This patchset is the re-spin of the original branch stack
sampling
patchset which introduced new PERF_SAMPLE_BRANCH_COND branch filter. This
patchset
also enables SW based branch filtering support for book3s powerpc platforms
which
have PMU HW backed branch stack sampling support.
Summary of code changes in this patchset:
(1) Introduces a new PERF_SAMPLE_BRANCH_COND branch filter
(2) Add the "cond" branch filter options in the "perf record" tool
(3) Enable PERF_SAMPLE_BRANCH_COND in X86 platforms
(4) Enable PERF_SAMPLE_BRANCH_COND in POWER8 platform
(5) Update the documentation regarding "perf record" tool
(6) Add some new powerpc instruction analysis functions in code-patching library
(7) Enable SW based branch filter support for powerpc book3s
(8) Changed BHRB configuration in POWER8 to accommodate SW branch filters
With this new SW enablement, the branch filter support for book3s platforms have
been extended to include all these combinations discussed below with a sample
test
application program (included here).
Changes in V2
=============
(1) Enabled PPC64 SW branch filtering support
(2) Incorporated changes required for all previous comments
Changes in V3
=============
(1) Split the SW branch filter enablement into multiple patches
(2) Added PMU neutral SW branch filtering code, PMU specific HW branch
filtering code
(3) Added new instruction analysis functionality into powerpc code-patching
library
(4) Changed name for some of the functions
(5) Fixed couple of spelling mistakes
(6) Changed code documentation in multiple places
PMU HW branch filters
=====================
(1) perf record -j any_call -e branch-misses:u ./cprog
# Overhead Command Source Shared Object Source Symbol Target Shared
Object Target Symbol
# ........ ....... .................... .....................
.................... ........................
#
7.00% cprog cprog [.] sw_3_1 cprog
[.] sw_3_1_2
6.99% cprog cprog [.] hw_1_1 cprog
[.] symbol1
6.52% cprog cprog [.] sw_3_1 cprog
[.] success_3_1_2
5.41% cprog cprog [.] sw_3_1 cprog
[.] sw_3_1_3
5.40% cprog cprog [.] hw_1_2 cprog
[.] symbol2
5.40% cprog cprog [.] callme cprog
[.] hw_1_2
5.40% cprog cprog [.] sw_3_1 cprog
[.] success_3_1_1
5.40% cprog cprog [.] callme cprog
[.] hw_1_1
5.39% cprog cprog [.] sw_3_1 cprog
[.] sw_3_1_1
5.39% cprog cprog [.] sw_4_2 cprog
[.] lr_addr
5.39% cprog cprog [.] callme cprog
[.] sw_4_2
5.37% cprog [unknown] [.] 00000000 cprog
[.] ctr_addr
4.30% cprog cprog [.] callme cprog
[.] hw_2_1
4.28% cprog cprog [.] callme cprog
[.] sw_3_1
3.82% cprog cprog [.] sw_3_1 cprog
[.] success_3_1_3
3.81% cprog cprog [.] callme cprog
[.] hw_2_2
3.81% cprog cprog [.] callme cprog
[.] sw_3_2
2.71% cprog [unknown] [.] 00000000 cprog
[.] lr_addr
2.70% cprog cprog [.] main cprog
[.] callme
2.70% cprog cprog [.] sw_4_1 cprog
[.] ctr_addr
2.70% cprog cprog [.] callme cprog
[.] sw_4_1
0.08% cprog [unknown] [.] 0xf78676c4 [unknown]
[.] 0xf78522c0
0.02% cprog [unknown] [k] 00000000 cprog
[k] ctr_addr
0.01% cprog [kernel.kallsyms] [.] .power_pmu_enable
[kernel.kallsyms] [.] .power8_compute_mmcr
0.00% cprog ld-2.11.2.so [.] malloc [unknown]
[.] 0xf786b380
0.00% cprog ld-2.11.2.so [.] calloc [unknown]
[.] 0xf786b390
0.00% cprog cprog [.] main [unknown]
[.] 0x10000950
0.00% cprog [unknown] [.] 00000000
[kernel.kallsyms] [.] .power_pmu_enable
(2) perf record -j cond -e branch-misses:u ./cprog
# Overhead Command Source Shared Object Source Symbol Target
Shared Object Target Symbol
# ........ ....... .................... .......................
.................... .......................
#
27.73% cprog [unknown] [.] 00000000 cprog
[.] callme
13.03% cprog cprog [.] sw_3_1 cprog
[.] sw_3_1
5.64% cprog [unknown] [.] 00000000 cprog
[.] main
5.62% cprog [unknown] [.] 00000000 cprog
[.] sw_4_2
5.46% cprog cprog [.] sw_4_2 cprog
[.] lr_addr
5.40% cprog [unknown] [.] 00000000 cprog
[.] sw_4_1
3.72% cprog cprog [.] hw_2_1 cprog
[.] callme
3.71% cprog cprog [.] main cprog
[.] hw_1_1
3.71% cprog cprog [.] sw_3_1_2 cprog
[.] sw_3_1
3.70% cprog cprog [.] sw_3_1_3 cprog
[.] sw_3_1
3.70% cprog cprog [.] sw_4_1 cprog
[.] ctr_addr
3.69% cprog cprog [.] hw_1_2 cprog
[.] hw_1_2
3.69% cprog cprog [.] hw_2_2 cprog
[.] callme
3.68% cprog cprog [.] sw_3_1_1 cprog
[.] sw_3_1
1.93% cprog [unknown] [.] 00000000 cprog
[.] lr_addr
1.78% cprog [unknown] [.] 00000000 cprog
[.] hw_1_2
1.78% cprog [unknown] [.] 00000000 cprog
[.] sw_3_1
1.76% cprog [unknown] [.] 00000000 cprog
[.] hw_1_1
0.12% cprog [unknown] [.] 0xf7bb25dc [unknown]
[.] 0xf7bb27e4
0.07% cprog [unknown] [k] 00000000 cprog
[k] callme
0.07% cprog [unknown] [k] 00000000 cprog
[k] sw_4_1
0.00% cprog libc-2.11.2.so [.] _IO_file_doallocate
libc-2.11.2.so [.] _IO_file_doallocate
0.00% cprog libc-2.11.2.so [.] _IO_file_doallocate
libc-2.11.2.so [.] isatty
0.00% cprog [unknown] [.] 00000000
libc-2.11.2.so [.] _IO_file_doallocate
SW based branch filters
=======================
(3) perf record -j any_ret -e branch-misses:u ./cprog
# Overhead Command Source Shared Object Source Symbol Target Shared
Object Target Symbol
# ........ ....... .................... ....................
.................... .....................
