perf record: Add remaining branch filters: "no_cycles", "no_flags" & "hw_index"
This adds all remaining branch filters i.e "no_cycles", "no_flags" and "hw_index". While here, also updates the documentation. Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com> Cc: James Clark <james.clark@arm.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lore.kernel.org/lkml/20221205064443.533587-1-anshuman.khandual@arm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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@ -388,6 +388,7 @@ following filters are defined:
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- any_call: any function call or system call
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- any_ret: any function return or system call return
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- ind_call: any indirect branch
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- ind_jmp: any indirect jump
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- call: direct calls, including far (to/from kernel) calls
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- u: only when the branch target is at the user level
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- k: only when the branch target is in the kernel
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@ -396,6 +397,10 @@ following filters are defined:
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- no_tx: only when the target is not in a hardware transaction
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- abort_tx: only when the target is a hardware transaction abort
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- cond: conditional branches
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- call_stack: save call stack
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- no_flags: don't save branch flags e.g prediction, misprediction etc
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- no_cycles: don't save branch cycles
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- hw_index: save branch hardware index
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- save_type: save branch type during sampling in case binary is not available later
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For the platforms with Intel Arch LBR support (12th-Gen+ client or
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4th-Gen Xeon+ server), the save branch type is unconditionally enabled
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@ -30,8 +30,11 @@ static const struct branch_mode branch_modes[] = {
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BRANCH_OPT("cond", PERF_SAMPLE_BRANCH_COND),
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BRANCH_OPT("ind_jmp", PERF_SAMPLE_BRANCH_IND_JUMP),
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BRANCH_OPT("call", PERF_SAMPLE_BRANCH_CALL),
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BRANCH_OPT("no_flags", PERF_SAMPLE_BRANCH_NO_FLAGS),
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BRANCH_OPT("no_cycles", PERF_SAMPLE_BRANCH_NO_CYCLES),
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BRANCH_OPT("save_type", PERF_SAMPLE_BRANCH_TYPE_SAVE),
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BRANCH_OPT("stack", PERF_SAMPLE_BRANCH_CALL_STACK),
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BRANCH_OPT("hw_index", PERF_SAMPLE_BRANCH_HW_INDEX),
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BRANCH_OPT("priv", PERF_SAMPLE_BRANCH_PRIV_SAVE),
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BRANCH_END
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};
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