Re: Unable to profile on quad-core Opterons

[Robert R. <rob...@am...>]

I tried the test below also on kernel v2.6.27-rc7/oprofile 0.9.4 with
similiar results. Please try this. And don't miss to send me your
kernel config.

-Robert

On 23.09.08 20:05:36, Niraj Tolia wrote:
> On Tue, Sep 23, 2008 at 7:42 PM, Robert Richter <rob...@am...> wrote:
> > What tells /var/lib/oprofile/samples/oprofiled.log?
> >
> 
> Nothing much. It's along the lines of the following. I can also try a
> different kernel version if you think it would work.
> 
> 
> Tue Sep 23 20:00:05 2008
> 
> Nr. sample dumps: 1
> Nr. non-backtrace samples: 0
> Nr. kernel samples: 0
> Nr. lost samples (no kernel/user): 0
> Nr. lost kernel samples: 0
> Nr. incomplete code structs: 0
> Nr. samples lost due to sample file open failure: 0
> Nr. samples lost due to no permanent mapping: 0
> Nr. event lost due to buffer overflow: 0
> Nr. samples lost due to no mapping: 0
> Nr. backtraces skipped due to no file mapping: 0
> Nr. samples lost due to no mm: 0
> Nr. samples lost cpu buffer overflow: 0
> Nr. samples received: 0
> Nr. backtrace aborted: 0
> Nr. samples lost invalid pc: 0
> 
> 
> Cheers,
> Niraj
> 
> > -Robert
> >
> > On 24.09.08 04:38:40, Robert Richter wrote:
> >> On 23.09.08 19:32:07, Niraj Tolia wrote:
> >> > On Tue, Sep 23, 2008 at 6:53 PM, Robert Richter <rob...@am...> wrote:
> >> > > Niraj,
> >> > >
> >> > > take a look at this directory where the raw sample data is in:
> >> > >
> >> > > # find /var/lib/oprofile/samples/current/
> >> > > ...
> >> > >
> >> >
> >> > Hi Robert,
> >> >
> >> > I had looked into that directory earlier too but it always remains empty.
> >> >
> >> > > Try also to reboot the kernel with the 'nosmp' boot parameter, that
> >> > > start single core kernel.
> >> > >
> >> > > # cat /proc/cmdline
> >> > > console=ttyS0,115200 root=/dev/sda5 nosmp
> >> > >
> >> >
> >> > Unfortunately, this didn't make a difference either.
> >>
> >> Hmm, I will give 2.6.26.5 a try, but I probably not before
> >> tomorrow. Could you send me your configuration.
> >>
> >> -Robert
> >>
> >> >
> >> > Niraj
> >> >
> >> > > -Robert
> >> > >
> >> > > On 23.09.08 18:01:26, Niraj Tolia wrote:
> >> > >> Hi Robert,
> >> > >>
> >> > >> I ran the exact sequence of operations and I don't get any output from
> >> > >> opreport. The only output difference (apart from pid) is included
> >> > >> below. Please let me know if I can help with any other information.
> >> > >> FYI, this is a quad-socket quad-core machine but I doubt that really
> >> > >> makes a difference.
> >> > >>
> >> > >>
> >> > >> # opcontrol --deinit > /dev/null
> >> > >> Unloading oprofile module
> >> > >>
> >> > >> ...
> >> > >>
> >> > >> # opcontrol --deinit
> >> > >> Stopping profiling.
> >> > >> Killing daemon.
> >> > >> Unloading oprofile module
> >> > >> # opreport
> >> > >> opreport error: No sample file found: try running opcontrol --dump
> >> > >> or specify a session containing sample files
> >> > >>
> >> > >>
> >> > >> Cheers,
> >> > >> Niraj
> >> > >>
> >> > >>
> >> > >>
> >> > >> On Tue, Sep 23, 2008 at 5:46 PM, Robert Richter <rob...@am...> wrote:
> >> > >> > Niraj,
> >> > >> >
> >> > >> > could you run the following session, this is that I got:
> >> > >> >
> >> > >> > # opcontrol --deinit > /dev/null
> >> > >> > # rm -f /root/.oprofile/daemonrc
> >> > >> > # opcontrol --no-vmlinux
> >> > >> > # opcontrol --reset
