diff mbox series

[2/2] doc/perf: add DDR_CAP_AXI_ID_FILTER_ENHANCED quirk explanation

Message ID 20190906082356.25485-2-qiangqing.zhang@nxp.com (mailing list archive)
State New, archived
Headers show
Series [1/2] perf/imx_ddr: add enhanced AXI ID filter support | expand

Commit Message

Joakim Zhang Sept. 6, 2019, 8:26 a.m. UTC 
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 mbox series

Patch

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.