#
15.37% cprog [unknown] [.] 00000000 cprog
[.] sw_3_1
6.46% cprog cprog [.] success_3_1_3 cprog
[.] sw_3_1
6.45% cprog cprog [.] symbol1 cprog
[.] hw_1_1
6.41% cprog [unknown] [.] 00000000 cprog
[.] callme
6.39% cprog cprog [.] ctr_addr cprog
[.] sw_4_1
6.37% cprog cprog [.] symbol2 cprog
[.] hw_1_2
6.36% cprog cprog [.] sw_4_2 cprog
[.] callme
6.35% cprog cprog [.] lr_addr cprog
[.] sw_4_2
3.97% cprog cprog [.] back1 cprog
[.] callme
3.93% cprog cprog [.] sw_3_1_2 cprog
[.] sw_3_1
3.93% cprog cprog [.] sw_3_1 cprog
[.] callme
3.86% cprog cprog [.] sw_3_1_3 cprog
[.] sw_3_1
3.84% cprog cprog [.] sw_3_1_1 cprog
[.] sw_3_1
2.54% cprog cprog [.] success_3_1_1 cprog
[.] sw_3_1
2.54% cprog cprog [.] sw_4_1 cprog
[.] callme
2.54% cprog cprog [.] hw_1_1 cprog
[.] callme
2.53% cprog cprog [.] sw_3_2 cprog
[.] callme
2.52% cprog cprog [.] callme cprog
[.] main
2.51% cprog cprog [.] hw_1_2 cprog
[.] callme
2.51% cprog cprog [.] back2 cprog
[.] callme
2.51% cprog cprog [.] success_3_1_2 cprog
[.] sw_3_1
0.07% cprog [unknown] [k] 00000000 cprog
[k] callme
0.02% cprog [unknown] [.] 00000000 [unknown]
[.] 0xf7e5c004
0.01% cprog libc-2.11.2.so [.] __errno_location libc-2.11.2.so
[.] vfprintf
0.01% cprog [unknown] [.] 00000000 libc-2.11.2.so
[.] _IO_file_overflow
(4) perf record -j ind_call -e branch-misses:u ./cprog
# Overhead Command Source Shared Object Source Symbol Target Shared
Object Target Symbol
# ........ ....... .................... ...................
.................... .....................
#
48.04% cprog [unknown] [.] 00000000 cprog
[.] sw_3_1
19.96% cprog cprog [.] sw_4_2 cprog
[.] lr_addr
19.69% cprog [unknown] [.] 00000000 cprog
[.] callme
12.04% cprog cprog [.] sw_4_1 cprog
[.] ctr_addr
0.18% cprog [unknown] [k] 00000000 cprog
[k] callme
0.02% cprog libc-2.11.2.so [.] _IO_file_xsputn libc-2.11.2.so
[.] _IO_file_overflow
0.02% cprog [unknown] [.] 00000000 libc-2.11.2.so
[.] _IO_file_xsputn
0.02% cprog [unknown] [.] 00000000 ld-2.11.2.so
[.] malloc
0.02% cprog [unknown] [k] 00000000 cprog
[k] sw_3_1
(5) perf record -j any_call,any_ret -e branch-misses:u ./cprog
# Overhead Command Source Shared Object Source Symbol Target
Shared Object Target Symbol
# ........ ....... .................... .......................
.................... .......................
#
10.36% cprog [unknown] [.] 00000000 cprog
[.] sw_3_1
4.18% cprog cprog [.] symbol1 cprog
[.] hw_1_1
4.18% cprog cprog [.] success_3_1_3 cprog
[.] sw_3_1
4.17% cprog cprog [.] sw_4_2 cprog
[.] lr_addr
4.16% cprog cprog [.] sw_4_2 cprog
[.] callme
4.15% cprog cprog [.] ctr_addr cprog
[.] sw_4_1
4.15% cprog cprog [.] lr_addr cprog
[.] sw_4_2
4.14% cprog cprog [.] symbol2 cprog
[.] hw_1_2
4.14% cprog [unknown] [.] 00000000 cprog
[.] callme
2.15% cprog cprog [.] sw_3_1 cprog
[.] callme
2.14% cprog cprog [.] hw_1_1 cprog
[.] symbol1
2.14% cprog cprog [.] callme cprog
[.] hw_1_1
2.14% cprog cprog [.] callme cprog
[.] sw_4_2
2.13% cprog cprog [.] back1 cprog
[.] callme
2.12% cprog cprog [.] sw_3_1_2 cprog
[.] sw_3_1
2.12% cprog cprog [.] sw_3_1 cprog
[.] sw_3_1_2
2.11% cprog cprog [.] sw_3_1_3 cprog
[.] sw_3_1
2.11% cprog cprog [.] sw_3_1 cprog
[.] sw_3_1_3
2.11% cprog cprog [.] sw_4_1 cprog
[.] ctr_addr
2.10% cprog cprog [.] hw_1_2 cprog
[.] symbol2
2.10% cprog cprog [.] sw_3_1_1 cprog
[.] sw_3_1
2.10% cprog cprog [.] sw_3_1 cprog
[.] sw_3_1_1
2.10% cprog cprog [.] callme cprog
[.] hw_1_2
2.10% cprog cprog [.] callme cprog
[.] sw_3_1
2.05% cprog cprog [.] success_3_1_1 cprog
[.] sw_3_1
2.05% cprog cprog [.] sw_3_1 cprog
[.] success_3_1_1
2.05% cprog cprog [.] success_3_1_2 cprog
[.] sw_3_1
2.05% cprog cprog [.] sw_3_1 cprog
[.] success_3_1_2
2.04% cprog cprog [.] hw_1_1 cprog
[.] callme
2.04% cprog cprog [.] back2 cprog
[.] callme
2.04% cprog cprog [.] sw_4_1 cprog
[.] callme
2.04% cprog cprog [.] callme cprog
[.] main
2.04% cprog cprog [.] hw_1_2 cprog
[.] callme
