[ltt-dev] lttv unable to execute textDump on MIPS multicore target

[Mathieu Desnoyers]

* Naresh Bhat (nareshgbhat at gmail.com) wrote:
> Hi Mathieu/David,
> 
> Thank you very much. The patch is applied without any issues. But facing the
> linking errors. Is there any configuration missing in Kconfig ?

Can you send me your updated .config ?

Thanks,

Mathieu

> *
> Thanks and Regards
> -Naresh Bhat*
> *
> Linking error log:*
> 
> ========================================================================================================
> ..................
> ......................
> ..............................
> AR      arch/mips/lib/lib.a
>   LD      vmlinux.o
>   MODPOST vmlinux.o
>   GEN     .version
>   CHK     include/linux/compile.h
>   UPD     include/linux/compile.h
>   CC      init/version.o
>   LD      init/built-in.o
>   LD      .tmp_vmlinux1
> ltt/built-in.o: In function `ltt_trace_destroy':
> (.text.ltt_trace_destroy+0x6c): undefined reference to `put_synthetic_tsc'
> ltt/built-in.o: In function `ltt_trace_alloc':
> (.text.ltt_trace_alloc+0x5c): undefined reference to `get_synthetic_tsc'
> ltt/built-in.o: In function `ltt_trace_alloc':
> (.text.ltt_trace_alloc+0x164): undefined reference to
> `trace_clock_read_synthetic_tsc'
> ltt/built-in.o: In function `ltt_trace_alloc':
> (.text.ltt_trace_alloc+0x454): undefined reference to `put_synthetic_tsc'
> ltt/built-in.o: In function `ltt_trace_alloc':
> (.text.ltt_trace_alloc+0x4b4): undefined reference to `put_synthetic_tsc'
> ltt/built-in.o: In function `ltt_trace_alloc':
> (.text.ltt_trace_alloc+0x4f8): undefined reference to `put_synthetic_tsc'
> ltt/built-in.o: In function `ltt_reserve_slot_lockless_slow':
> (.text.ltt_reserve_slot_lockless_slow+0xa8): undefined reference to
> `trace_clock_read_synthetic_tsc'
> ltt/built-in.o: In function `ltt_force_switch_lockless_slow':
> (.text.ltt_force_switch_lockless_slow+0x44): undefined reference to
> `trace_clock_read_synthetic_tsc'
> ltt/built-in.o: In function `_ltt_specialized_trace':
> (.text._ltt_specialized_trace+0x1cc): undefined reference to
> `trace_clock_read_synthetic_tsc'
> make: *** [.tmp_vmlinux1] Error 1
> #
> ==============================================================================================
> ===
> 
> 
> On Tue, Feb 15, 2011 at 9:02 AM, Mathieu Desnoyers <
> compudj at krystal.dyndns.org> wrote:
> 
> > Is the following patch less confusing ?
> >
> >
> > MIPS: octeon fix get_cycles
> >
> > Make sure get_cycles(), used by kernel/time/tsc-sync.c TSC synchronicity
> > checker, works fine on octeon by using the full 64-bits.
> >
> > Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers at efficios.com>
> > ---
> >  arch/mips/Kconfig             |   11 +++++++++--
> >  arch/mips/include/asm/timex.h |   31 ++++++++++++++++++++++++++++++-
> >  2 files changed, 39 insertions(+), 3 deletions(-)
> >
> > Index: linux-2.6-lttng/arch/mips/Kconfig
> > ===================================================================
> > --- linux-2.6-lttng.orig/arch/mips/Kconfig
> > +++ linux-2.6-lttng/arch/mips/Kconfig
> > @@ -1949,9 +1949,16 @@ config CPU_R4400_WORKAROUNDS
> >  config HAVE_GET_CYCLES_32
> >         def_bool y
> >         depends on !CPU_R4400_WORKAROUNDS
> > +       depends on !CPU_CAVIUM_OCTEON
> >        select HAVE_TRACE_CLOCK
> > -       select HAVE_TRACE_CLOCK_32_TO_64 if (!CPU_CAVIUM_OCTEON)
> > -       select HAVE_UNSYNCHRONIZED_TSC if (!CPU_CAVIUM_OCTEON)
> > +       select HAVE_TRACE_CLOCK_32_TO_64
> > +       select HAVE_UNSYNCHRONIZED_TSC
> > +
> > +config HAVE_GET_CYCLES
> > +       def_bool y
> > +       depends on CPU_CAVIUM_OCTEON
> > +       select HAVE_TRACE_CLOCK
> > +       select HAVE_UNSYNCHRONIZED_TSC
> >
> >  #
> >  # - Highmem only makes sense for the 32-bit kernel.
> > Index: linux-2.6-lttng/arch/mips/include/asm/timex.h
> > ===================================================================
> > --- linux-2.6-lttng.orig/arch/mips/include/asm/timex.h
> > +++ linux-2.6-lttng/arch/mips/include/asm/timex.h
> > @@ -42,9 +42,36 @@ extern unsigned int mips_hpt_frequency;
> >   * will result in the timer interrupt getting lost.
> >  */
> >
> > +#ifdef CONFIG_HAVE_GET_CYCLES
> > +# ifdef CONFIG_CPU_CAVIUM_OCTEON
> > +typedef unsigned int cycles_t;
> > +
> > +static inline cycles_t get_cycles(void)
> > +{
> > +       return read_c0_cvmcount();
> > +}
> > +
> > +static inline void get_cycles_barrier(void)
> > +{
> > +}
> > +
> > +static inline cycles_t get_cycles_rate(void)
> > +{
> > +       return mips_hpt_frequency;
> > +}
> > +
> > +extern int test_tsc_synchronization(void);
> > +extern int _tsc_is_sync;
> > +static inline int tsc_is_sync(void)
> > +{
> > +       return _tsc_is_sync;
> > +}
> > +# else /* #ifdef CONFIG_CPU_CAVIUM_OCTEON */
> > +#  error "64-bit get_cycles() supported only on Cavium Octeon MIPS
> > architectures"
> > +# endif /* #else #ifdef CONFIG_CPU_CAVIUM_OCTEON */
> > +#elif defined(CONFIG_HAVE_GET_CYCLES_32)
> >  typedef unsigned int cycles_t;
> >
> > -#ifdef CONFIG_HAVE_GET_CYCLES_32
> >  static inline cycles_t get_cycles(void)
> >  {
> >         return read_c0_count();
> > @@ -66,6 +93,8 @@ static inline int tsc_is_sync(void)
> >         return _tsc_is_sync;
> >  }
> >  #else
> > +typedef unsigned int cycles_t;
> > +
> >  static inline cycles_t get_cycles(void)
> >  {
> >         return 0;
> > --
> > Mathieu Desnoyers
> > Operating System Efficiency R&D Consultant
> > EfficiOS Inc.
> > http://www.efficios.com
> >

-- 
Mathieu Desnoyers
Operating System Efficiency R&D Consultant
EfficiOS Inc.
http://www.efficios.com