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mmc: sdhci-msm: add pm_qos trace-points

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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: Dov Levenglick <dovl@codeaurora.org>
This commit is contained in:
Dov Levenglick 2015-03-04 08:56:15 +02:00
parent a9070cf869
commit 2ada209031
2 changed files with 128 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

22
drivers/mmc/host/sdhci-msm.c
View file

@ -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);
/*

107
include/trace/events/mmc.h
View file

@ -1,6 +1,6 @@
/*
* 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 */