From: Joakim Zhang <qiangqing.zhang@nxp•com>
To: "will@kernel•org" <will@kernel•org>,
"mark.rutland@arm•com" <mark.rutland@arm•com>,
"robin.murphy@arm•com" <robin.murphy@arm•com>,
Frank Li <frank.li@nxp•com>
Cc: dl-linux-imx <linux-imx@nxp•com>,
"linux-arm-kernel@lists•infradead.org"
<linux-arm-kernel@lists•infradead.org>,
Joakim Zhang <qiangqing.zhang@nxp•com>
Subject: [PATCH 2/2] doc/perf: add DDR_CAP_AXI_ID_FILTER_ENHANCED quirk explanation
Date: Fri, 6 Sep 2019 08:26:59 +0000 [thread overview]
Message-ID: <20190906082356.25485-2-qiangqing.zhang@nxp.com> (raw)
In-Reply-To: <20190906082356.25485-1-qiangqing.zhang@nxp.com>
Add DDR_CAP_AXI_ID_FILTER_ENHANCED quirk explanation.
Signed-off-by: Joakim Zhang <qiangqing.zhang@nxp•com>
---
Documentation/admin-guide/perf/imx-ddr.rst | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/Documentation/admin-guide/perf/imx-ddr.rst b/Documentation/admin-guide/perf/imx-ddr.rst
index 45943c7325e3..0f2170974701 100644
--- a/Documentation/admin-guide/perf/imx-ddr.rst
+++ b/Documentation/admin-guide/perf/imx-ddr.rst
@@ -51,3 +51,10 @@ in the driver.
e.g.::
perf stat -a -e imx8_ddr0/axid-read,axi_id=0x12/ cmd, which will monitor ARID=0x12
+* With DDR_CAP_AXI_ID_FILTER_ENHANCED quirk.
+ This is the extension of DDR_CAP_AXI_ID_FILTER quirk which is only support getting
+ bursts from DDR reading or writing, i.e. only can get DDR read or write requests.
+ You can select both DDR_CAP_AXI_ID_FILTER and DDR_CAP_AXI_ID_FILTER_ENHANCED
+ quirks together to get bytes of reading or writing DDR if HW supports this
+ enhanced filter. It is meaningful as user always care more about each master's
+ bandwidth.
--
2.17.1
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next prev parent reply other threads:[~2019-09-06 8:27 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-06 8:26 [PATCH 1/2] perf/imx_ddr: add enhanced AXI ID filter support Joakim Zhang
2019-09-06 8:26 ` Joakim Zhang [this message]
2019-09-16 8:34 ` Joakim Zhang
2019-10-28 14:54 ` Will Deacon
2019-10-29 7:02 ` Joakim Zhang
2019-10-30 15:36 ` Will Deacon
2019-10-31 1:42 ` Joakim Zhang
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