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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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