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Commit 6105c524 authored by Dov Levenglick's avatar Dov Levenglick
Browse files

mmc: sdhci-msm: add pm_qos trace-points 



Add trace-points for tracking pm_qos voting.
This assists in following the voting for debugging
performance related issues.

Change-Id: I5a9e886c739252043e9f28f100e0493436a0eb75
Signed-off-by: default avatarDov Levenglick <dovl@codeaurora.org>
parent 03e5732d

drivers/mmc/host/sdhci-msm.c

+22 −0
Original line number Diff line number Diff line
@@ -42,6 +42,7 @@ 
#include <linux/pinctrl/consumer.h>

#include <linux/msm-bus.h>



#include <trace/events/mmc.h>

#include "sdhci-pltfm.h"



enum sdc_mpm_pin_state {
@@ -1629,6 +1630,11 @@ static void pm_qos_dump_configuration(struct device *dev, 
			config->cpu_dma_latency_tbl_us[2]);

	else

		dev_dbg(dev, "not dumping latency_us table\n");



	trace_mmc_pm_qos_config(dev_name(dev), config->cpu_affinity_type,

			&config->cpu_affinity_mask, config->rw_policy,

			config->cpu_dma_latency_tbl_us,

			config->cpu_dma_latency_tbl_sz);

}



static struct sdhci_msm_pm_qos_config *search_pm_qos_config(
@@ -1662,6 +1668,7 @@ static void pm_qos_update(struct sdhci_host *host, 
	s32 latency;

	unsigned int default_num;

	bool update_timeout;

	const char *name = dev_name(dev);



	if (list_empty(&mngmt->head))

		return;
@@ -1699,6 +1706,9 @@ static void pm_qos_update(struct sdhci_host *host, 
			dev_dbg(dev,

				"could not find default configuration got mngmt->type=%d\n",

				mngmt->type);

			trace_mmc_pm_qos_skip(name,

				"could not find default configuration",

				mngmt->type);

			goto out_no_update;

		}

	}
@@ -1737,6 +1747,8 @@ static void pm_qos_update(struct sdhci_host *host, 
		dev_dbg(dev,

			"skipping update of pm qos for mngmt->type=%d (no change)\n",

			mngmt->type);

		trace_mmc_pm_qos_skip(name, "no change, skipping pm_qos_voting",

			mngmt->type);

		goto out_no_update;

	}
@@ -1750,16 +1762,26 @@ static void pm_qos_update(struct sdhci_host *host, 
		 * request, it is necessary to remove the old one and add

		 * a new one.

		 */

		trace_mmc_pm_qos_remove(name, mngmt->prev_latency,

					mngmt->type,

					&mngmt->prev->cpu_affinity_mask);

		pm_qos_remove_request(&mngmt->dma_req);

		cpumask_copy(&mngmt->dma_req.cpus_affine,

			     &config->cpu_affinity_mask);

		trace_mmc_pm_qos_add(name, latency, mngmt->type,

					&config->cpu_affinity_mask);

		pm_qos_add_request(&mngmt->dma_req,

				   PM_QOS_CPU_DMA_LATENCY, latency);

	} else {

		trace_mmc_pm_qos_update(name, latency, mngmt->type,

					&config->cpu_affinity_mask);

		pm_qos_update_request(&mngmt->dma_req, latency);

	}



	if (update_timeout) {

		trace_mmc_pm_qos_update_timeout(name,

					latency, mngmt->type,

					&mngmt->prev->cpu_affinity_mask);

		pm_qos_update_request_timeout(&mngmt->dma_req,

			latency, pdata->pm_qos.pm_qos_timeout_us);

		/*

include/trace/events/mmc.h

+106 −1
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2013 Google, Inc.

 * Copyright (c) 2013-2014, The Linux Foundation. All rights reserved.

 * Copyright (c) 2013-2015, The Linux Foundation. All rights reserved.