2.04% cprog cprog [.] sw_3_2 cprog
[.] callme
2.04% cprog cprog [.] callme cprog
[.] sw_3_2
2.03% cprog cprog [.] sw_3_1 cprog
[.] success_3_1_3
0.03% cprog [unknown] [k] 00000000 cprog
[k] callme
0.01% cprog [unknown] [.] 0xf7e79bb0 [unknown]
[.] 0xf7e64088
0.00% cprog libc-2.11.2.so [.] _IO_file_doallocate
libc-2.11.2.so [.] mmap
0.00% cprog libc-2.11.2.so [.] mmap
libc-2.11.2.so [.] _IO_file_doallocate
0.00% cprog [unknown] [.] 0xf7e7589c
libc-2.11.2.so [.] printf
0.00% cprog [unknown] [k] 00000000 cprog
[k] sw_3_1
(6) perf record -j any_call,ind_call -e branch-misses:u ./cprog
# Overhead Command Source Shared Object Source Symbol Target Shared Object
Target Symbol
# ........ ....... .................... .............. ....................
.................
#
23.09% cprog [unknown] [.] 00000000 cprog
[.] sw_3_1
8.99% cprog cprog [.] sw_4_2 cprog
[.] lr_addr
8.92% cprog [unknown] [.] 00000000 cprog
[.] callme
5.18% cprog cprog [.] sw_3_1 cprog
[.] success_3_1_2
5.16% cprog cprog [.] sw_3_1 cprog
[.] success_3_1_1
5.16% cprog cprog [.] callme cprog
[.] sw_3_2
5.12% cprog cprog [.] sw_3_1 cprog
[.] success_3_1_3
3.85% cprog cprog [.] sw_3_1 cprog
[.] sw_3_1_1
3.85% cprog cprog [.] callme cprog
[.] sw_3_1
3.84% cprog cprog [.] sw_4_1 cprog
[.] ctr_addr
3.82% cprog cprog [.] hw_1_1 cprog
[.] symbol1
3.82% cprog cprog [.] sw_3_1 cprog
[.] sw_3_1_2
3.82% cprog cprog [.] sw_3_1 cprog
[.] sw_3_1_3
3.82% cprog cprog [.] callme cprog
[.] hw_1_1
3.81% cprog cprog [.] hw_1_2 cprog
[.] symbol2
3.81% cprog cprog [.] callme cprog
[.] hw_1_2
3.81% cprog cprog [.] callme cprog
[.] sw_4_2
0.05% cprog [unknown] [k] 00000000 cprog
[k] callme
0.03% cprog [unknown] [.] 0xf7f7232c [unknown]
[.] 0xf7f72334
0.01% cprog ld-2.11.2.so [.] malloc [unknown]
[.] 0xf7f8b380
0.01% cprog cprog [.] main [unknown]
[.] 0x10000950
0.01% cprog [unknown] [.] 00000000 ld-2.11.2.so
[.] malloc
0.01% cprog [unknown] [.] 00000000 cprog
[.] main
(7) perf record -j cond,any_ret -e branch-misses:u ./cprog
# Overhead Command Source Shared Object Source Symbol Target Shared
Object Target Symbol
# ........ ....... .................... .....................
.................... .....................
#
12.18% cprog [unknown] [.] 00000000 cprog
[.] sw_3_1
4.90% cprog cprog [.] sw_4_2 cprog
[.] lr_addr
4.88% cprog [unknown] [.] 00000000 cprog
[.] callme
4.88% cprog cprog [.] lr_addr cprog
[.] sw_4_2
4.88% cprog cprog [.] sw_4_2 cprog
[.] callme
4.86% cprog cprog [.] symbol1 cprog
[.] hw_1_1
4.86% cprog cprog [.] success_3_1_3 cprog
[.] sw_3_1
4.85% cprog cprog [.] symbol2 cprog
[.] hw_1_2
4.85% cprog cprog [.] ctr_addr cprog
[.] sw_4_1
2.47% cprog cprog [.] sw_3_1_3 cprog
[.] sw_3_1
2.46% cprog cprog [.] back1 cprog
[.] callme
2.45% cprog cprog [.] hw_1_1 cprog
[.] callme
2.45% cprog cprog [.] hw_2_1 cprog
[.] address1
2.44% cprog cprog [.] hw_1_2 cprog
[.] symbol2
2.44% cprog cprog [.] sw_3_1_1 cprog
[.] sw_3_1
2.44% cprog cprog [.] sw_3_2 cprog
[.] callme
2.44% cprog cprog [.] success_3_1_1 cprog
[.] sw_3_1
2.44% cprog cprog [.] sw_3_1 cprog
[.] success_3_1_1
2.44% cprog cprog [.] sw_3_1 cprog
[.] success_3_1_3
2.43% cprog cprog [.] callme cprog
[.] main
2.43% cprog cprog [.] hw_2_2 cprog
[.] address2
2.43% cprog cprog [.] sw_3_1_2 cprog
[.] sw_3_1
2.43% cprog cprog [.] success_3_1_2 cprog
[.] sw_3_1
2.43% cprog cprog [.] sw_3_1 cprog
[.] success_3_1_2
2.43% cprog cprog [.] sw_4_1 cprog
[.] callme
2.42% cprog cprog [.] sw_3_1 cprog
[.] callme
2.42% cprog cprog [.] sw_4_1 cprog
[.] ctr_addr
2.42% cprog cprog [.] back2 cprog
[.] callme
2.40% cprog cprog [.] hw_1_2 cprog
[.] callme
0.10% cprog [unknown] [.] 0xf78923e0 [unknown]
[.] 0xf78923c0
0.03% cprog [unknown] [k] 00000000 cprog
[k] callme
0.01% cprog [unknown] [k] 00000000 cprog
[k] sw_3_1
0.01% cprog libc-2.11.2.so [.] vfprintf
libc-2.11.2.so [.] vfprintf
0.01% cprog libc-2.11.2.so [.] _IO_file_overflow [unknown]
