni monitor ds_cpl vmx est tm2 cx16 xtpr popcnt lahf_lm
bogomips : 5332.83
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management: [8]
processor : 2
vendor_id : GenuineIntel
cpu family : 6
model : 26
model name : Intel(R) Xeon(R) CPU X5550 @ 2.67GHz
stepping : 5
cpu MHz : 2666.855
cache size : 8192 KB
physical id : 0
siblings : 4
core id : 1
cpu cores : 4
apicid : 2
fpu : yes
fpu_exception : yes
cpuid level : 11
wp : yes
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 nx rdtscp lm constant_tsc ida nonstop_tsc pni monitor ds_cpl vmx est tm2 cx16 xtpr popcnt lahf_lm
bogomips : 5332.67
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management: [8]
processor : 3
vendor_id : GenuineIntel
cpu family : 6
model : 26
model name : Intel(R) Xeon(R) CPU X5550 @ 2.67GHz
stepping : 5
cpu MHz : 2666.855
cache size : 8192 KB
physical id : 1
siblings : 4
core id : 1
cpu cores : 4
apicid : 18
fpu : yes
fpu_exception : yes
cpuid level : 11
wp : yes
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 nx rdtscp lm constant_tsc ida nonstop_tsc pni monitor ds_cpl vmx est tm2 cx16 xtpr popcnt lahf_lm
bogomips : 5332.80
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management: [8]
processor : 4
vendor_id : GenuineIntel
cpu family : 6
model : 26
model name : Intel(R) Xeon(R) CPU X5550 @ 2.67GHz
stepping : 5
cpu MHz : 2666.855
cache size : 8192 KB
physical id : 0
siblings : 4
core id : 2
cpu cores : 4
apicid : 4
fpu : yes
fpu_exception : yes
cpuid level : 11
wp : yes
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 nx rdtscp lm constant_tsc ida nonstop_tsc pni monitor ds_cpl vmx est tm2 cx16 xtpr popcnt lahf_lm
bogomips : 5293.18
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management: [8]
processor : 5
vendor_id : GenuineIntel
cpu family : 6
model : 26
model name : Intel(R) Xeon(R) CPU X5550 @ 2.67GHz
stepping : 5
cpu MHz : 2666.855
cache size : 8192 KB
physical id : 1
siblings : 4
core id : 2
cpu cores : 4
apicid : 20
fpu : yes
fpu_exception : yes
cpuid level : 11
wp : yes
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 nx rdtscp lm constant_tsc ida nonstop_tsc pni monitor ds_cpl vmx est tm2 cx16 xtpr popcnt lahf_lm
bogomips : 5332.83
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management: [8]
processor : 6
vendor_id : GenuineIntel
cpu family : 6
model : 26
model name : Intel(R) Xeon(R) CPU X5550 @ 2.67GHz
stepping : 5
cpu MHz : 2666.855
cache size : 8192 KB
physical id : 0
siblings : 4
core id : 3
cpu cores : 4
apicid : 6
fpu : yes
fpu_exception : yes
cpuid level : 11
wp : yes
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 nx rdtscp lm constant_tsc ida nonstop_tsc pni monitor ds_cpl vmx est tm2 cx16 xtpr popcnt lahf_lm
bogomips : 5332.75
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management: [8]
processor : 7
vendor_id : GenuineIntel
cpu family : 6
model : 26
model name : Intel(R) Xeon(R) CPU X5550 @ 2.67GHz
stepping : 5
cpu MHz : 2666.855
cache size : 8192 KB
physical id : 1
siblings : 4
core id : 3
cpu cores : 4
apicid : 22
fpu : yes
fpu_exception : yes
cpuid level : 11
wp : yes
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 nx rdtscp lm constant_tsc ida nonstop_tsc pni monitor ds_cpl vmx est tm2 cx16 xtpr popcnt lahf_lm
bogomips : 5332.82
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management: [8]
/proc/meminfo:
MemTotal: 32951124 kB
MemFree: 12916420 kB
Buffers: 2282584 kB
Cached: 16904308 kB
SwapCached: 0 kB
Active: 10916468 kB
Inactive: 8536080 kB
HighTotal: 0 kB
HighFree: 0 kB
LowTotal: 32951124 kB
LowFree: 12916420 kB
SwapTotal: 67111528 kB
SwapFree: 67111528 kB
Dirty: 30128 kB
Writeback: 0 kB
AnonPages: 265076 kB
Mapped: 18676 kB
Slab: 516648 kB
PageTables: 5320 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
CommitLimit: 83587088 kB
Committed_AS: 463192 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 296008 kB
VmallocChunk: 34359440975 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
Hugepagesize: 2048 kB
Free space on /tmp at the end= 71356 MiB
End job on node104 at 2011-04-25 19:04:27