52 lines
2.1 KiB
TableGen
52 lines
2.1 KiB
TableGen
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//===- 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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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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}
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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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