[PATCH V11 0/4]perf/powerpc: Add ability to sample intr machine state in powerpc
Arnaldo Carvalho de Melo
acme at redhat.com
Wed Apr 20 13:57:54 AEST 2016
Em Mon, Apr 18, 2016 at 03:17:11PM +0530, Anju T escreveu:
> On Saturday 20 February 2016 10:32 AM, Anju T wrote:
> >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? # list supported registers
> >
> >output:
> >available registers: r0 r1 r2 r3 r4 r5 r6 r7 r8 r9 r10 r11 r12 r13 r14 r15 r16 r17 r18 r19 r20 r21 r22 r23 r24 r25 r26 r27 r28 r29 r30 r31 nip msr orig_r3 ctr link xer ccr softe trap dar dsisr
> >
> > usage: perf record [<options>] [<command>]
> > or: perf record [<options>] -- <command> [<options>]
> >
> > -I, --intr-regs[=<any register>]
> > sample selected machine registers on interrupt, use -I ? to list register names
> >
> >
> >$ 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:
> >
> >496768515470 0x1988 [0x188]: PERF_RECORD_SAMPLE(IP, 0x1): 4522/4522: 0xc0000000001e538c period: 1 addr: 0
> >... intr regs: mask 0x7ffffffffff ABI 64-bit
> >.... r0 0xc0000000001e5e34
> >.... r1 0xc000000fe733f9a0
> >.... r2 0xc000000001523100
> >.... r3 0xc000000ffaadeb60
> >.... r4 0xc000000003456800
> >.... r5 0x73a9b5e000
> >.... r6 0x1e000000
> >.... r7 0x0
> >.... r8 0x0
> >.... r9 0x0
> >.... r10 0x1
> >.... r11 0x0
> >.... r12 0x24022822
> >.... r13 0xc00000000feec180
> >.... r14 0x0
> >.... r15 0xc000001e4be18800
> >.... r16 0x0
> >.... r17 0xc000000ffaac5000
> >.... r18 0xc000000fe733f8a0
> >.... r19 0xc000000001523100
> >.... r20 0xc00000000009fd1c
> >.... r21 0xc000000fcaa69000
> >.... r22 0xc0000000001e4968
> >.... r23 0xc000000001523100
> >.... r24 0xc000000fe733f850
> >.... r25 0xc000000fcaa69000
> >.... r26 0xc000000003b8fcf0
> >.... r27 0xfffffffffffffead
> >.... r28 0x0
> >.... r29 0xc000000fcaa69000
> >.... r30 0x1
> >.... r31 0x0
> >.... nip 0xc0000000001dd320
> >.... msr 0x9000000000009032
> >.... orig_r3 0xc0000000001e538c
> >.... ctr 0xc00000000009d550
> >.... link 0xc0000000001e5e34
> >.... xer 0x0
> >.... ccr 0x84022882
> >.... softe 0x0
> >.... trap 0xf01
> >.... dar 0x0
> >.... dsisr 0xf00040060000004
> > ... thread: :4522:4522
> > ...... dso: /root/.debug/.build-id/b0/ef11b1a1629e62ac9de75199117ee5ef9469e9
> > :4522 4522 496.768515: 1 cycles: c0000000001e538c .perf_event_context_sched_in (/boot/vmlinux)
> >
> >
> >
> >Changes from v10:
> >
> >- Included SOFTE as suggested by mpe
> >- The name of registers displayed is changed from
> > gpr* to r* also the macro names changed from
> > PERF_REG_POWERPC_GPR* to PERF_REG_POWERPC_R*.
> >- The conflict in returning the ABI is resolved.
> >- #define PERF_REG_SP is again changed to PERF_REG_POWERPC_R1
> >- Comment in tools/perf/config/Makefile is updated.
> >- removed the "Reviewed-By" tag as the patch has logic changes.
> >
> >
> >Changes from V9:
> >
> >- Changed the name displayed for link register from "lnk" to "link" in
> > tools/perf/arch/powerpc/include/perf_regs.h
> >
> >changes from V8:
> >
> >- Corrected the indentation issue in the Makefile mentioned in 3rd patch
> >
> >Changes from V7:
> >
> >- Addressed the new line issue in 3rd patch.
> >
> >Changes from V6:
> >
> >- Corrected the typo in patch tools/perf: Map the ID values with register names.
> > ie #define PERF_REG_SP PERF_REG_POWERPC_R1 should be #define PERF_REG_SP PERF_REG_POWERPC_GPR1
> >
> >
> >Changes from V5:
> >
> >- Enabled perf_sample_regs_user also in this patch set.Functions added in
> > arch/powerpc/perf/perf_regs.c
> >- Added Maddy's patch to this patchset for enabling -I? option which will
> > list the supported register names.
> >
> >
> >Changes from V4:
> >
> >- Removed the softe and MQ from all patches
> >- Switch case is replaced with an array in the 3rd patch
> >
> >Changes from V3:
> >
> >- Addressed the comments by Sukadev regarding the nits in the descriptions.
> >- Modified the subject of first patch.
> >- Included the sample output in the 3rd patch also.
> >
> >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.
> >
> >Changes from V1:
> >
> >- Solved the name missmatch issue in the from and signed-off field of the patch series.
> >- Added necessary comments in the 3rd patch ie perf/powerpc ,as suggested by Maddy.
> >
> >
> >
> >Anju T (3):
> > perf/powerpc: assign an id to each powerpc register
> > perf/powerpc: add support for sampling intr machine state
> > tools/perf: Map the ID values with register names
> >
> >Madhavan Srinivasan (1):
> > tool/perf: Add sample_reg_mask to include all perf_regs regs
> >
> >
> > arch/powerpc/Kconfig | 1 +
> > arch/powerpc/include/uapi/asm/perf_regs.h | 50 ++++++++++++++++
> > arch/powerpc/perf/Makefile | 1 +
> > arch/powerpc/perf/perf_regs.c | 91 +++++++++++++++++++++++++++++
> > tools/perf/arch/powerpc/include/perf_regs.h | 69 ++++++++++++++++++++++
> > tools/perf/arch/powerpc/util/Build | 1 +
> > tools/perf/arch/powerpc/util/perf_regs.c | 49 ++++++++++++++++
> > tools/perf/config/Makefile | 5 ++
> > 8 files changed, 267 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
> > create mode 100644 tools/perf/arch/powerpc/util/perf_regs.c
> >
>
> Hi,
>
> Can this be taken into the next tree?
Even the bits in tools/perf/ are arch specific, so I guess this goes via
the powerpc tree? Michael?
- Arnaldo
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