linux-kernel - Re: [RESEND Patch v6 0/2] add performance reporting support to FPGA DFL drivers

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Date:   Fri, 17 Jan 2020 11:39:34 +0800
From:   Wu Hao <hao.wu@...el.com>
To:     will@...nel.org
Cc:     mdf@...nel.org, mark.rutland@....com, linux-fpga@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-api@...r.kernel.org,
        atull@...nel.org, gregkh@...uxfoundation.org
Subject: Re: [RESEND Patch v6 0/2] add performance reporting support to FPGA
 DFL drivers

Hi Will

I resend this patch per suggestion from Greg.

Actually this is one important feature for users, but was blocked by
code review for quite a long time (no comments since last November).

We really need your help on code review from perf, please help us..

Many Thanks!

Hao

On Fri, Jan 17, 2020 at 11:10:26AM +0800, Wu Hao wrote:
> Hi all,
> 
> This patchset adds performance reporting support for FPGA DFL drivers. It
> introduces one pmu to expose userspace interfaces via standard perf API.
> User could use standard perf tool to access perf events exposed via pmu.
> 
> This patchset is generated based on latest fpga/for-next branch.
> 
> Main changes from v5:
>  - use dev_ext_attribute instead of fme_perf_event_attr.
>  - use is_visible function to decide which events to expose per
>    hardware capability, and add event_init checking for all events.
> 
> Main changes from v4:
>  - rebase and clean up.
>  - update Kconfig for PERF_EVENTS dependency.
> 
> Main changes from v3:
>  - add more descriptions in doc, including how to use perf tool for these
>    hardware counters. (patch #1)
>  - use standard perf API instead of sysfs entries. (patch #2)
> 
> Wu Hao (1):
>   fpga: dfl: fme: add performance reporting support
> 
> Xu Yilun (1):
>   Documentation: fpga: dfl: add description for performance reporting
>     support
> 
>  Documentation/fpga/dfl.rst  |  83 ++++
>  drivers/fpga/Makefile       |   1 +
>  drivers/fpga/dfl-fme-main.c |   4 +
>  drivers/fpga/dfl-fme-perf.c | 943 ++++++++++++++++++++++++++++++++++++++++++++
>  drivers/fpga/dfl-fme.h      |   2 +
>  drivers/fpga/dfl.h          |   2 +
>  6 files changed, 1035 insertions(+)
>  create mode 100644 drivers/fpga/dfl-fme-perf.c
> 
> -- 
> 1.8.3.1