[lttv] LTTng 0.6.79 should fix unsync TSCs issues on AMD64

Hi,

By providing my own version of "monotonic_clock" for x86_64, which uses
the monotonic time of the kernel, I hope to fix the TSC skews seen on
AMD64 boxes with async TSC frequencies. Some testing is welcome. It is
new to LTTng 0.6.79 (don't forget to upgrade the other packages as
well).

Mathieu


* M. Scott Doerrie (mdoerri-vD/[email protected]) wrote:
> I'm sorry, I may have misunderstood your previous request or this 
> response. The config file I mailed to you is the successful config file, 
> with frequency scaling enabled but SMP disabled. It does not produce any 
> LTTV errors. Did you want me to send one of the broken configs with SMP 
> on and CPU scaling on or off? Or are you telling me that disabling all 
> of these options will allow me to enable SMP support? I am no longer 
> looking for a fix to this issue since I am willing to run without SMP 
> support. I believe there might be an SMP issue either in LTTV or LTT.
> 
> Scott Doerrie
> 
> Mathieu Desnoyers wrote:
> >* M. Scott Doerrie (mdoerri-vD/[email protected]) wrote:
> >  
> >>My config file is attached.
> >>
> >>    
> >
> >Starting here, set all of these to n
> >  
> >># Power management options (ACPI, APM)
> >>#
> >>CONFIG_PM=y
> >>CONFIG_PM_LEGACY=y
> >># CONFIG_PM_DEBUG is not set
> >>
> >>#
> >># ACPI (Advanced Configuration and Power Interface) Support
> >>#
> >>CONFIG_ACPI=y
> >>CONFIG_ACPI_SLEEP=y
> >>CONFIG_ACPI_SLEEP_PROC_FS=y
> >># CONFIG_ACPI_SLEEP_PROC_SLEEP is not set
> >>CONFIG_ACPI_AC=m
> >>CONFIG_ACPI_BATTERY=m
> >>CONFIG_ACPI_BUTTON=m
> >>CONFIG_ACPI_VIDEO=m
> >># CONFIG_ACPI_HOTKEY is not set
> >>CONFIG_ACPI_FAN=y
> >>CONFIG_ACPI_DOCK=m
> >>CONFIG_ACPI_PROCESSOR=y
> >>CONFIG_ACPI_THERMAL=y
> >>CONFIG_ACPI_ASUS=m
> >>CONFIG_ACPI_IBM=m
> >>CONFIG_ACPI_TOSHIBA=m
> >>CONFIG_ACPI_BLACKLIST_YEAR=1999
> >># CONFIG_ACPI_DEBUG is not set
> >>CONFIG_ACPI_EC=y
> >>CONFIG_ACPI_POWER=y
> >>CONFIG_ACPI_SYSTEM=y
> >>CONFIG_X86_PM_TIMER=y
> >>CONFIG_ACPI_CONTAINER=y
> >>CONFIG_ACPI_SBS=m
> >>
> >>#
> >># APM (Advanced Power Management) BIOS Support
> >>#
> >>CONFIG_APM=y
> >># CONFIG_APM_IGNORE_USER_SUSPEND is not set
> >># CONFIG_APM_DO_ENABLE is not set
> >>CONFIG_APM_CPU_IDLE=y
> >># CONFIG_APM_DISPLAY_BLANK is not set
> >>CONFIG_APM_RTC_IS_GMT=y
> >># CONFIG_APM_ALLOW_INTS is not set
> >># CONFIG_APM_REAL_MODE_POWER_OFF is not set
> >>
> >>#
> >># CPU Frequency scaling
> >>#
> >>CONFIG_CPU_FREQ=y
> >>CONFIG_CPU_FREQ_TABLE=y
> >>CONFIG_CPU_FREQ_DEBUG=y
> >>CONFIG_CPU_FREQ_STAT=m
> >>CONFIG_CPU_FREQ_STAT_DETAILS=y
> >># CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE is not set
> >>CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE=y
> >>CONFIG_CPU_FREQ_GOV_PERFORMANCE=y
> >>CONFIG_CPU_FREQ_GOV_POWERSAVE=m
> >>CONFIG_CPU_FREQ_GOV_USERSPACE=y
> >>CONFIG_CPU_FREQ_GOV_ONDEMAND=m
> >>CONFIG_CPU_FREQ_GOV_CONSERVATIVE=m
> >>
> >>#
> >># CPUFreq processor drivers
> >>#
> >>CONFIG_X86_ACPI_CPUFREQ=m
> >># CONFIG_X86_POWERNOW_K6 is not set
> >>CONFIG_X86_POWERNOW_K7=y
> >>CONFIG_X86_POWERNOW_K7_ACPI=y
> >>CONFIG_X86_POWERNOW_K8=y
> >>CONFIG_X86_POWERNOW_K8_ACPI=y
> >># CONFIG_X86_GX_SUSPMOD is not set
> >>CONFIG_X86_SPEEDSTEP_CENTRINO=y
> >>CONFIG_X86_SPEEDSTEP_CENTRINO_ACPI=y
> >>CONFIG_X86_SPEEDSTEP_CENTRINO_TABLE=y
> >>CONFIG_X86_SPEEDSTEP_ICH=y
> >>CONFIG_X86_SPEEDSTEP_SMI=y
> >>CONFIG_X86_P4_CLOCKMOD=m
> >># CONFIG_X86_CPUFREQ_NFORCE2 is not set
> >>CONFIG_X86_LONGRUN=y
> >># CONFIG_X86_LONGHAUL is not set
> >>
> >>    
> >
> >It could help.
> >
> >Otherwise, I guess you may have to go in your BIOS and disable the power
> >management.
> >
> >Mathieu
> >
> >  
> 

-- 
Mathieu Desnoyers
Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F  BA06 3F25 A8FE 3BAE 9A68