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c46ab9db64
The tracepoints can help with understanding the system behavior of a given interconnect path when the consumer drivers change their bandwidth demands. This might be interesting when we want to monitor the requested interconnect bandwidth for each client driver. The paths may share the same nodes and this will help to understand "who and when is requesting what". All this is useful for subsystem drivers developers and may also provide hints when optimizing the power and performance profile of the system. Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
88 lines
1.9 KiB
C
88 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Interconnect framework tracepoints
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* Copyright (c) 2019, Linaro Ltd.
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* Author: Georgi Djakov <georgi.djakov@linaro.org>
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*/
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#undef TRACE_SYSTEM
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#define TRACE_SYSTEM interconnect
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#if !defined(_TRACE_INTERCONNECT_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_INTERCONNECT_H
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#include <linux/interconnect.h>
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#include <linux/tracepoint.h>
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TRACE_EVENT(icc_set_bw,
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TP_PROTO(struct icc_path *p, struct icc_node *n, int i,
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u32 avg_bw, u32 peak_bw),
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TP_ARGS(p, n, i, avg_bw, peak_bw),
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TP_STRUCT__entry(
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__string(path_name, p->name)
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__string(dev, dev_name(p->reqs[i].dev))
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__string(node_name, n->name)
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__field(u32, avg_bw)
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__field(u32, peak_bw)
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__field(u32, node_avg_bw)
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__field(u32, node_peak_bw)
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),
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TP_fast_assign(
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__assign_str(path_name, p->name);
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__assign_str(dev, dev_name(p->reqs[i].dev));
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__assign_str(node_name, n->name);
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__entry->avg_bw = avg_bw;
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__entry->peak_bw = peak_bw;
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__entry->node_avg_bw = n->avg_bw;
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__entry->node_peak_bw = n->peak_bw;
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),
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TP_printk("path=%s dev=%s node=%s avg_bw=%u peak_bw=%u agg_avg=%u agg_peak=%u",
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__get_str(path_name),
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__get_str(dev),
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__get_str(node_name),
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__entry->avg_bw,
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__entry->peak_bw,
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__entry->node_avg_bw,
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__entry->node_peak_bw)
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);
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TRACE_EVENT(icc_set_bw_end,
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TP_PROTO(struct icc_path *p, int ret),
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TP_ARGS(p, ret),
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TP_STRUCT__entry(
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__string(path_name, p->name)
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__string(dev, dev_name(p->reqs[0].dev))
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__field(int, ret)
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),
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TP_fast_assign(
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__assign_str(path_name, p->name);
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__assign_str(dev, dev_name(p->reqs[0].dev));
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__entry->ret = ret;
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),
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TP_printk("path=%s dev=%s ret=%d",
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__get_str(path_name),
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__get_str(dev),
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__entry->ret)
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);
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#endif /* _TRACE_INTERCONNECT_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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#undef TRACE_INCLUDE_FILE
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#define TRACE_INCLUDE_FILE trace
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#include <trace/define_trace.h>
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