[.] 0x0fee0100
0.01% cprog libc-2.11.2.so [.] strchrnul
libc-2.11.2.so [.] vfprintf
0.01% cprog libc-2.11.2.so [.] strchrnul
libc-2.11.2.so [.] strchrnul
0.01% cprog [unknown] [.] 00000000
libc-2.11.2.so [.] _IO_file_overflow
(8) perf record -j cond,ind_call -e branch-misses:u ./cprog
# Overhead Command Source Shared Object Source Symbol Target Shared Object
Target Symbol
# ........ ....... .................... .............. ....................
...................
#
26.21% cprog [unknown] [.] 00000000 cprog
[.] sw_3_1
10.50% cprog cprog [.] sw_4_2 cprog
[.] lr_addr
10.38% cprog [unknown] [.] 00000000 cprog
[.] callme
5.31% cprog cprog [.] sw_3_1_2 cprog
[.] sw_3_1
5.30% cprog cprog [.] sw_3_1_1 cprog
[.] sw_3_1
5.27% cprog cprog [.] sw_3_1 cprog
[.] success_3_1_2
5.26% cprog cprog [.] hw_2_2 cprog
[.] address2
5.25% cprog cprog [.] hw_1_2 cprog
[.] symbol2
5.25% cprog cprog [.] sw_3_1 cprog
[.] success_3_1_3
5.24% cprog cprog [.] hw_2_1 cprog
[.] address1
5.23% cprog cprog [.] sw_4_1 cprog
[.] ctr_addr
5.20% cprog cprog [.] sw_3_1_3 cprog
[.] sw_3_1
5.19% cprog cprog [.] sw_3_1 cprog
[.] success_3_1_1
0.24% cprog [unknown] [.] 0xf7cf23e0 [unknown]
[.] 0xf7cf23c0
0.11% cprog [unknown] [k] 00000000 cprog
[k] callme
0.01% cprog libc-2.11.2.so [.] vfprintf libc-2.11.2.so
[.] vfprintf
0.01% cprog libc-2.11.2.so [.] vfprintf libc-2.11.2.so
[.] _IO_file_xsputn
0.01% cprog [unknown] [.] 00000000 libc-2.11.2.so
[.] vfprintf
0.01% cprog [unknown] [k] 00000000 cprog
[k] sw_3_1
(9) perf record -j any_call,cond,any_ret -e branch-misses:u ./cprog
# Overhead Command Source Shared Object Source Symbol Target Shared
Object Target Symbol
# ........ ....... .................... .................
.................... .....................
#
9.96% cprog [unknown] [.] 00000000 cprog
[.] sw_3_1
4.06% cprog cprog [.] sw_4_2 cprog
[.] lr_addr
4.04% cprog cprog [.] lr_addr cprog
[.] sw_4_2
4.03% cprog cprog [.] symbol1 cprog
[.] hw_1_1
4.02% cprog [unknown] [.] 00000000 cprog
[.] callme
3.96% cprog cprog [.] ctr_addr cprog
[.] sw_4_1
3.94% cprog cprog [.] symbol2 cprog
[.] hw_1_2
3.94% cprog cprog [.] success_3_1_3 cprog
[.] sw_3_1
3.93% cprog cprog [.] sw_4_2 cprog
[.] callme
2.08% cprog cprog [.] sw_3_2 cprog
[.] callme
2.08% cprog cprog [.] callme cprog
[.] sw_3_2
2.07% cprog cprog [.] hw_2_2 cprog
[.] address2
2.07% cprog cprog [.] success_3_1_2 cprog
[.] sw_3_1
2.07% cprog cprog [.] sw_3_1 cprog
[.] success_3_1_2
2.07% cprog cprog [.] back2 cprog
[.] callme
2.06% cprog cprog [.] hw_1_1 cprog
[.] callme
1.99% cprog cprog [.] sw_4_1 cprog
[.] ctr_addr
1.98% cprog cprog [.] sw_3_1_3 cprog
[.] sw_3_1
1.98% cprog cprog [.] success_3_1_1 cprog
[.] sw_3_1
1.98% cprog cprog [.] sw_3_1 cprog
[.] sw_3_1_3
1.98% cprog cprog [.] sw_3_1 cprog
[.] success_3_1_1
1.98% cprog cprog [.] callme cprog
[.] sw_4_2
1.98% cprog cprog [.] back1 cprog
[.] callme
1.97% cprog cprog [.] hw_1_1 cprog
[.] symbol1
1.97% cprog cprog [.] hw_2_1 cprog
[.] address1
1.97% cprog cprog [.] sw_3_1_1 cprog
[.] sw_3_1
1.97% cprog cprog [.] sw_3_1 cprog
[.] sw_3_1_1
1.97% cprog cprog [.] sw_3_1 cprog
[.] success_3_1_3
1.97% cprog cprog [.] callme cprog
[.] hw_1_1
