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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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23c296fb7e
Add frequency, mperf, aperf and tsc in the trace. This can be used to debug and tune the performance of AMD P-state driver. Use the time difference between amd_pstate_update to calculate CPU frequency. There could be sleep in arch_freq_get_on_cpu, so do not use it here. Signed-off-by: Jinzhou Su <Jinzhou.Su@amd.com> Co-developed-by: Huang Rui <ray.huang@amd.com> Signed-off-by: Huang Rui <ray.huang@amd.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
98 lines
2.3 KiB
C
98 lines
2.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* amd-pstate-trace.h - AMD Processor P-state Frequency Driver Tracer
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*
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* Copyright (C) 2021 Advanced Micro Devices, Inc. All Rights Reserved.
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*
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* Author: Huang Rui <ray.huang@amd.com>
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*/
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#if !defined(_AMD_PSTATE_TRACE_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _AMD_PSTATE_TRACE_H
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#include <linux/cpufreq.h>
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#include <linux/tracepoint.h>
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#include <linux/trace_events.h>
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#undef TRACE_SYSTEM
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#define TRACE_SYSTEM amd_cpu
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#undef TRACE_INCLUDE_FILE
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#define TRACE_INCLUDE_FILE amd-pstate-trace
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#define TPS(x) tracepoint_string(x)
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TRACE_EVENT(amd_pstate_perf,
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TP_PROTO(unsigned long min_perf,
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unsigned long target_perf,
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unsigned long capacity,
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u64 freq,
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u64 mperf,
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u64 aperf,
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u64 tsc,
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unsigned int cpu_id,
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bool changed,
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bool fast_switch
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),
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TP_ARGS(min_perf,
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target_perf,
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capacity,
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freq,
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mperf,
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aperf,
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tsc,
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cpu_id,
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changed,
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fast_switch
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),
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TP_STRUCT__entry(
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__field(unsigned long, min_perf)
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__field(unsigned long, target_perf)
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__field(unsigned long, capacity)
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__field(unsigned long long, freq)
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__field(unsigned long long, mperf)
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__field(unsigned long long, aperf)
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__field(unsigned long long, tsc)
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__field(unsigned int, cpu_id)
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__field(bool, changed)
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__field(bool, fast_switch)
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),
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TP_fast_assign(
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__entry->min_perf = min_perf;
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__entry->target_perf = target_perf;
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__entry->capacity = capacity;
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__entry->freq = freq;
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__entry->mperf = mperf;
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__entry->aperf = aperf;
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__entry->tsc = tsc;
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__entry->cpu_id = cpu_id;
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__entry->changed = changed;
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__entry->fast_switch = fast_switch;
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),
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TP_printk("amd_min_perf=%lu amd_des_perf=%lu amd_max_perf=%lu freq=%llu mperf=%llu aperf=%llu tsc=%llu cpu_id=%u changed=%s fast_switch=%s",
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(unsigned long)__entry->min_perf,
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(unsigned long)__entry->target_perf,
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(unsigned long)__entry->capacity,
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(unsigned long long)__entry->freq,
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(unsigned long long)__entry->mperf,
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(unsigned long long)__entry->aperf,
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(unsigned long long)__entry->tsc,
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(unsigned int)__entry->cpu_id,
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(__entry->changed) ? "true" : "false",
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(__entry->fast_switch) ? "true" : "false"
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)
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);
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#endif /* _AMD_PSTATE_TRACE_H */
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/* This part must be outside protection */
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#undef TRACE_INCLUDE_PATH
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#define TRACE_INCLUDE_PATH .
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#include <trace/define_trace.h>
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