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mmc: core: Provide tracepoints for request processing

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This patch provides some tracepoints for the lifecycle of a mmc request
from starting to completion to help with performance analysis of MMC
subsystem.

Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Baolin Wang 2016-03-31 11:16:27 +08:00 committed by Ulf Hansson
parent 1ca4d3596e
commit 7962fc376f
2 changed files with 189 additions and 0 deletions
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7
drivers/mmc/core/core.c
View File

@ -36,6 +36,9 @@
#include <linux/mmc/sd.h>
#include <linux/mmc/slot-gpio.h>
#define CREATE_TRACE_POINTS
#include <trace/events/mmc.h>
#include "core.h"
#include "bus.h"
#include "host.h"
@ -140,6 +143,8 @@ void mmc_request_done(struct mmc_host *host, struct mmc_request *mrq)
cmd->retries = 0;
}
trace_mmc_request_done(host, mrq);
if (err && cmd->retries && !mmc_card_removed(host->card)) {
/*
* Request starter must handle retries - see
@ -215,6 +220,8 @@ static void __mmc_start_request(struct mmc_host *host, struct mmc_request *mrq)
}
}
trace_mmc_request_start(host, mrq);
host->ops->request(host, mrq);
}

182
include/trace/events/mmc.h Normal file
View File

@ -0,0 +1,182 @@
#undef TRACE_SYSTEM
#define TRACE_SYSTEM mmc
#if !defined(_TRACE_MMC_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_MMC_H
#include <linux/blkdev.h>
#include <linux/mmc/core.h>
#include <linux/mmc/host.h>
#include <linux/tracepoint.h>
TRACE_EVENT(mmc_request_start,
TP_PROTO(struct mmc_host *host, struct mmc_request *mrq),
TP_ARGS(host, mrq),
TP_STRUCT__entry(
__field(u32, cmd_opcode)
__field(u32, cmd_arg)
__field(unsigned int, cmd_flags)
__field(unsigned int, cmd_retries)
__field(u32, stop_opcode)
__field(u32, stop_arg)
__field(unsigned int, stop_flags)
__field(unsigned int, stop_retries)
__field(u32, sbc_opcode)
__field(u32, sbc_arg)
__field(unsigned int, sbc_flags)
__field(unsigned int, sbc_retries)
__field(unsigned int, blocks)
__field(unsigned int, blksz)
__field(unsigned int, data_flags)
__field(unsigned int, can_retune)
__field(unsigned int, doing_retune)
__field(unsigned int, retune_now)
__field(int, need_retune)
__field(int, hold_retune)
__field(unsigned int, retune_period)
__field(struct mmc_request *, mrq)
__string(name, mmc_hostname(host))
),
TP_fast_assign(
__entry->cmd_opcode = mrq->cmd->opcode;
__entry->cmd_arg = mrq->cmd->arg;
__entry->cmd_flags = mrq->cmd->flags;
__entry->cmd_retries = mrq->cmd->retries;
__entry->stop_opcode = mrq->stop ? mrq->stop->opcode : 0;
__entry->stop_arg = mrq->stop ? mrq->stop->arg : 0;
__entry->stop_flags = mrq->stop ? mrq->stop->flags : 0;
__entry->stop_retries = mrq->stop ? mrq->stop->retries : 0;
__entry->sbc_opcode = mrq->sbc ? mrq->sbc->opcode : 0;
__entry->sbc_arg = mrq->sbc ? mrq->sbc->arg : 0;
__entry->sbc_flags = mrq->sbc ? mrq->sbc->flags : 0;
__entry->sbc_retries = mrq->sbc ? mrq->sbc->retries : 0;
__entry->blksz = mrq->data ? mrq->data->blksz : 0;
__entry->blocks = mrq->data ? mrq->data->blocks : 0;
__entry->data_flags = mrq->data ? mrq->data->flags : 0;
__entry->can_retune = host->can_retune;
__entry->doing_retune = host->doing_retune;
__entry->retune_now = host->retune_now;
__entry->need_retune = host->need_retune;
__entry->hold_retune = host->hold_retune;
__entry->retune_period = host->retune_period;
__assign_str(name, mmc_hostname(host));
__entry->mrq = mrq;
),
TP_printk("%s: start struct mmc_request[%p]: "
"cmd_opcode=%u cmd_arg=0x%x cmd_flags=0x%x cmd_retries=%u "
"stop_opcode=%u stop_arg=0x%x stop_flags=0x%x stop_retries=%u "
"sbc_opcode=%u sbc_arg=0x%x sbc_flags=0x%x sbc_retires=%u "
"blocks=%u block_size=%u data_flags=0x%x "
"can_retune=%u doing_retune=%u retune_now=%u "
"need_retune=%d hold_retune=%d retune_period=%u",
