perf hists: Print newline between hists callchains

Tiny cosmetic fix. The lack of a newline between hists callchains was
looking slightly messy.

Before:

     0.24%      swapper  [kernel.kallsyms]  [k] _raw_spin_lock_irq
                |
                --- _raw_spin_lock_irq
                    run_timer_softirq
                    __do_softirq
                    call_softirq
                    do_softirq
                    irq_exit
                    smp_apic_timer_interrupt
                    apic_timer_interrupt
                    default_idle
                    amd_e400_idle
                    cpu_idle
                    start_secondary
     0.10%         perf  [kernel.kallsyms]  [k] lock_is_held
                   |
                   --- lock_is_held
                       __might_sleep
                       mutex_lock_nested
                       perf_event_for_each_child
                       perf_ioctl
                       do_vfs_ioctl
                       sys_ioctl
                       system_call_fastpath
                       ioctl
                       cmd_record
                       run_builtin
                       main
                       __libc_start_main

After:

     0.24%      swapper  [kernel.kallsyms]  [k] _raw_spin_lock_irq
                |
                --- _raw_spin_lock_irq
                    run_timer_softirq
                    __do_softirq
                    call_softirq
                    do_softirq
                    irq_exit
                    smp_apic_timer_interrupt
                    apic_timer_interrupt
                    default_idle
                    amd_e400_idle
                    cpu_idle
                    start_secondary

     0.10%         perf  [kernel.kallsyms]  [k] lock_is_held
                   |
                   --- lock_is_held
                       __might_sleep
                       mutex_lock_nested
                       perf_event_for_each_child
                       perf_ioctl
                       do_vfs_ioctl
                       sys_ioctl
                       system_call_fastpath
                       ioctl
                       cmd_record
                       run_builtin
                       main
                       __libc_start_main

Signed-off-by: Frederic Weisbecker <[email protected]>
Cc: David Ahern <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
index 90dc35ae444adee31fffbb2049382adefc7de7c8..f247ef2789a4d77ffe4ee1e9c9d981d065775c3f 100644 (file)
--- a/tools/perf/util/hist.c
+++ b/tools/perf/util/hist.c
@@ -749,6 +749,8 @@ static size_t callchain__fprintf_graph(FILE *fp, struct rb_root *root,
 
        ret += __callchain__fprintf_graph(fp, root, total_samples,
                                          1, 1, left_margin);
+       ret += fprintf(fp, "\n");
+
        return ret;
 }