1.97% cprog cprog [.] callme cprog
[.] sw_3_1
1.97% cprog cprog [.] hw_1_2 cprog
[.] symbol2
1.97% cprog cprog [.] hw_1_2 cprog
[.] callme
1.97% cprog cprog [.] sw_4_1 cprog
[.] callme
1.97% cprog cprog [.] callme cprog
[.] main
1.97% cprog cprog [.] callme cprog
[.] hw_1_2
1.96% cprog cprog [.] sw_3_1 cprog
[.] callme
1.96% cprog cprog [.] sw_3_1_2 cprog
[.] sw_3_1
1.96% cprog cprog [.] sw_3_1 cprog
[.] sw_3_1_2
0.12% cprog [unknown] [.] 0xf7ab23e0 [unknown]
[.] 0xf7ab23c0
0.04% cprog [unknown] [k] 00000000 cprog
[k] callme
0.01% cprog [unknown] [k] 00000000 cprog
[k] sw_3_1
0.00% cprog libc-2.11.2.so [.] vfprintf libc-2.11.2.so
[.] vfprintf
0.00% cprog libc-2.11.2.so [.] _IO_do_write libc-2.11.2.so
[.] _IO_do_write
0.00% cprog libc-2.11.2.so [.] _IO_do_write libc-2.11.2.so
[.] _IO_file_overflow
0.00% cprog libc-2.11.2.so [.] strchrnul libc-2.11.2.so
[.] vfprintf
0.00% cprog libc-2.11.2.so [.] strchrnul libc-2.11.2.so
[.] strchrnul
0.00% cprog cprog [.] callme cprog
[.] hw_2_2
0.00% cprog [unknown] [.] 00000000 libc-2.11.2.so
[.] _IO_do_write
(10) perf record -j any_call,cond,ind_call -e branch-misses:u ./cprog
# Overhead Command Source Shared Object Source Symbol Target Shared
Object Target Symbol
# ........ ....... .................... .....................
.................... .....................
#
17.81% cprog [unknown] [.] 00000000 cprog
[.] sw_3_1
7.19% cprog cprog [.] sw_4_2 cprog
[.] lr_addr
7.12% cprog [unknown] [.] 00000000 cprog
[.] callme
3.71% cprog cprog [.] sw_3_1 cprog
[.] success_3_1_2
3.68% cprog cprog [.] callme cprog
[.] sw_3_2
3.67% cprog cprog [.] hw_2_2 cprog
[.] address2
3.57% cprog cprog [.] hw_2_1 cprog
[.] address1
3.55% cprog cprog [.] hw_1_1 cprog
[.] symbol1
3.55% cprog cprog [.] sw_3_1 cprog
[.] success_3_1_1
3.55% cprog cprog [.] callme cprog
[.] hw_1_1
3.54% cprog cprog [.] sw_3_1_1 cprog
[.] sw_3_1
3.54% cprog cprog [.] sw_3_1 cprog
[.] sw_3_1_1
3.54% cprog cprog [.] sw_4_1 cprog
[.] ctr_addr
3.54% cprog cprog [.] callme cprog
[.] sw_3_1
3.52% cprog cprog [.] sw_3_1_3 cprog
[.] sw_3_1
3.52% cprog cprog [.] sw_3_1 cprog
[.] sw_3_1_3
3.52% cprog cprog [.] sw_3_1 cprog
[.] success_3_1_3
3.52% cprog cprog [.] sw_3_1_2 cprog
[.] sw_3_1
3.52% cprog cprog [.] sw_3_1 cprog
[.] sw_3_1_2
3.51% cprog cprog [.] hw_1_2 cprog
[.] symbol2
3.51% cprog cprog [.] callme cprog
[.] hw_1_2
3.49% cprog cprog [.] callme cprog
[.] sw_4_2
0.22% cprog [unknown] [.] 0xf7ca23f4 [unknown]
[.] 0xf7ca25d0
0.05% cprog [unknown] [k] 00000000 cprog
[k] callme
0.01% cprog libc-2.11.2.so [.] vfprintf
libc-2.11.2.so [.] vfprintf
0.01% cprog libc-2.11.2.so [.] vfprintf
libc-2.11.2.so [.] strchrnul
0.01% cprog libc-2.11.2.so [.] _IO_file_overflow
libc-2.11.2.so [.] _IO_file_overflow
0.01% cprog libc-2.11.2.so [.] strchrnul
libc-2.11.2.so [.] strchrnul
0.01% cprog [unknown] [.] 00000000
libc-2.11.2.so [.] _IO_file_overflow
0.01% cprog [unknown] [k] 00000000 cprog
[k] sw_3_1
(11) perf record -j any_call,cond,any_ret,ind_call -e branch-misses:u ./cprog
# Overhead Command Source Shared Object Source Symbol Target Shared
Object Target Symbol
# ........ ....... .................... .................
.................... ...................
