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32 lines
813 B
C
32 lines
813 B
C
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// SPDX-License-Identifier: GPL-2.0
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#include <stdio.h>
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#include <stdlib.h>
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#include "util/evsel.h"
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#include "util/env.h"
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#include "linux/string.h"
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void arch_evsel__set_sample_weight(struct evsel *evsel)
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{
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evsel__set_sample_bit(evsel, WEIGHT_STRUCT);
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}
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void arch_evsel__fixup_new_cycles(struct perf_event_attr *attr)
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{
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struct perf_env env = { .total_mem = 0, } ;
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if (!perf_env__cpuid(&env))
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return;
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/*
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* On AMD, precise cycles event sampling internally uses IBS pmu.
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* But IBS does not have filtering capabilities and perf by default
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* sets exclude_guest = 1. This makes IBS pmu event init fail and
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* thus perf ends up doing non-precise sampling. Avoid it by clearing
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* exclude_guest.
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*/
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if (env.cpuid && strstarts(env.cpuid, "AuthenticAMD"))
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attr->exclude_guest = 0;
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free(env.cpuid);
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}
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