Messages in this thread Patch in this message | | | From | Arnaldo Carvalho de Melo <> | Subject | [PATCH 12/73] perf tools x86: Add support for recording and printing XMM registers | Date | Fri, 17 May 2019 16:35:10 -0300 |
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From: Andi Kleen <ak@linux.intel.com>
Icelake and later platforms support collecting XMM registers with PEBS event.
Add support for 'perf script' to dump them, and support for the register parser in 'perf record -I=' ... to configure them.
For now they are just printed in hex, we could potentially later add other formats too.
Committer testing:
Before:
# perf record -IXMM0 Warning: unknown register XMM0, check man page or run 'perf record -I?'
Usage: perf record [<options>] [<command>] or: perf record [<options>] -- <command> [<options>]
# # perf record -I? available registers: AX BX CX DX SI DI BP SP IP FLAGS CS SS R8 R9 R10 R11 R12 R13 R14 R15
Usage: perf record [<options>] [<command>] or: perf record [<options>] -- <command> [<options>] #
After:
# perf record -IXMM0 Error: The sys_perf_event_open() syscall returned with 22 (Invalid argument) for event (cycles). /bin/dmesg | grep -i perf may provide additional information.
# # perf record -I? available registers: AX BX CX DX SI DI BP SP IP FLAGS CS SS R8 R9 R10 R11 R12 R13 R14 R15 XMM0 XMM1 XMM2 XMM3 XMM4 XMM5 XMM6 XMM7 XMM8 XMM9 XMM10 XMM11 XMM12 XMM13 XMM14 XMM15
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 #
More work is needed to, when faced with such error, warn the user that that register is not available on the running platform.
Signed-off-by: Andi Kleen <ak@linux.intel.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20190506141926.13659-1-kan.liang@linux.intel.com Signed-off-by: Kan Liang <kan.liang@linux.intel.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> --- tools/perf/arch/x86/include/perf_regs.h | 25 +++++++++++++++++++++++-- tools/perf/arch/x86/util/perf_regs.c | 16 ++++++++++++++++ tools/perf/util/perf_regs.h | 1 + 3 files changed, 40 insertions(+), 2 deletions(-)
diff --git a/tools/perf/arch/x86/include/perf_regs.h b/tools/perf/arch/x86/include/perf_regs.h index 7f6d538f8a89..b7321337d100 100644 --- a/tools/perf/arch/x86/include/perf_regs.h +++ b/tools/perf/arch/x86/include/perf_regs.h @@ -8,9 +8,9 @@ void perf_regs_load(u64 *regs); +#define PERF_REGS_MAX PERF_REG_X86_XMM_MAX #ifndef HAVE_ARCH_X86_64_SUPPORT #define PERF_REGS_MASK ((1ULL << PERF_REG_X86_32_MAX) - 1) -#define PERF_REGS_MAX PERF_REG_X86_32_MAX #define PERF_SAMPLE_REGS_ABI PERF_SAMPLE_REGS_ABI_32 #else #define REG_NOSUPPORT ((1ULL << PERF_REG_X86_DS) | \ @@ -18,7 +18,6 @@ void perf_regs_load(u64 *regs); (1ULL << PERF_REG_X86_FS) | \ (1ULL << PERF_REG_X86_GS)) #define PERF_REGS_MASK (((1ULL << PERF_REG_X86_64_MAX) - 1) & ~REG_NOSUPPORT) -#define PERF_REGS_MAX PERF_REG_X86_64_MAX #define PERF_SAMPLE_REGS_ABI PERF_SAMPLE_REGS_ABI_64 #endif #define PERF_REG_IP PERF_REG_X86_IP @@ -77,6 +76,28 @@ static inline const char *perf_reg_name(int id) case PERF_REG_X86_R15: return "R15"; #endif /* HAVE_ARCH_X86_64_SUPPORT */ + +#define XMM(x) \ + case PERF_REG_X86_XMM ## x: \ + case PERF_REG_X86_XMM ## x + 1: \ + return "XMM" #x; + XMM(0) + XMM(1) + XMM(2) + XMM(3) + XMM(4) + XMM(5) + XMM(6) + XMM(7) + XMM(8) + XMM(9) + XMM(10) + XMM(11) + XMM(12) + XMM(13) + XMM(14) + XMM(15) +#undef XMM default: return NULL; } diff --git a/tools/perf/arch/x86/util/perf_regs.c b/tools/perf/arch/x86/util/perf_regs.c index fead6b3b4206..71d7604dbf0b 100644 --- a/tools/perf/arch/x86/util/perf_regs.c +++ b/tools/perf/arch/x86/util/perf_regs.c @@ -31,6 +31,22 @@ const struct sample_reg sample_reg_masks[] = { SMPL_REG(R14, PERF_REG_X86_R14), SMPL_REG(R15, PERF_REG_X86_R15), #endif + SMPL_REG2(XMM0, PERF_REG_X86_XMM0), + SMPL_REG2(XMM1, PERF_REG_X86_XMM1), + SMPL_REG2(XMM2, PERF_REG_X86_XMM2), + SMPL_REG2(XMM3, PERF_REG_X86_XMM3), + SMPL_REG2(XMM4, PERF_REG_X86_XMM4), + SMPL_REG2(XMM5, PERF_REG_X86_XMM5), + SMPL_REG2(XMM6, PERF_REG_X86_XMM6), + SMPL_REG2(XMM7, PERF_REG_X86_XMM7), + SMPL_REG2(XMM8, PERF_REG_X86_XMM8), + SMPL_REG2(XMM9, PERF_REG_X86_XMM9), + SMPL_REG2(XMM10, PERF_REG_X86_XMM10), + SMPL_REG2(XMM11, PERF_REG_X86_XMM11), + SMPL_REG2(XMM12, PERF_REG_X86_XMM12), + SMPL_REG2(XMM13, PERF_REG_X86_XMM13), + SMPL_REG2(XMM14, PERF_REG_X86_XMM14), + SMPL_REG2(XMM15, PERF_REG_X86_XMM15), SMPL_REG_END }; diff --git a/tools/perf/util/perf_regs.h b/tools/perf/util/perf_regs.h index c9319f8d17a6..1a15a4bfc28d 100644 --- a/tools/perf/util/perf_regs.h +++ b/tools/perf/util/perf_regs.h @@ -12,6 +12,7 @@ struct sample_reg { uint64_t mask; }; #define SMPL_REG(n, b) { .name = #n, .mask = 1ULL << (b) } +#define SMPL_REG2(n, b) { .name = #n, .mask = 3ULL << (b) } #define SMPL_REG_END { .name = NULL } extern const struct sample_reg sample_reg_masks[]; -- 2.20.1
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