#
9.72% cprog [unknown] [.] 00000000 cprog
[.] sw_3_1
3.99% cprog cprog [.] ctr_addr cprog
[.] sw_4_1
3.98% cprog cprog [.] success_3_1_3 cprog
[.] sw_3_1
3.98% cprog cprog [.] symbol1 cprog
[.] hw_1_1
3.98% cprog cprog [.] symbol2 cprog
[.] hw_1_2
3.98% cprog cprog [.] sw_4_2 cprog
[.] lr_addr
3.98% cprog cprog [.] sw_4_2 cprog
[.] callme
3.97% cprog cprog [.] lr_addr cprog
[.] sw_4_2
3.91% cprog [unknown] [.] 00000000 cprog
[.] callme
2.22% cprog cprog [.] sw_4_1 cprog
[.] ctr_addr
2.22% cprog cprog [.] callme cprog
[.] sw_4_2
2.22% cprog cprog [.] hw_2_1 cprog
[.] address1
2.22% cprog cprog [.] back1 cprog
[.] callme
2.21% cprog cprog [.] hw_1_2 cprog
[.] symbol2
2.21% cprog cprog [.] sw_3_1 cprog
[.] callme
2.21% cprog cprog [.] callme cprog
[.] hw_1_2
2.21% cprog cprog [.] sw_3_1_1 cprog
[.] sw_3_1
2.21% cprog cprog [.] sw_3_1_3 cprog
[.] sw_3_1
2.21% cprog cprog [.] sw_3_1 cprog
[.] sw_3_1_1
2.21% cprog cprog [.] sw_3_1 cprog
[.] sw_3_1_3
2.21% cprog cprog [.] callme cprog
[.] sw_3_1
2.20% cprog cprog [.] hw_1_1 cprog
[.] symbol1
2.20% cprog cprog [.] sw_3_1_2 cprog
[.] sw_3_1
2.20% cprog cprog [.] sw_3_1 cprog
[.] sw_3_1_2
2.20% cprog cprog [.] callme cprog
[.] hw_1_1
1.77% cprog cprog [.] hw_1_1 cprog
[.] callme
1.77% cprog cprog [.] success_3_1_1 cprog
[.] sw_3_1
1.77% cprog cprog [.] sw_3_1 cprog
[.] success_3_1_1
1.77% cprog cprog [.] success_3_1_2 cprog
[.] sw_3_1
1.77% cprog cprog [.] sw_3_1 cprog
[.] success_3_1_2
1.77% cprog cprog [.] sw_3_1 cprog
[.] success_3_1_3
1.76% cprog cprog [.] hw_1_2 cprog
[.] callme
1.76% cprog cprog [.] sw_4_1 cprog
[.] callme
1.76% cprog cprog [.] sw_3_2 cprog
[.] callme
1.76% cprog cprog [.] callme cprog
[.] main
1.76% cprog cprog [.] callme cprog
[.] sw_3_2
1.75% cprog cprog [.] hw_2_2 cprog
[.] address2
1.75% cprog cprog [.] back2 cprog
[.] callme
0.13% cprog [unknown] [.] 0xf7dd23e0 [unknown]
[.] 0xf7dd23c0
0.07% cprog [unknown] [k] 00000000 cprog
[k] callme
0.00% cprog libc-2.11.2.so [.] vfprintf libc-2.11.2.so
[.] vfprintf
0.00% cprog libc-2.11.2.so [.] vfprintf libc-2.11.2.so
[.] _IO_file_xsputn
0.00% cprog [unknown] [.] 00000000 libc-2.11.2.so
[.] vfprintf
Test application program
========================
(1) Makefile:
--------------------------------------------
all: sample.o cprog of.cprog of.sample
sample.o: sample.s
as -o sample.o sample.s
cprog: cprog.c sample.o
gcc -o cprog cprog.c sample.o
of.sample: sample.o
objdump -d sample.o > of.sample
of.cprog: cprog
objdump -d cprog > of.cprog
clean:
rm sample.o cprog of.sample of.cprog
---------------------------------------------
(2) cprog.c
---------------------------------------------
#include <stdio.h>
#define LOOP_COUNT 10000
extern void callme(void);
int main(int argc, char *argv[])
{
int i;
for(i = 0; i < LOOP_COUNT; i++)
callme();
printf("end");
return 0;
}
---------------------------------------------
(3) sample.S
---------------------------------------------
# r25, r26, r27 will be used as first level, second level
# and third level stack for LR. Register r20, r21, r22, r23
# r24 will be used for general programming purpose.
.data
msg:
.string "BHRB filter tests\n"
len = . - msg
msg_1_1:
.string "Test: hw_1_1\n"
len_1_1 = 13
msg_1_2:
.string "Test: hw_1_2\n"
len_1_2 = 13
msg_2_1:
.string "Test: hw_2_1\n"
len_2_1 = 13
msg_2_2:
.string "Test: hw_2_2\n"
len_2_2 = 13
msg_3_1:
.string "Test: sw_3_1\n"
len_3_1 = 13
msg_3_1_1:
.string "Test: sw_3_1_1\n"
len_3_1_1 = 15
msg_3_1_2:
.string "Test: sw_3_1_2\n"
len_3_1_2 = 15
msg_3_1_3:
.string "Test: sw_3_1_3\n"
len_3_1_3 = 15
msg_3_2:
.string "Test: sw_3_2\n"
len_3_3 = 13
msg_4_1:
.string "Test: sw_4_1\n"
len_4_1 = 13
msg_4_2:
.string "Test: sw_4_2\n"
len_4_2 = 13
hw_3_1_1_passed:
.string "\thw_3_1_1_passed\n\n"
len_hw_3_1_1_passed = 18
hw_3_1_2_passed:
.string "\thw_3_1_2_passed\n\n"
len_hw_3_1_2_passed = 18
hw_3_1_3_passed:
.string "\thw_3_1_3_passed\n\n"
len_hw_3_1_3_passed = 18
hw_2_1_passed:
.string "\thw_2_1_passed\n\n"
len_hw_2_1_passed = 16
hw_2_2_passed:
.string "\thw_2_2_passed\n\n"
len_hw_2_2_passed = 16
hw_1_1_passed:
.string "\thw_1_1_passed\n\n"
len_hw_1_1_passed = 16
hw_1_2_passed:
.string "\thw_1_2_passed\n\n"
len_hw_1_2_passed = 16
hw_4_1_passed:
.string "\thw_4_1_passed\n\n"
len_hw_4_1_passed = 16