 *

 * This software is licensed under the terms of the GNU General Public

 * License version 2, as published by the Free Software Foundation, and
@@ -209,6 +209,111 @@ DEFINE_EVENT(mmc_pm_template, mmc_resume_host, 
	     TP_PROTO(const char *dev_name, int err, s64 usecs),

	     TP_ARGS(dev_name, err, usecs));



DECLARE_EVENT_CLASS(mmc_pm_qos_template,

	TP_PROTO(const char *dev_name, s32 latency, int type,

		cpumask_t *cpumask),



	TP_ARGS(dev_name, latency, type, cpumask),



	TP_STRUCT__entry(

		__string(dev_name, dev_name)

		__field(s32, latency)

		__field(int, type)

		__field(u32, cpumask)

	),



	TP_fast_assign(

		__assign_str(dev_name, dev_name);

		__entry->latency = latency;

		__entry->type = type;

		__entry->cpumask = cpumask->bits[0];

	),



	TP_printk(

		"%s: latency=%d for req_type=%d with cpu mask=0x%08X",

		__get_str(dev_name),

		__entry->latency,

		__entry->type,

		__entry->cpumask

	)

);



DEFINE_EVENT(mmc_pm_qos_template, mmc_pm_qos_add,

	TP_PROTO(const char *dev_name, s32 latency, int type,

		cpumask_t *cpumask),

	TP_ARGS(dev_name, latency, type, cpumask));



DEFINE_EVENT(mmc_pm_qos_template, mmc_pm_qos_update,

	TP_PROTO(const char *dev_name, s32 latency, int type,

		cpumask_t *cpumask),

	TP_ARGS(dev_name, latency, type, cpumask));



DEFINE_EVENT(mmc_pm_qos_template, mmc_pm_qos_update_timeout,

	TP_PROTO(const char *dev_name, s32 latency, int type,

		cpumask_t *cpumask),

	TP_ARGS(dev_name, latency, type, cpumask));



DEFINE_EVENT(mmc_pm_qos_template, mmc_pm_qos_remove,

	TP_PROTO(const char *dev_name, s32 latency, int type,

		cpumask_t *cpumask),

	TP_ARGS(dev_name, latency, type, cpumask));



TRACE_EVENT(mmc_pm_qos_config,



	TP_PROTO(const char *dev_name, int type, cpumask_t *cpumask,

		 int policy, u32 *latencies, unsigned num),



	TP_ARGS(dev_name, type, cpumask, policy, latencies, num),



	TP_STRUCT__entry(

		__string(dev_name, dev_name)

		__field(int, type)

		__field(u32, cpumask)

		__field(int, policy)

		__field(unsigned, num)

		__dynamic_array(u32, _latencies, num)

	),



	TP_fast_assign(

		__assign_str(dev_name, dev_name);

		__entry->type = type;

		__entry->cpumask = cpumask->bits[0];

		__entry->policy = policy;

		__entry->num = num;

		memcpy(__get_dynamic_array(_latencies), latencies, num);

	),



	TP_printk(

		"%s: req_type=%d, cpu mask=0x%08X, policy=%d, tbl_sz=%d, latencies=%s",

		__get_str(dev_name), __entry->type,

		__entry->cpumask, __entry->policy, __entry->num,

		__print_hex(__get_dynamic_array(_latencies), __entry->num)

	)

);



TRACE_EVENT(mmc_pm_qos_skip,



	TP_PROTO(const char *dev_name, const char *msg, int type),



	TP_ARGS(dev_name, msg, type),



	TP_STRUCT__entry(

		__string(dev_name, dev_name)

		__string(msg, msg)

		__field(int, type)

	),



	TP_fast_assign(

		__assign_str(dev_name, dev_name);

		__assign_str(msg, msg);

		__entry->type = type;

	),



	TP_printk("%s: %s for req_type=%d\n",

		__get_str(dev_name), __get_str(msg), __entry->type

	)

);



#endif /* if !defined(_TRACE_MMC_H) || defined(TRACE_HEADER_MULTI_READ) */



/* This part must be outside protection */