From: Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>
To: Suzuki K Poulose <suzuki.poulose@arm.com>,
gregkh@linuxfoundation.org, mathieu.poirier@linaro.org,
leo.yan@linaro.org, alexander.shishkin@linux.intel.com,
mike.leach@linaro.org, robh+dt@kernel.org,
bjorn.andersson@linaro.org, devicetree@vger.kernel.org,
david.brown@linaro.org, mark.rutland@arm.com
Cc: rnayak@codeaurora.org, marc.w.gonzalez@free.fr,
linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org,
sibis@codeaurora.org, vivek.gautam@codeaurora.org,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCHv8 2/5] arm64: dts: qcom: msm8998: Add Coresight support
Date: Thu, 18 Jul 2019 15:23:49 +0530
Message-ID: <2b08943b-3900-ceb5-15ac-28ef2bbad03e@codeaurora.org> (raw)
In-Reply-To: <281e3548-af53-f9a7-b9e4-813b448ab078@arm.com>
Hi,
On 7/18/2019 3:07 PM, Suzuki K Poulose wrote:
>
>
> Using the sysfs doesn't guarantee that the ETR actually uses SG mode,
> unless
> the buffer size selected is > 1M, which is why I am more interested in the
> perf usage. Alternatively you may configure a larger buffer size (say,
> 8MB) via:
>
> echo 0x800000 > /sys/bus/coresight/.../tmc_etr0/buffer_size
>
Yes, you had mentioned about setting buffer size > 1M in the same
thread[1] and I had followed the same.
[1] https://lkml.org/lkml/2019/1/18/311
>
>>
>> As said in one of the series initially [1], QCOM msm downstream kernels
>> have been using scatter gather mode and we haven't seen any fatal issues.
>>
>> [1] https://patchwork.kernel.org/patch/10769535/
>
> I haven't seen any test results there either.
>
You did not ask for it there ;)
I do not have the test results handy now and those platforms.
I will arrange for them and post some test results.
Just to confirm, do you need some traces or just the buffer size
and sink set?
Thanks,
Sai
--
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member
of Code Aurora Forum, hosted by The Linux Foundation
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply index
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-12 14:16 [PATCHv8 0/5] Add coresight support for SDM845, MSM8998 and MSM8996 Sai Prakash Ranjan
2019-07-12 14:16 ` [PATCHv8 1/5] arm64: dts: qcom: sdm845: Add Coresight support Sai Prakash Ranjan
2019-07-12 16:44 ` Suzuki K Poulose
2019-07-12 16:49 ` saiprakash.ranjan
2019-07-19 9:46 ` Suzuki K Poulose
2019-07-19 10:28 ` Sai Prakash Ranjan
2019-07-12 14:16 ` [PATCHv8 2/5] arm64: dts: qcom: msm8998: " Sai Prakash Ranjan
2019-07-18 8:28 ` Suzuki K Poulose
2019-07-18 9:14 ` Sai Prakash Ranjan
2019-07-18 9:37 ` Suzuki K Poulose
2019-07-18 9:53 ` Sai Prakash Ranjan [this message]
2019-07-12 14:16 ` [PATCHv8 3/5] arm64: dts: qcom: msm8996: " Sai Prakash Ranjan
2019-07-17 17:00 ` Mathieu Poirier
2019-07-18 5:47 ` Sai Prakash Ranjan
2019-07-18 15:31 ` Mathieu Poirier
2019-07-18 15:48 ` Bjorn Andersson
2019-07-12 14:16 ` [PATCHv8 4/5] coresight: etm4x: Add ETM PIDs for SDM845 and MSM8996 Sai Prakash Ranjan
2019-07-17 17:40 ` Mathieu Poirier
2019-07-12 14:16 ` [PATCHv8 5/5] coresight: cpu-debug: Add support for Qualcomm Kryo Sai Prakash Ranjan
2019-07-17 16:56 ` Mathieu Poirier
2019-07-21 14:35 ` Leo Yan
2019-07-22 5:48 ` Sai Prakash Ranjan
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=2b08943b-3900-ceb5-15ac-28ef2bbad03e@codeaurora.org \
--to=saiprakash.ranjan@codeaurora.org \
--cc=alexander.shishkin@linux.intel.com \
--cc=bjorn.andersson@linaro.org \
--cc=david.brown@linaro.org \
--cc=devicetree@vger.kernel.org \
--cc=gregkh@linuxfoundation.org \
--cc=leo.yan@linaro.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-arm-msm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=marc.w.gonzalez@free.fr \
--cc=mark.rutland@arm.com \
--cc=mathieu.poirier@linaro.org \
--cc=mike.leach@linaro.org \
--cc=rnayak@codeaurora.org \
--cc=robh+dt@kernel.org \
--cc=sibis@codeaurora.org \
--cc=suzuki.poulose@arm.com \
--cc=vivek.gautam@codeaurora.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Linux-ARM-Kernel Archive on lore.kernel.org
Archives are clonable:
git clone --mirror https://lore.kernel.org/linux-arm-kernel/0 linux-arm-kernel/git/0.git
git clone --mirror https://lore.kernel.org/linux-arm-kernel/1 linux-arm-kernel/git/1.git
# If you have public-inbox 1.1+ installed, you may
# initialize and index your mirror using the following commands:
public-inbox-init -V2 linux-arm-kernel linux-arm-kernel/ https://lore.kernel.org/linux-arm-kernel \
linux-arm-kernel@lists.infradead.org
public-inbox-index linux-arm-kernel
Example config snippet for mirrors
Newsgroup available over NNTP:
nntp://nntp.lore.kernel.org/org.infradead.lists.linux-arm-kernel
AGPL code for this site: git clone https://public-inbox.org/public-inbox.git