hw_4_2_passed:
.string "\thw_4_2_passed\n\n"
len_hw_4_2_passed = 16
msg_error:
.string "\tError\n"
len_error = 7
.text
.global callme
.global hw_1_1
.global hw_1_2
.global hw_2_1
.global hw_2_2
# HW filter test symbols
symbol1:
# Print "hw_1_1_passed"
li 0, 4
li 3, 1
lis 4, hw_1_1_passed@ha
addi 4, 4, hw_1_1_passed@l
li 5, len_hw_1_1_passed
sc
blr # PERF_SAMPLE_BRANCH_ANY_RET
hw_1_1:
# Save LR - second level
mflr 26
# Print "hw_1_1 called"
li 0, 4
li 3, 1
lis 4, msg_1_1@ha
addi 4, 4, msg_1_1@l
li 5, len_1_1
sc
bl symbol1 # PERF_SAMPLE_BRANCH_ANY_CALL
# Restore LR
mtlr 26
blr # PERF_SAMPLE_BRANCH_ANY_RET
symbol2:
# Print "Symbol2 taken"
li 0, 4
li 3, 1
lis 4, hw_1_2_passed@ha
addi 4, 4, hw_1_2_passed@l
li 5, len_hw_1_2_passed
sc
blr # PERF_SAMPLE_BRANCH_ANY_RET
hw_1_2:
# Save LR - second level
mflr 26
# Print "hw_1_2 called"
li 0, 4
li 3, 1
lis 4, msg_1_2@ha
addi 4, 4, msg_1_2@l
li 5, len_1_2
sc
li 4,20
cmpi 0,4,20
bcl 12, 4*cr0+2, symbol2 # PERF_SAMPLE_BRANCH_ANY_CALL |
PERF_SAMPLE_BRANCH_COND
mtlr 26
blr # PERF_SAMPLE_BRANCH_ANY_RET
# HW filter test
address1:
# Print "hw_2_1_passed"
li 0, 4
li 3, 1
lis 4, hw_2_1_passed@ha
addi 4, 4, hw_2_1_passed@l
li 5, len_hw_2_1_passed
sc
b back1 # PERF_SAMPLE_BRANCH_ANY
hw_2_1:
# Print "hw_2_1 called"
li 0, 4
li 3, 1
lis 4, msg_2_1@ha
addi 4, 4, msg_2_1@l
li 5, len_2_1
sc
# Simple conditional branch (equal)
li 20, 12
cmpi 3, 20, 12
bc 12, 4*cr3+2, address1 # PERF_SAMPLE_BRANCH_COND
back1:
blr # PERF_SAMPLE_BRANCH_ANY_RET
address2:
# Print "hw_2_2_passed"
li 0, 4
li 3, 1
lis 4, hw_2_2_passed@ha
addi 4, 4, hw_2_2_passed@l
li 5, len_hw_2_2_passed
sc
b back2 # PERF_SAMPLE_BRANCH_ANY
hw_2_2:
# Print "hw_2_2 called"
li 0, 4
li 3, 1
lis 4, msg_2_2@ha
addi 4, 4, msg_2_2@l
li 5, len_2_2
sc
# Simple conditional branch (less than)
li 20, 12
cmpi 4, 20, 20
bc 12, 4*cr4+0, address2 # PERF_SAMPLE_BRANCH_COND
back2:
blr # PERF_SAMPLE_BRANCH_ANY_RET
# SW filter test symbols
sw_3_1_1:
# Print "Test: sw_3_1_1"
li 0, 4
li 3, 1
lis 4, msg_3_1_1@ha
addi 4, 4, msg_3_1_1@l
li 5, len_3_1_1
sc
li 22,0
# Test the condition and return
li 21, 10
cmpi 0, 21, 10
bclr 12, 2 # PERF_SAMPLE_BRANCH_ANY_RET |
PERF_SAMPLE_BRANCH_COND
# Should not have come here
li 0, 4
li 3, 1
lis 4, msg_error@ha
addi 4, 4, msg_error@l
li 5, len_error
sc
# Mark the error
li 22, 1
# Safe fall back
blr # PERF_SAMPLE_BRANCH_ANY_RET
sw_3_1_2:
# Print "Test: sw_3_1_2"
li 0, 4
li 3, 1
lis 4, msg_3_1_2@ha
addi 4, 4, msg_3_1_2@l
li 5, len_3_1_2
sc
li 23, 0
# Test the condition and return
li 21, 10
cmpi 0, 21, 20
bclr 12, 0 # PERF_SAMPLE_BRANCH_ANY_RET |
PERF_SAMPLE_BRANCH_COND
# Should not have come here
li 0, 4
li 3, 1
lis 4, msg_error@ha
addi 4, 4, msg_error@l
li 5, len_error
sc
# Mark the error
li 23, 1
# Safe fall back
blr # PERF_SAMPLE_BRANCH_ANY_RET
sw_3_1_3:
# Print "Test: sw_3_1_3"
li 0, 4
li 3, 1
lis 4, msg_3_1_3@ha
addi 4, 4, msg_3_1_3@l
li 5, len_3_1_3
sc
li 24, 0
# Test the condition and return
li 21, 10
cmpi 0, 21, 5
bclr 12, 1 # PERF_SAMPLE_BRANCH_ANY_RET |
PERF_SAMPLE_BRANCH_COND
# Mark the error
li 24, 1
# Should not have come here
li 0, 4
li 3, 1
lis 4, msg_error@ha
addi 4, 4, msg_error@l
li 5, len_error
sc
# Safe fall back
blr # PERF_SAMPLE_BRANCH_ANY_RET
success_3_1_1:
li 0, 4
li 3, 1
lis 4, hw_3_1_1_passed@ha
addi 4, 4, hw_3_1_1_passed@l
li 5, len_hw_3_1_1_passed
sc
blr
success_3_1_2:
li 0, 4
li 3, 1
lis 4, hw_3_1_2_passed@ha
addi 4, 4, hw_3_1_2_passed@l
li 5, len_hw_3_1_2_passed
sc
blr
success_3_1_3:
li 0, 4
li 3, 1
lis 4, hw_3_1_3_passed@ha
addi 4, 4, hw_3_1_3_passed@l
li 5, len_hw_3_1_3_passed
sc
blr
sw_3_1:
# Save LR
mflr 26
# Print "Test: sw_3_1"
li 0, 4
li 3, 1
lis 4, msg_3_1@ha
addi 4, 4, msg_3_1@l
li 5, len_3_1
sc
# Equal comparison condition
bl sw_3_1_1 # PERF_SAMPLE_BRANCH_ANY_CALL
cmpi 0, 22, 0
bcl 12, 2, success_3_1_1 # PERF_SAMPLE_BRANCH_ANY_CALL |
PERF_SAMPLE_BRANCH_COND
# LT comparison condition
bl sw_3_1_2 # PERF_SAMPLE_BRANCH_ANY_CALL
cmpi 0, 23, 0
bcl 12, 2, success_3_1_2 # PERF_SAMPLE_BRANCH_ANY_CALL |
PERF_SAMPLE_BRANCH_COND
# GT comparison condition
bl sw_3_1_3 # PERF_SAMPLE_BRANCH_ANY_CALL
cmpi 0, 24, 0
bcl 12, 2, success_3_1_3 # PERF_SAMPLE_BRANCH_ANY_CALL |
PERF_SAMPLE_BRANCH_COND
mtlr 26
blr # PERF_SAMPLE_BRANCH_ANY_RET
sw_3_2:
