From: Brian Masney <bmasney@redhat.com>
To: Souradeep Chowdhury <quic_schowdhu@quicinc.com>
Cc: Andy Gross <agross@kernel.org>,
Konrad Dybcio <konrad.dybcio@somainline.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
Bjorn Andersson <andersson@kernel.org>,
Rob Herring <robh+dt@kernel.org>, Arnd Bergmann <arnd@arndb.de>,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org,
devicetree@vger.kernel.org, Sibi Sankar <quic_sibis@quicinc.com>,
Rajendra Nayak <quic_rjendra@quicinc.com>
Subject: Re: [PATCH V7 0/2] firmware: Add support for boot_stats
Date: Mon, 10 Jul 2023 11:20:33 -0400 [thread overview]
Message-ID: <ZKwhwUnKR7vqQZms@brian-x1> (raw)
In-Reply-To: <cover.1688533340.git.quic_schowdhu@quicinc.com>
On Wed, Jul 05, 2023 at 11:02:30AM +0530, Souradeep Chowdhury wrote:
> Qualcomm's proprietary Android boot-loaders capture boot time
> stats, like the time when the bootloader started execution and at what
> point the bootloader handed over control to the kernel etc. in the IMEM
> region. This information is captured by the bootloader and populated on
> the device tree properties "pre-abl-time" and "abl-time" which can be
> be viewed from the user space like as follows:-
>
> /sys/firmware/devicetree/base/bootstats # cat abl_time
> 17898
>
> As a part of this patch series added the bindings for boot-stats which
> was suggested in the v6 of the series. The link for the same is as
> follows:-
Should boot statistics be exposed to userspace through the qcom socinfo
driver? I see that the socinfo v19 metadata has fields for the boot core
and boot cluster [1], so boot timing wouldn't be out of place.
Brian
[1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/soc/qcom/socinfo.c#n572
next prev parent reply other threads:[~2023-07-10 15:21 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-07-05 5:32 [PATCH V7 0/2] firmware: Add support for boot_stats Souradeep Chowdhury
2023-07-05 5:32 ` [PATCH V7 1/2] dt-bindings: firmware: bootstats: Add the dtschema Souradeep Chowdhury
2023-07-05 6:17 ` Krzysztof Kozlowski
2023-07-05 8:33 ` Souradeep Chowdhury
2023-07-05 9:34 ` Krzysztof Kozlowski
2023-07-05 19:30 ` Rob Herring
2023-07-05 21:14 ` Dmitry Baryshkov
2023-07-06 7:13 ` Souradeep Chowdhury
2023-07-05 5:32 ` [PATCH V7 2/2] MAINTAINERS: Add the entry for boot_stats support Souradeep Chowdhury
2023-07-10 15:20 ` Brian Masney [this message]
2023-07-11 5:30 ` [PATCH V7 0/2] firmware: Add support for boot_stats Souradeep Chowdhury
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