6024e5c395
clang 20.0.0 (based on r547379) from build 12806354. Bug: http://b/379133546 Test: N/A Change-Id: I2eb8938af55d809de674be63cb30cf27e801862b Upstream-Commit: ad834e67b1105d15ef907f6255d4c96e8e733f57
82 lines
3.3 KiB
TableGen
82 lines
3.3 KiB
TableGen
//===- TargetPfmCounters.td - Target Pfm Counters -*- tablegen ----------*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines the target-independent interfaces for performance counters.
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//
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//===----------------------------------------------------------------------===//
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// Definition of a hardware counters from libpfm identifiers.
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class PfmCounter<string counter> {
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// The name of the counter that measures events.
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// The name can be "some_counter + some_other_counter", in which case the
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// measured value is the sum of events on these counters.
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string Counter = counter;
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}
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// Issue counters can be tied to a ProcResource
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class PfmIssueCounter<string resource_name, string counter>
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: PfmCounter<counter> {
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// The name of the ProcResource on which uops are issued. This is used by
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// llvm-exegesis to compare measurements with values in the SchedModels.
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// If the CPU has a sched model, this should correspond to the name of a
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// ProcResource.
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string ResourceName = resource_name;
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}
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// Definition of a validation event. A validation event represents a specific
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// event that can be measured using performance counters that is interesting
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// in regard to the snippet state.
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class ValidationEvent <int event_number> {
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int EventNumber = event_number;
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}
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// TableGen names for events defined in `llvm::exegesis::ValidationEvent`.
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def InstructionRetired : ValidationEvent<0>;
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def L1DCacheLoadMiss : ValidationEvent<1>;
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def L1DCacheStoreMiss : ValidationEvent<2>;
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def L1ICacheLoadMiss : ValidationEvent<3>;
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def DataTLBLoadMiss : ValidationEvent<4>;
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def DataTLBStoreMiss : ValidationEvent<5>;
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def InstructionTLBLoadMiss : ValidationEvent<6>;
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def BranchPredictionMiss : ValidationEvent<7>;
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// PfmValidationCounter provides a mapping between the events that are
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// are interesting in regards to the snippet execution environment and
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// a concrete performance counter name that can be looked up in libpfm.
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class PfmValidationCounter<ValidationEvent event_type, string counter>
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: PfmCounter<counter> {
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// The name of the event that the validation counter detects.
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ValidationEvent EventType = event_type;
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}
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def NoPfmCounter : PfmCounter <""> {}
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// Set of PfmCounters for measuring sched model characteristics.
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class ProcPfmCounters {
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// Processors can define how to measure cycles by defining a CycleCounter.
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PfmCounter CycleCounter = NoPfmCounter;
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// Processors can define how to measure uops by defining a UopsCounter.
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PfmCounter UopsCounter = NoPfmCounter;
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// Processors can define how to measure issued uops by defining IssueCounters.
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list<PfmIssueCounter> IssueCounters = [];
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// Processor can list mappings between validation events and real counters
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// to measure the specified events.
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list<PfmValidationCounter> ValidationCounters = [];
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}
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// A binding of a set of counters to a CPU.
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class PfmCountersBinding<string cpu_name, ProcPfmCounters counters> {
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string CpuName = cpu_name;
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ProcPfmCounters Counters = counters;
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}
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// Declares the default binding for unbound CPUs for the target.
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class PfmCountersDefaultBinding<ProcPfmCounters counters>
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: PfmCountersBinding<"", counters> {}
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