> >> > >> > # opcontrol --init
> >> > >> > # opcontrol --start
> >> > >> > Using default event: CPU_CLK_UNHALTED:100000:0:1:1
> >> > >> > Using 2.6+ OProfile kernel interface.
> >> > >> > Using log file /var/lib/oprofile/samples/oprofiled.log
> >> > >> > Daemon started.
> >> > >> > Profiler running.
> >> > >> > # opcontrol --status
> >> > >> > Daemon running: pid 15515
> >> > >> > Separate options: none
> >> > >> > vmlinux file: none
> >> > >> > Image filter: none
> >> > >> > Call-graph depth: 0
> >> > >> > # perl -e 'for ($i = 0; $i < 10000000; $i++) {;}'
> >> > >> > # opcontrol --deinit
> >> > >> > Stopping profiling.
> >> > >> > Killing daemon.
> >> > >> > # opreport
> >> > >> > CPU: AMD64 family10, speed 2100 MHz (estimated)
> >> > >> > Counted CPU_CLK_UNHALTED events (Cycles outside of halt state) with a unit mask of 0x00 (No unit mask) count 100000
> >> > >> > CPU_CLK_UNHALT...|
> >> > >> >  samples|      %|
> >> > >> > ------------------
> >> > >> >    37829 60.2968 perl5.8.8
> >> > >> >    23859 38.0296 no-vmlinux
> >> > >> >      531  0.8464 libc-2.6.1.so
> >> > >> >      235  0.3746 bash
> >> > >> >      126  0.2008 oprofiled
> >> > >> >      117  0.1865 ld-2.6.1.so
> >> > >> >       12  0.0191 gawk-3.1.5
> >> > >> >       10  0.0159 grep
> >> > >> >        6  0.0096 libcrypto.so.0.9.8
> >> > >> >        4  0.0064 ntpd
> >> > >> >        4  0.0064 sshd
> >> > >> >        1  0.0016 dirname
> >> > >> >        1  0.0016 ls
> >> > >> >        1  0.0016 sleep
> >> > >> >        1  0.0016 libm-2.6.1.so
> >> > >> >        1  0.0016 libncurses.so.5.6
> >> > >> > #
> >> > >> >
> >> > >> > -Robert
> >> > >> >
> >> > >> > On 23.09.08 09:24:27, Niraj Tolia wrote:
> >> > >> >> (resend as my first email seemed to bounce from the mailing list)
> >> > >> >>
> >> > >> >> Hi,
> >> > >> >>
> >> > >> >> I am trying to use oprofile (0.9.4) on a machine with quad-core
> >> > >> >> Opterons running the 2.6.26.5 kernel. However, I can't seem to get any
> >> > >> >> profiling information out. There is nothing obvious in either
> >> > >> >> /var/log/messages or in .../samples/oprofiled.log. Exact sequence of
> >> > >> >> operations below. The kernel was configured to use the Tickless option
> >> > >> >> but oprofile uses NMI on the system.
> >> > >> >>
> >> > >> >> Any ideas on how I might debug this?
> >> > >> >>
> >> > >> >> Cheers,
> >> > >> >> Niraj
> >> > >> >>
> >> > >> >> % cat /proc/cpuinfo | grep name | head -n 1
> >> > >> >> model name      : Quad-Core AMD Opteron(tm) Processor 8354
> >> > >> >>
> >> > >> >> % opcontrol -l | head -n 1
> >> > >> >> oprofile: available events for CPU type "AMD64 family10"
> >> > >> >>
> >> > >> >> % opcontrol --start-daemon --no-vmlinux
> >> > >> >> Using default event: CPU_CLK_UNHALTED:100000:0:1:1
> >> > >> >> Using 2.6+ OProfile kernel interface.
> >> > >> >> Using log file /var/lib/oprofile/samples/oprofiled.log
> >> > >> >> Daemon started.
> >> > >> >>
> >> > >> >> % opcontrol --start
> >> > >> >> Profiler running.
> >> > >> >>
> >> > >> >> (there are 10 CPU intensive tasks running at this point)
> >> > >> >>
> >> > >> >> % sleep 60; opcontrol --dump ; opreport
> >> > >> >> opreport error: No sample file found: try running opcontrol --dump
> >> > >> >> or specify a session containing sample files
> >> > >> >>
> 

-- 
Advanced Micro Devices, Inc.
Operating System Research Center
email: rob...@am...