# Print "Test: sw_3_2"
li 0, 4
li 3, 1
lis 4, msg_3_2@ha
addi 4, 4, msg_3_2@l
li 5, len_3_1
sc
# FIXME: Anything more here ?
blr # PERF_SAMPLE_BRANCH_ANY_RET
# Indirect call tests
# CTR
ctr_addr:
# Print "bcctr taken"
li 0, 4
li 3, 1
lis 4, hw_4_1_passed@ha
addi 4, 4, hw_4_1_passed@l
li 5, len_hw_4_1_passed
sc
blr # PERF_SAMPLE_BRANCH_ANY_RET
sw_4_1:
# Save LR
mflr 26
# Print "sw_4_1 called"
li 0, 4
li 3, 1
lis 4, msg_4_1@ha
addi 4, 4, msg_4_1@l
li 5, len_4_1
sc
# Save address in CTR
lis 20, ctr_addr@ha
addi 20, 20, ctr_addr@l
mtctr 20
# Compare and jump to CTR
li 21, 10
cmpi 0, 21, 10
bcctrl 12, 4*cr0+2 # PERF_SAMPLE_BRANCH_IND_CALL
mtlr 26
blr # PERF_SAMPLE_BRANCH_ANY_RET
# LR
lr_addr:
# Print "bclrl taken"
li 0, 4
li 3, 1
lis 4, hw_4_2_passed@ha
addi 4, 4, hw_4_2_passed@l
li 5, len_hw_4_2_passed
sc
blr # PERF_SAMPLE_BRANCH_ANY_RET
sw_4_2:
# Save LR
mflr 26
# Print "Test: sw_4_2"
li 0, 4
li 3, 1
lis 4, msg_4_2@ha
addi 4, 4, msg_4_2@l
li 5, len_4_2
sc
# Save address in LR
lis 20, lr_addr@ha
addi 20, 20, lr_addr@l
mtlr 20
# Compare and jump to CTR
li 21, 10
cmpi 0, 21, 10
bclrl 12, 4*cr0+2 # PERF_SAMPLE_BRANCH_IND_CALL
# Restore LR
mtlr 26
blr # PERF_SAMPLE_BRANCH_ANY_RET
callme:
# Save LR
mflr 25
# Print "Branch filter Test"
li 0, 4
li 3, 1
lis 4, msg@ha
addi 4, 4, msg@l
li 5, len
sc
# PERF_SAMPLE_BRANCH_ANY_CALL
bl hw_1_1 # PERF_SAMPLE_BRANCH_ANY_CALL
bl hw_1_2 # PERF_SAMPLE_BRANCH_ANY_CALL
# PERF_SAMPLE_BRANCH_COND
bl hw_2_1 # PERF_SAMPLE_BRANCH_ANY_CALL
bl hw_2_2 # PERF_SAMPLE_BRANCH_ANY_CALL
# PERF_SAMPLE_BRANCH_ANY_RET
bl sw_3_1 # PERF_SAMPLE_BRANCH_ANY_CALL
bl sw_3_2 # PERF_SAMPLE_BRANCH_ANY_CALL
# PERF_SAMPLE_BRANCH_IND_CALL
bl sw_4_1 # PERF_SAMPLE_BRANCH_ANY_CALL
bl sw_4_2 # PERF_SAMPLE_BRANCH_ANY_CALL
# Restore LR
mtlr 25
blr # PERF_SAMPLE_BRANCH_ANY_RET
--------------------------------------------------------------------
Anshuman Khandual (10):
perf: New conditional branch filter criteria in branch stack sampling
powerpc, perf: Enable conditional branch filter for POWER8
perf, tool: Conditional branch filter 'cond' added to perf record
x86, perf: Add conditional branch filtering support
perf, documentation: Description for conditional branch filter
powerpc, perf: Change the name of HW PMU branch filter tracking variable
powerpc, lib: Add new branch instruction analysis support functions
powerpc, perf: Enable SW filtering in branch stack sampling framework
power8, perf: Change BHRB branch filter configuration
powerpc, perf: Cleanup SW branch filter list look up
arch/powerpc/include/asm/code-patching.h | 30 ++++
arch/powerpc/include/asm/perf_event_server.h | 6 +-
arch/powerpc/lib/code-patching.c | 54 +++++-
arch/powerpc/perf/core-book3s.c | 260 +++++++++++++++++++++++++--
arch/powerpc/perf/power8-pmu.c | 75 ++++++--
arch/x86/kernel/cpu/perf_event_intel_lbr.c | 5 +
include/uapi/linux/perf_event.h | 3 +-
tools/perf/Documentation/perf-record.txt | 3 +-
tools/perf/builtin-record.c | 1 +
9 files changed, 404 insertions(+), 33 deletions(-)
--
1.7.11.7
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