linux-kernel - Re: [PATCH v3 1/2] remoteproc: Introduce traces for remoteproc events

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Date:   Sat, 15 Jul 2023 14:33:49 -0700
From:   Bjorn Andersson <andersson@...nel.org>
To:     Gokul krishna Krishnakumar <quic_gokukris@...cinc.com>
Cc:     linux-remoteproc@...r.kernel.org,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        linux-kernel@...r.kernel.org, Trilok Soni <quic_tsoni@...cinc.com>,
        Satya Durga Srinivasu Prabhala <quic_satyap@...cinc.com>,
        Rajendra Nayak <quic_rjendra@...cinc.com>,
        Elliot Berman <quic_eberman@...cinc.com>,
        Guru Das Srinagesh <quic_gurus@...cinc.com>,
        Sibi Sankar <quic_sibis@...cinc.com>,
        Melody Olvera <quic_molvera@...cinc.com>
Subject: Re: [PATCH v3 1/2] remoteproc: Introduce traces for remoteproc events

On Wed, May 10, 2023 at 11:05:03AM -0700, Gokul krishna Krishnakumar wrote:
> Adding Traces for the following remoteproc events:
> 	rproc_subdev_event,
> 	rproc_interrupt_event,
> 	rproc_load_event,
> 	rproc_start_event,
> 	rproc_stop_event

No need to list the individual trace events, instead please use the
commit message do capture what problem(s) you intend you have for these
trace events - so that someone reading this can understand why these
particular events was added (and why others weren't).

> 
> Signed-off-by: Gokul krishna Krishnakumar <quic_gokukris@...cinc.com>
> ---
>  drivers/remoteproc/Makefile           |   1 +
>  drivers/remoteproc/qcom_tracepoints.c |  12 +++
>  include/trace/events/rproc_qcom.h     | 128 ++++++++++++++++++++++++++
>  3 files changed, 141 insertions(+)
>  create mode 100644 drivers/remoteproc/qcom_tracepoints.c
>  create mode 100644 include/trace/events/rproc_qcom.h
> 
> diff --git a/drivers/remoteproc/Makefile b/drivers/remoteproc/Makefile
> index 91314a9b43ce..3399fcaba39b 100644
> --- a/drivers/remoteproc/Makefile
> +++ b/drivers/remoteproc/Makefile
> @@ -10,6 +10,7 @@ remoteproc-y				+= remoteproc_debugfs.o
>  remoteproc-y				+= remoteproc_sysfs.o
>  remoteproc-y				+= remoteproc_virtio.o
>  remoteproc-y				+= remoteproc_elf_loader.o
> +remoteproc-y				+= qcom_tracepoints.o
>  obj-$(CONFIG_REMOTEPROC_CDEV)		+= remoteproc_cdev.o
>  obj-$(CONFIG_IMX_REMOTEPROC)		+= imx_rproc.o
>  obj-$(CONFIG_IMX_DSP_REMOTEPROC)	+= imx_dsp_rproc.o
> diff --git a/drivers/remoteproc/qcom_tracepoints.c b/drivers/remoteproc/qcom_tracepoints.c
> new file mode 100644
> index 000000000000..1b587ef54aa7
> --- /dev/null
> +++ b/drivers/remoteproc/qcom_tracepoints.c
> @@ -0,0 +1,12 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved.
> + */
> +
> +#define CREATE_TRACE_POINTS
> +#include <trace/events/rproc_qcom.h>
> +EXPORT_TRACEPOINT_SYMBOL(rproc_load_event);
> +EXPORT_TRACEPOINT_SYMBOL(rproc_start_event);
> +EXPORT_TRACEPOINT_SYMBOL(rproc_stop_event);
> +EXPORT_TRACEPOINT_SYMBOL(rproc_interrupt_event);
> +EXPORT_TRACEPOINT_SYMBOL(rproc_subdev_event);
> diff --git a/include/trace/events/rproc_qcom.h b/include/trace/events/rproc_qcom.h
> new file mode 100644
> index 000000000000..48ad26ce18a3
> --- /dev/null
> +++ b/include/trace/events/rproc_qcom.h
> @@ -0,0 +1,128 @@
> +/* SPDX-License-Identifier: GPL-2.0-only */
> +/*
> + * Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved.
> + */
> +
> +#undef TRACE_SYSTEM
> +#define TRACE_SYSTEM rproc_qcom
> +
> +#if !defined(_TRACE_RPROC_QCOM_H) || defined(TRACE_HEADER_MULTI_READ)
> +#define _TRACE_RPROC_QCOM_H
> +#include <linux/tracepoint.h>
> +#include <linux/remoteproc.h>
> +
> +/*
> + * Tracepoints for remoteproc and subdevice events
> + */
> +TRACE_EVENT(rproc_load_event,

Please split these into more specific events, so that one can easily
enable specific events depending on which answers one is looking for.

Please avoid the _event suffix.

Regards,
Bjorn