Time::HiRes VERSION:1.9711 Linux 2.6.28-14-generic #47-Ubuntu SMP Sat Jul 25 00:28:35 UTC 2009 i686 GNU/Linux usleep (usec) (requested == actual) 1000 == 1436 2000 == 2226 3000 == 3225 4000 == 4082 5000 == 5226 6000 == 6221 7000 == 9144 8000 == 9127 9000 == 9227 10000 == 11638 11000 == 11227 12000 == 18495 13000 == 13224 14000 == 14069 15000 == 15223 16000 == 16073 17000 == 17225 18000 == 18072 19000 == 19070 20000 == 20226 21000 == 21227 22000 == 22069 23000 == 23222 24000 == 24084 25000 == 25083 26000 == 26223 27000 == 27167 28000 == 28068 29000 == 29224 30000 == 30073 31000 == 31077 32000 == 32074 33000 == 33220 34000 == 34225 35000 == 35085 36000 == 36225 37000 == 37228 38000 == 38228 39000 == 39223 40000 == 40088 sleep (sec) (requested == actual) 0.001 == 0.001225 0.002 == 0.002222 0.003 == 0.003222 0.004 == 0.00408 0.005 == 0.005068 0.006 == 0.006223 0.007 == 0.007223 0.008 == 0.008224 0.009 == 0.009068 0.01 == 0.010072 0.011 == 0.011227 0.012 == 0.012221 0.013 == 0.013085 0.014 == 0.014068 0.015 == 0.015226 0.016 == 0.01607 0.017 == 0.017228 0.018 == 0.018068 0.019 == 0.019071 0.02 == 0.020131 0.021 == 0.021224 0.022 == 0.02207 0.023 == 0.023227 0.024 == 0.024224 0.025 == 0.025222 0.026 == 0.026222 0.027 == 0.027229 0.028 == 0.028222 0.029 == 0.029228 0.03 == 0.030141 0.031 == 0.031086 0.032 == 0.032225 0.033 == 0.033235 0.034 == 0.034084 0.035 == 0.035135 0.036 == 0.036226 0.037 == 0.037088 0.038 == 0.038074 0.039 == 0.039073 0.04 == 0.040068