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to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
50 lines
2.0 KiB
TableGen
50 lines
2.0 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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// 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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