From: Will Deacon <will@kernel.org>
To: Joakim Zhang <qiangqing.zhang@nxp.com>
Cc: "mark.rutland@arm.com" <mark.rutland@arm.com>,
Frank Li <frank.li@nxp.com>,
"robin.murphy@arm.com" <robin.murphy@arm.com>,
dl-linux-imx <linux-imx@nxp.com>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH V9 1/3] perf: imx8_ddr_perf: add AXI ID filter support
Date: Wed, 4 Sep 2019 11:42:38 +0100 [thread overview]
Message-ID: <20190904104238.oboadbml7f2ticat@willie-the-truck> (raw)
In-Reply-To: <DB7PR04MB4618D5EFB089C3052A25A7C2E6A20@DB7PR04MB4618.eurprd04.prod.outlook.com>
On Thu, Aug 29, 2019 at 07:26:25AM +0000, Joakim Zhang wrote:
> I have another question want to ask you, could you give me some
> suggestions?
>
> # perf stat -a -e imx8_ddr0/axid-read,axi_mask=0xf,axi_id=0x10/ cmd
>
> It will count all read transactions from AXI IDs 0x10 - 0x1f. If we
> suppose these 16 IDs are for GPU Subsystem, with above configuration we
> may want to monitor all read transactions from GPU subsystem. However, it
> is tedious for user to configure, they may not know the AXI IDs map, had
> better we can configure like below, the GPU string is more
> straightforward.
>
> # perf stat -a -e imx8_ddr0/axid-read,"GPU"/ cmd
>
> which "GPU" string is same with "axi_mask=0xf,axi_id=0x10".
Perhaps, but I think this sort of stuff belongs in userspace, since the
kernel has no idea about the AXI IDs and they're not probably anyway.
Will
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prev parent reply other threads:[~2019-09-04 10:42 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-28 12:07 [PATCH V9 1/3] perf: imx8_ddr_perf: add AXI ID filter support Joakim Zhang
2019-08-28 12:07 ` [PATCH V9 2/3] Documentation: admin-guide: perf: add i.MX8 ddr pmu user doc Joakim Zhang
2019-08-28 12:07 ` [PATCH V9 3/3] MAINTAINERS: add imx8 ddr perf admin-guide maintainer information Joakim Zhang
2019-08-28 13:44 ` [PATCH V9 1/3] perf: imx8_ddr_perf: add AXI ID filter support Will Deacon
2019-08-29 7:26 ` Joakim Zhang
2019-09-04 10:42 ` Will Deacon [this message]
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