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That's odd - here are my results:
sb@hathor:~$ /usr/bin/time taskset 1 perl -e '$s+=$_ for 1 .. 5e6'
0.61user 0.00system 0:00.62elapsed 98%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+621minor)pagefaults 0swaps
sb@hathor:~$ /usr/bin/time taskset 2 perl -e '$s+=$_ for 1 .. 5e6'
0.61user 0.00system 0:00.62elapsed 100%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+622minor)pagefaults 0swaps
sb@hathor:~$ cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : Intel(R) Pentium(R) Dual CPU T3200 @ 2.00GHz
stepping : 13
cpu MHz : 1000.000
cache size : 1024 KB
physical id : 0
siblings : 2
core id : 0
cpu cores : 2
apicid : 0
initial apicid : 0
fpu : yes
fpu_exception : yes
cpuid level : 10
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 pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good nopl pni monitor ds_cpl est tm2 ssse3 cx16 xtpr lahf_lm
bogomips : 3989.99
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:
processor : 1
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : Intel(R) Pentium(R) Dual CPU T3200 @ 2.00GHz
stepping : 13
cpu MHz : 1000.000
cache size : 1024 KB
physical id : 0
siblings : 2
core id : 1
cpu cores : 2
apicid : 1
initial apicid : 1
fpu : yes
fpu_exception : yes
cpuid level : 10
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 pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good nopl pni monitor ds_cpl est tm2 ssse3 cx16 xtpr lahf_lm
bogomips : 3990.02
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:
What machine's this on, and what distro?
--
simon
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