__get_str(name), __entry->mrq,
__entry->cmd_opcode, __entry->cmd_arg,
__entry->cmd_flags, __entry->cmd_retries,
__entry->stop_opcode, __entry->stop_arg,
__entry->stop_flags, __entry->stop_retries,
__entry->sbc_opcode, __entry->sbc_arg,
__entry->sbc_flags, __entry->sbc_retries,
__entry->blocks, __entry->blksz, __entry->data_flags,
__entry->can_retune, __entry->doing_retune,
__entry->retune_now, __entry->need_retune,
__entry->hold_retune, __entry->retune_period)
);
TRACE_EVENT(mmc_request_done,
TP_PROTO(struct mmc_host *host, struct mmc_request *mrq),
TP_ARGS(host, mrq),
TP_STRUCT__entry(
__field(u32, cmd_opcode)
__field(int, cmd_err)
__array(u32, cmd_resp, 4)
__field(unsigned int, cmd_retries)
__field(u32, stop_opcode)
__field(int, stop_err)
__array(u32, stop_resp, 4)
__field(unsigned int, stop_retries)
__field(u32, sbc_opcode)
__field(int, sbc_err)
__array(u32, sbc_resp, 4)
__field(unsigned int, sbc_retries)
__field(unsigned int, bytes_xfered)
__field(int, data_err)
__field(unsigned int, can_retune)
__field(unsigned int, doing_retune)
__field(unsigned int, retune_now)
__field(int, need_retune)
__field(int, hold_retune)
__field(unsigned int, retune_period)
__field(struct mmc_request *, mrq)
__string(name, mmc_hostname(host))
),
TP_fast_assign(
__entry->cmd_opcode = mrq->cmd->opcode;
__entry->cmd_err = mrq->cmd->error;
memcpy(__entry->cmd_resp, mrq->cmd->resp, 4);
__entry->cmd_retries = mrq->cmd->retries;
__entry->stop_opcode = mrq->stop ? mrq->stop->opcode : 0;
__entry->stop_err = mrq->stop ? mrq->stop->error : 0;
__entry->stop_resp[0] = mrq->stop ? mrq->stop->resp[0] : 0;
__entry->stop_resp[1] = mrq->stop ? mrq->stop->resp[1] : 0;
__entry->stop_resp[2] = mrq->stop ? mrq->stop->resp[2] : 0;
__entry->stop_resp[3] = mrq->stop ? mrq->stop->resp[3] : 0;
__entry->stop_retries = mrq->stop ? mrq->stop->retries : 0;
__entry->sbc_opcode = mrq->sbc ? mrq->sbc->opcode : 0;
__entry->sbc_err = mrq->sbc ? mrq->sbc->error : 0;
__entry->sbc_resp[0] = mrq->sbc ? mrq->sbc->resp[0] : 0;
__entry->sbc_resp[1] = mrq->sbc ? mrq->sbc->resp[1] : 0;
__entry->sbc_resp[2] = mrq->sbc ? mrq->sbc->resp[2] : 0;
__entry->sbc_resp[3] = mrq->sbc ? mrq->sbc->resp[3] : 0;
__entry->sbc_retries = mrq->sbc ? mrq->sbc->retries : 0;
__entry->bytes_xfered = mrq->data ? mrq->data->bytes_xfered : 0;
__entry->data_err = mrq->data ? mrq->data->error : 0;
__entry->can_retune = host->can_retune;
__entry->doing_retune = host->doing_retune;
__entry->retune_now = host->retune_now;
__entry->need_retune = host->need_retune;
__entry->hold_retune = host->hold_retune;
__entry->retune_period = host->retune_period;
__assign_str(name, mmc_hostname(host));
__entry->mrq = mrq;
),
TP_printk("%s: end struct mmc_request[%p]: "
"cmd_opcode=%u cmd_err=%d cmd_resp=0x%x 0x%x 0x%x 0x%x "
"cmd_retries=%u stop_opcode=%u stop_err=%d "
"stop_resp=0x%x 0x%x 0x%x 0x%x stop_retries=%u "
"sbc_opcode=%u sbc_err=%d sbc_resp=0x%x 0x%x 0x%x 0x%x "
"sbc_retries=%u bytes_xfered=%u data_err=%d "
"can_retune=%u doing_retune=%u retune_now=%u need_retune=%d "
"hold_retune=%d retune_period=%u",
__get_str(name), __entry->mrq,
__entry->cmd_opcode, __entry->cmd_err,
__entry->cmd_resp[0], __entry->cmd_resp[1],
__entry->cmd_resp[2], __entry->cmd_resp[3],
__entry->cmd_retries,
__entry->stop_opcode, __entry->stop_err,
__entry->stop_resp[0], __entry->stop_resp[1],
__entry->stop_resp[2], __entry->stop_resp[3],
__entry->stop_retries,
__entry->sbc_opcode, __entry->sbc_err,
__entry->sbc_resp[0], __entry->sbc_resp[1],
__entry->sbc_resp[2], __entry->sbc_resp[3],
__entry->sbc_retries,
__entry->bytes_xfered, __entry->data_err,
__entry->can_retune, __entry->doing_retune,
__entry->retune_now, __entry->need_retune,
__entry->hold_retune, __entry->retune_period)
);
#endif /* _TRACE_MMC_H */
/* This part must be outside protection */
#include <trace/define_trace.h>