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fff3957969
For MSR systems the EPP value is in the same register as perf targets and so divding them into two separate MSR writes is wasteful. In msr_update_perf(), update both EPP and perf values in one write to MSR_AMD_CPPC_REQ, and cache them if successful. To accomplish this plumb the EPP value into the update_perf call and modify all its callers to check the return value. As this unifies calls, ensure that the MSR write is necessary before flushing a write out. Also drop the comparison from the passive flow tracing. Reviewed-by: Gautham R. Shenoy <gautham.shenoy@amd.com> Link: https://lore.kernel.org/r/20241209185248.16301-13-mario.limonciello@amd.com Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
138 lines
3.1 KiB
C
138 lines
3.1 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 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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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, 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->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 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->fast_switch) ? "true" : "false"
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)
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);
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TRACE_EVENT(amd_pstate_epp_perf,
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TP_PROTO(unsigned int cpu_id,
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unsigned int highest_perf,
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unsigned int epp,
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unsigned int min_perf,
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unsigned int max_perf,
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bool boost
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),
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TP_ARGS(cpu_id,
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highest_perf,
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epp,
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min_perf,
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max_perf,
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boost),
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TP_STRUCT__entry(
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__field(unsigned int, cpu_id)
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__field(unsigned int, highest_perf)
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__field(unsigned int, epp)
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__field(unsigned int, min_perf)
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__field(unsigned int, max_perf)
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__field(bool, boost)
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),
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TP_fast_assign(
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__entry->cpu_id = cpu_id;
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__entry->highest_perf = highest_perf;
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__entry->epp = epp;
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__entry->min_perf = min_perf;
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__entry->max_perf = max_perf;
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__entry->boost = boost;
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),
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TP_printk("cpu%u: [%u<->%u]/%u, epp=%u, boost=%u",
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(unsigned int)__entry->cpu_id,
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(unsigned int)__entry->min_perf,
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(unsigned int)__entry->max_perf,
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(unsigned int)__entry->highest_perf,
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(unsigned int)__entry->epp,
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(bool)__entry->boost
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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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