[PATCH V3 0/3] perf/powerpc:Add ability to sample intr machine state in powerpc

Anju T
2015-11-03T06:10:33Z

This short patch series adds the ability to sample the interrupted
machine state for each hardware sample.

To test this patchset,
Eg:

$perf record -I ls // record machine state at interrupt
$perf script -D //read the perf.data file

Sample output obtained for this patchset/ output looks like as follows:

331557004666 0x1988 [0x188]: PERF_RECORD_SAMPLE(IP, 0x1): 4807/4807: 0xc0000000001ddf60 period: 1 addr: 0
... intr regs: mask 0x7ffffffffff ABI 64-bit
.... gpr0 0xc0000000001e6a74
.... gpr1 0xc0000000ff33b9a0
.... gpr2 0xc000000001523000
.... gpr3 0xc000000ffa9deb60
.... gpr4 0xc0000000ff971e00
.... gpr5 0x4d32564532
.... gpr6 0x1e000000
.... gpr7 0x0
.... gpr8 0x0
.... gpr9 0x0
.... gpr10 0x1
.... gpr11 0x0
.... gpr12 0x24022822
.... gpr13 0xc00000000feeaf80
.... gpr14 0x0
.... gpr15 0xc0000000fbc21000
.... gpr16 0x0
.... gpr17 0xc000000ffa9c5000
.... gpr18 0xc0000000ff33b8a0
.... gpr19 0xc000000001523000
.... gpr20 0xc0000000000a097c
.... gpr21 0xc000000fcac65600
.... gpr22 0xc0000000001e55a8
.... gpr23 0xc000000001523000
.... gpr24 0xc0000000ff33b850
.... gpr25 0xc000000fcac65600
.... gpr26 0xc000001e4b378210
.... gpr27 0xfffffffffffffead
.... gpr28 0x100000000
.... gpr29 0xc000000fcac65600
.... gpr30 0x1
.... gpr31 0x0
.... nip 0xc0000000001ddf68
.... msr 0x9000000000009032
.... orig_r3 0xc0000000001e5fcc
.... ctr 0xc00000000009e1b0
.... link 0xc0000000001e6a74
.... xer 0x0
.... ccr 0x84022882
.... softe 0x0
.... trap 0xf01
.... dar 0x0
.... dsisr 0xf00040060000004
... thread: :4807:4807
...... dso: /root/.debug/.build-id/1c/011201a1082e91b8449e6dd528f224d7a16535
:4807 4807 331.557004: 1 cycles: c0000000001ddf60 .perf_ctx_unlock (/boot/vmlinux)

0x1b10 [0x188]: event: 9

Changes from V2:

- tools/perf/config/Makefile is moved to the patch tools/perf.
- The patchset is reordered.
- perf_regs_load() function is used for the dwarf unwind test.Since it is not required here,
it is removed from tools/perf/arch/powerpc/include/perf_regs.h
- PERF_REGS_POWERPC_RESULT is removed.

Anju T (3):
perf/powerpc:add ability to sample intr machine state in power
perf/powerpc :add support for sampling intr machine state
tools/perf:Map the ID values with register names

arch/powerpc/Kconfig | 1 +
arch/powerpc/include/uapi/asm/perf_regs.h | 54 +++++++++++++
arch/powerpc/perf/Makefile | 2 +
arch/powerpc/perf/perf_regs.c | 92 ++++++++++++++++++++++
tools/perf/arch/powerpc/include/perf_regs.h | 114 ++++++++++++++++++++++++++++
tools/perf/config/Makefile | 5 ++
6 files changed, 268 insertions(+)
create mode 100644 arch/powerpc/include/uapi/asm/perf_regs.h
create mode 100644 arch/powerpc/perf/perf_regs.c
create mode 100644 tools/perf/arch/powerpc/include/perf_regs.h

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2.1.0