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    SubjectRe: perf report fractal output issue
    On Thu, Oct 15, 2009 at 09:57:26AM +1100, Anton Blanchard wrote:
    >
    > Hi,
    >
    > I noticed a problem where I wasn't always getting callchains:
    >
    > # perf report
    > 98.47% lock1_processes [kernel] [k] .lock_kernel
    >
    > 0.91% lock1_processes [kernel] [k] .fput
    >
    >
    > But a flat output confirmed the data is there:
    >
    > # perf report -g flat
    > 98.47% lock1_processes [kernel] [k] .lock_kernel
    > 98.47%
    > .lock_kernel
    > .__posix_lock_file
    > (nil)
    > .fcntl_setlk
    > .sys_fcntl
    > syscall_exit
    > 0xfffb7d04844
    > .testcase
    > .testcase
    > .affinitize
    > .new_task
    > .main
    > 0xfffb7c4933c
    > 0xfffb7c4955c
    > (nil)
    >
    > It looks like callchain__fprintf_graph() only prints the callchain if we
    > have at least one rb entry at the top. In my case all the associated
    > backtraces are identical so I assume we dont have to do any splitting.
    >
    > Anton


    Hmm, could you please send me a perf.data where you can see that?
    Does that only happen on powerpc?


    Thanks.



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