Time::HiRes VERSION:1.86 Linux 2.6.18-128.el5 #1 SMP Wed Dec 17 11:42:39 EST 2008 i686 i686 i386 GNU/Linux usleep (usec) (requested == actual) 1000 == 2243 2000 == 3986 3000 == 5084 4000 == 6079 5000 == 7061 6000 == 8095 7000 == 8065 8000 == 9099 9000 == 11196 10000 == 12173 11000 == 13164 12000 == 13178 13000 == 15244 14000 == 16221 15000 == 16239 16000 == 18301 17000 == 18264 18000 == 19301 19000 == 21409 20000 == 21276 21000 == 23483 22000 == 23463 23000 == 25524 24000 == 25503 25000 == 26544 26000 == 27564 27000 == 28544 28000 == 29604 29000 == 30605 30000 == 31645 31000 == 32686 32000 == 33685 33000 == 34673 34000 == 36747 35000 == 36767 36000 == 37765 37000 == 38767 38000 == 39814 39000 == 40847 40000 == 41845 sleep (sec) (requested == actual) 0.001 == 0.001992 0.002 == 0.003027 0.003 == 0.004057 0.004 == 0.005097 0.005 == 0.007138 0.006 == 0.008178 0.007 == 0.009178 0.008 == 0.009158 0.009 == 0.010199 0.01 == 0.012217 0.011 == 0.013259 0.012 == 0.013238 0.013 == 0.014279 0.014 == 0.016339 0.015 == 0.0163 0.016 == 0.01734 0.017 == 0.019401 0.018 == 0.019366 0.019 == 0.021463 0.02 == 0.0214 0.021 == 0.022482 0.022 == 0.02344 0.023 == 0.024522 0.024 == 0.02548 0.025 == 0.026582 0.026 == 0.02754 0.027 == 0.029605 0.028 == 0.029598 0.029 == 0.030589 0.03 == 0.032663 0.031 == 0.032684 0.032 == 0.033662 0.033 == 0.034703 0.034 == 0.035723 0.035 == 0.036743 0.036 == 0.03774 0.037 == 0.038783 0.038 == 0.039802 0.039 == 0.040824 0.04 == 0.041844 # rpm -qa | grep glibc glibc-2.5-34 glibc-common-2.5-34 glibc-devel-2.5-34 glibc-headers-2.5-34