Hi, Can anyone help me with this?
Thanks, Thomas On Tue, Sep 21, 2010 at 8:58 AM, Thomas De Schampheleire <patrickdepinguin+q...@gmail.com> wrote: > Hi, > > I am running an x86 based Linux system under qemu. Linux boots up > correctly in most cases, however sometimes the PMTIMER fails to > calibrate correctly: > > [ 0.000000] Fast TSC calibration failed > [ 0.000000] TSC: Unable to calibrate against PIT > [ 0.000000] TSC: HPET/PMTIMER calibration failed. > [ 0.000000] Marking TSC unstable due to could not calculate TSC khz > [ 0.010998] Calibrating delay loop... 1011.71 BogoMIPS (lpj=505856) > > while the following messages appears in a good situation: > > [ 0.000000] Fast TSC calibration failed > [ 0.000000] TSC: Unable to calibrate against PIT > [ 0.000000] TSC: using PMTIMER reference calibration > [ 0.000000] Detected 2258.151 MHz processor. > [ 0.009099] Calibrating delay loop (skipped), value calculated > using timer frequency.. 4516.30 BogoMIPS (lpj=2258151) > > HPET is deliberately disabled. > > Both situations occur with the same Linux kernel configuration, so I > am assuming this is a qemu problem. > I have the impression that in a bad situation, the boot messages > scroll by slower, indicating a slower emulation than in the good case > (as the timings seen by the kernel are approximately the same). > > Please find in attachment the full boot log of a good and bad > situation, plus the kernel configuration. > > Have you seen this problem before? Do you have any idea how to fix it? > > Thanks, > Thomas >
