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    SubjectRe: [PATCH v4 0/5] perf report: Show branch type
    On Wed, Apr 12, 2017 at 06:21:01AM +0800, Jin Yao wrote:

    SNIP

    >
    > 3. Use 2 bits in perf_branch_entry for a "cross" metrics checking
    > for branch cross 4K or 2M area. It's an approximate computing
    > for checking if the branch cross 4K page or 2MB page.
    >
    > For example:
    >
    > perf record -g --branch-filter any,save_type <command>
    >
    > perf report --stdio
    >
    > JCC forward: 27.7%
    > JCC backward: 9.8%
    > JMP: 0.0%
    > IND_JMP: 6.5%
    > CALL: 26.6%
    > IND_CALL: 0.0%
    > RET: 29.3%
    > IRET: 0.0%
    > CROSS_4K: 0.0%
    > CROSS_2M: 14.3%

    got mangled perf report --stdio output for:


    [root@ibm-x3650m4-02 perf]# ./perf record -j any,save_type kill
    kill: not enough arguments
    [ perf record: Woken up 1 times to write data ]
    [ perf record: Captured and wrote 0.013 MB perf.data (18 samples) ]

    [root@ibm-x3650m4-02 perf]# ./perf report --stdio -f | head -30
    # To display the perf.data header info, please use --header/--header-only options.
    #
    #
    # Total Lost Samples: 0
    #
    # Samples: 253 of event 'cycles'
    # Event count (approx.): 253
    #
    # Overhead Command Source Shared Object Source Symbol Target Symbol Basic Block Cycles
    # ........ ....... .................... ....................................... ....................................... ..................
    #
    8.30% perf
    Um [kernel.vmlinux] [k] __intel_pmu_enable_all.constprop.17 [k] native_write_msr -
    7.91% perf
    Um [kernel.vmlinux] [k] intel_pmu_lbr_enable_all [k] __intel_pmu_enable_all.constprop.17 -
    7.91% perf
    Um [kernel.vmlinux] [k] native_write_msr [k] intel_pmu_lbr_enable_all -
    6.32% kill libc-2.24.so [.] _dl_addr [.] _dl_addr -
    5.93% perf
    Um [kernel.vmlinux] [k] perf_iterate_ctx [k] perf_iterate_ctx -
    2.77% kill libc-2.24.so [.] malloc [.] malloc -
    1.98% kill libc-2.24.so [.] _int_malloc [.] _int_malloc -
    1.58% kill [kernel.vmlinux] [k] __rb_insert_augmented [k] __rb_insert_augmented -
    1.58% perf
    Um [kernel.vmlinux] [k] perf_event_exec [k] perf_event_exec -
    1.19% kill [kernel.vmlinux] [k] anon_vma_interval_tree_insert [k] anon_vma_interval_tree_insert -
    1.19% kill [kernel.vmlinux] [k] free_pgd_range [k] free_pgd_range -
    1.19% kill [kernel.vmlinux] [k] n_tty_write [k] n_tty_write -
    1.19% perf
    Um [kernel.vmlinux] [k] native_sched_clock [k] sched_clock -
    ...
    SNIP


    jirka

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