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devfreq: nvhost_podgov: implementation cleanup
Previous implementation lacks of documentation and it's hard to understand the effect of changing specific tunable parameter. Revise the implementation so that the scaling behavior is somehow aligned with the tegra_wmark governor supported by the actmon. The only different is that nvhost_podgov governor is polling-based DFS algorithm and it maintaines the moving average load in the governor instead of hardware itself. Bug 4892068 Change-Id: I033cb1359a484d4c9433fa4f2e7a99c42cb636b3 Signed-off-by: Johnny Liu <johnliu@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3315446 GVS: buildbot_gerritrpt <buildbot_gerritrpt@nvidia.com> Reviewed-by: Rajesh Devaraj <rdevaraj@nvidia.com>
This commit is contained in:
Johnny Liu
File diff suppressed because it is too large
Load Diff
10
include/linux/devfreq/nvhost_podgov.h
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10
include/linux/devfreq/nvhost_podgov.h
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@@ -0,0 +1,10 @@
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/* SPDX-License-Identifier: GPL-2.0-only
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* SPDX-FileCopyrightText: Copyright (c) 2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
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*/
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#ifndef DEVFREQ_NVHOST_PODGOV_H
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#define DEVFREQ_NVHOST_PODGOV_H
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#define DEVFREQ_GOV_NVHOST_PODGOV "nvhost_podgov"
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#endif /* DEVFREQ_NVHOST_PODGOV_H */
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@@ -1,250 +0,0 @@
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/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (c) 2013-2023, NVIDIA Corporation. All rights reserved.
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*
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* Nvhost event logging to ftrace.
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*/
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#undef TRACE_SYSTEM
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#define TRACE_SYSTEM nvhost_podgov
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#if !defined(_TRACE_NVHOST_PODGOV_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_NVHOST_PODGOV_H
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#include <linux/ktime.h>
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#include <linux/tracepoint.h>
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#include <linux/device.h>
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DECLARE_EVENT_CLASS(podgov_update_freq,
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TP_PROTO(struct device *dev, unsigned long old_freq, unsigned long new_freq),
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TP_ARGS(dev, old_freq, new_freq),
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TP_STRUCT__entry(
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__field(struct device *, dev)
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__field(unsigned long, old_freq)
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__field(unsigned long, new_freq)
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),
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TP_fast_assign(
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__entry->dev = dev;
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__entry->old_freq = old_freq;
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__entry->new_freq = new_freq;
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),
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TP_printk("name=%s, old_freq=%lu, new_freq=%lu",
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dev_name(__entry->dev), __entry->old_freq, __entry->new_freq)
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);
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DEFINE_EVENT(podgov_update_freq, podgov_do_scale,
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TP_PROTO(struct device *dev, unsigned long old_freq, unsigned long new_freq),
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TP_ARGS(dev, old_freq, new_freq)
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);
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DEFINE_EVENT(podgov_update_freq, podgov_scaling_state_check,
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TP_PROTO(struct device *dev, unsigned long old_freq, unsigned long new_freq),
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TP_ARGS(dev, old_freq, new_freq)
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);
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DEFINE_EVENT(podgov_update_freq, podgov_estimate_freq,
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TP_PROTO(struct device *dev, unsigned long old_freq, unsigned long new_freq),
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TP_ARGS(dev, old_freq, new_freq)
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);
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DEFINE_EVENT(podgov_update_freq, podgov_clocks_handler,
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TP_PROTO(struct device *dev, unsigned long old_freq, unsigned long new_freq),
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TP_ARGS(dev, old_freq, new_freq)
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);
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TRACE_EVENT(podgov_enabled,
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TP_PROTO(struct device *dev, int enable),
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TP_ARGS(dev, enable),
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TP_STRUCT__entry(
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__field(struct device *, dev)
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__field(int, enable)
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),
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TP_fast_assign(
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__entry->dev = dev;
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__entry->enable = enable;
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),
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TP_printk("name=%s, scaling_enabled=%d", dev_name(__entry->dev), __entry->enable)
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);
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TRACE_EVENT(podgov_set_user_ctl,
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TP_PROTO(struct device *dev, int user_ctl),
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TP_ARGS(dev, user_ctl),
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TP_STRUCT__entry(
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__field(struct device *, dev)
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__field(int, user_ctl)
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),
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TP_fast_assign(
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__entry->dev = dev;
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__entry->user_ctl = user_ctl;
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),
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TP_printk("name=%s, userspace control=%d", dev_name(__entry->dev), __entry->user_ctl)
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);
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TRACE_EVENT(podgov_set_freq_request,
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TP_PROTO(struct device *dev, int freq_request),
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TP_ARGS(dev, freq_request),
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TP_STRUCT__entry(
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__field(struct device *, dev)
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__field(int, freq_request)
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),
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TP_fast_assign(
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__entry->dev = dev;
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__entry->freq_request = freq_request;
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),
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TP_printk("name=%s, freq_request=%d", dev_name(__entry->dev), __entry->freq_request)
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);
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TRACE_EVENT(podgov_busy,
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TP_PROTO(struct device *dev, unsigned long busyness),
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TP_ARGS(dev, busyness),
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TP_STRUCT__entry(
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__field(struct device *, dev)
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__field(unsigned long, busyness)
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),
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TP_fast_assign(
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__entry->dev = dev;
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__entry->busyness = busyness;
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),
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TP_printk("name=%s, busyness=%lu", dev_name(__entry->dev), __entry->busyness)
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);
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TRACE_EVENT(podgov_hint,
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TP_PROTO(struct device *dev, long idle_estimate, int hint),
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TP_ARGS(dev, idle_estimate, hint),
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TP_STRUCT__entry(
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__field(struct device *, dev)
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__field(long, idle_estimate)
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__field(int, hint)
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),
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TP_fast_assign(
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__entry->dev = dev;
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__entry->idle_estimate = idle_estimate;
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__entry->hint = hint;
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),
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TP_printk("podgov (%s): idle %ld, hint %d", dev_name(__entry->dev),
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__entry->idle_estimate, __entry->hint)
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);
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TRACE_EVENT(podgov_idle,
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TP_PROTO(struct device *dev, unsigned long idleness),
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TP_ARGS(dev, idleness),
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TP_STRUCT__entry(
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__field(struct device *, dev)
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__field(unsigned long, idleness)
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),
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TP_fast_assign(
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__entry->dev = dev;
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__entry->idleness = idleness;
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),
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TP_printk("name=%s, idleness=%lu", dev_name(__entry->dev), __entry->idleness)
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);
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TRACE_EVENT(podgov_load,
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TP_PROTO(struct device *dev, unsigned long load),
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TP_ARGS(dev, load),
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TP_STRUCT__entry(
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__field(struct device *, dev)
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__field(unsigned long, load)
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),
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TP_fast_assign(
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__entry->dev = dev;
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__entry->load = load;
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),
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TP_printk("name=%s, load=%lu", dev_name(__entry->dev), __entry->load)
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);
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TRACE_EVENT(podgov_print_target,
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TP_PROTO(struct device *dev, long busy, int avg_busy, long curr,
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long target, int hint, int avg_hint),
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TP_ARGS(dev, busy, avg_busy, curr, target, hint, avg_hint),
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TP_STRUCT__entry(
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__field(struct device *, dev)
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__field(long, busy)
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__field(int, avg_busy)
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__field(long, curr)
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__field(long, target)
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__field(int, hint)
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__field(int, avg_hint)
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),
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TP_fast_assign(
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__entry->dev = dev;
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__entry->busy = busy;
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__entry->avg_busy = avg_busy;
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__entry->curr = curr;
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__entry->target = target;
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__entry->hint = hint;
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__entry->avg_hint = avg_hint;
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),
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TP_printk("podgov (%s): busy %ld <%d>, curr %ld, t %ld, hint %d <%d>\n",
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dev_name(__entry->dev), __entry->busy, __entry->avg_busy, __entry->curr,
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__entry->target, __entry->hint, __entry->avg_hint)
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);
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TRACE_EVENT(podgov_stats,
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TP_PROTO(struct device *dev, int fast_up_count, int slow_down_count,
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unsigned int idle_min, unsigned int idle_max),
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TP_ARGS(dev, fast_up_count, slow_down_count, idle_min, idle_max),
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TP_STRUCT__entry(
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__field(struct device *, dev)
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__field(int, fast_up_count)
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__field(int, slow_down_count)
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__field(unsigned int, idle_min)
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__field(unsigned int, idle_max)
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),
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TP_fast_assign(
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__entry->dev = dev;
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__entry->fast_up_count = fast_up_count;
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__entry->slow_down_count = slow_down_count;
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__entry->idle_min = idle_min;
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__entry->idle_max = idle_max;
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),
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TP_printk("podgov stats (%s): + %d - %d min %u max %u\n",
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dev_name(__entry->dev), __entry->fast_up_count,
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__entry->slow_down_count, __entry->idle_min,
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__entry->idle_max)
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);
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#endif /* _TRACE_NVHOST_PODGOV_H */
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/* This part must be outside protection */
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#include <trace/define_trace.h>
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