[PATCH 3/3] drivers/perf: hisi: Add TLP filter support
Bagas Sanjaya
bagasdotme at gmail.com
Wed Nov 9 20:16:05 PST 2022
On Tue, Oct 25, 2022 at 07:32:42PM +0800, Yicong Yang wrote:
> +4. TLP Length filter
> +When counting bandwidth, the data can be composed of certain parts of TLP
> +packets. You can specify it through "len_mode":
> +
> +- 2'b00: Reserved (Do not use this since the behaviour is undefined)
> +- 2'b01: Bandwidth of TLP payloads
> +- 2'b10: Bandwidth of TLP headers
> +- 2'b11: Bandwidth of both TLP payloads and headers
> +
> +For example, "len_mode=2" means only counting the bandwidth of TLP headers
> +and "len_mode=3" means the final bandwidth data is composed of both TLP
> +headers and payloads. You need to carefully using this to avoid losing
> +data. For example you're likely to get no counts by "len_mode=1" if the TLPs
> +on the traffic has no payload. This config is optional, by default it'll
> +be 2'b11.
> +
> +Example usage of perf::
> +
> + $# perf stat -e hisi_pcie0_core0/rx_mrd_flux,len_mode=0x1/ sleep 5
The indentation is rather ugly, so I have applied the fixup:
---- >8 ----
diff --git a/Documentation/admin-guide/perf/hisi-pcie-pmu.rst b/Documentation/admin-guide/perf/hisi-pcie-pmu.rst
index 83a2ef11b1a08d..bae690dddbebfd 100644
--- a/Documentation/admin-guide/perf/hisi-pcie-pmu.rst
+++ b/Documentation/admin-guide/perf/hisi-pcie-pmu.rst
@@ -106,21 +106,22 @@ Example usage of perf::
$# perf stat -e hisi_pcie0_core0/rx_mrd_flux,thr_len=0x4,thr_mode=1/ sleep 5
4. TLP Length filter
-When counting bandwidth, the data can be composed of certain parts of TLP
-packets. You can specify it through "len_mode":
-- 2'b00: Reserved (Do not use this since the behaviour is undefined)
-- 2'b01: Bandwidth of TLP payloads
-- 2'b10: Bandwidth of TLP headers
-- 2'b11: Bandwidth of both TLP payloads and headers
+ When counting bandwidth, the data can be composed of certain parts of TLP
+ packets. You can specify it through "len_mode":
-For example, "len_mode=2" means only counting the bandwidth of TLP headers
-and "len_mode=3" means the final bandwidth data is composed of both TLP
-headers and payloads. You need to carefully using this to avoid losing
-data. For example you're likely to get no counts by "len_mode=1" if the TLPs
-on the traffic has no payload. This config is optional, by default it'll
-be 2'b11.
+ - 2'b00: Reserved (Do not use this since the behaviour is undefined)
+ - 2'b01: Bandwidth of TLP payloads
+ - 2'b10: Bandwidth of TLP headers
+ - 2'b11: Bandwidth of both TLP payloads and headers
-Example usage of perf::
+ For example, "len_mode=2" means only counting the bandwidth of TLP headers
+ and "len_mode=3" means the final bandwidth data is composed of both TLP
+ headers and payloads. You need to carefully using this to avoid losing
+ data. For example you're likely to get no counts by "len_mode=1" if the TLPs
+ on the traffic has no payload. This config is optional, by default it'll
+ be 2'b11.
- $# perf stat -e hisi_pcie0_core0/rx_mrd_flux,len_mode=0x1/ sleep 5
+ Example usage of perf::
+
+ $# perf stat -e hisi_pcie0_core0/rx_mrd_flux,len_mode=0x1/ sleep 5
Also, for formatting consistency, you need to pick up the fix for rest of
documentation (as separate patch in your series):
---- >8 ----
From 5f286aceb959a7c70a56cb5c453d3ac0b844fb49 Mon Sep 17 00:00:00 2001
From: Bagas Sanjaya <bagasdotme at gmail.com>
Date: Thu, 10 Nov 2022 11:03:08 +0700
Subject: [PATCH] Documentation: perf: Indent filter options list
The "Filter options" list have a rather ugly indentation. Also, the first
paragraph after list name is rendered without separator (as continuation
from the name).
Align the list by indenting the list items and add a blank line
separator for each list name.
Fixes: c8602008e247f5 ("docs: perf: Add description for HiSilicon PCIe PMU driver")
Signed-off-by: Bagas Sanjaya <bagasdotme at gmail.com>
---
.../admin-guide/perf/hisi-pcie-pmu.rst | 80 ++++++++++---------
1 file changed, 43 insertions(+), 37 deletions(-)
diff --git a/Documentation/admin-guide/perf/hisi-pcie-pmu.rst b/Documentation/admin-guide/perf/hisi-pcie-pmu.rst
index bae690dddbebfd..54fab870a2aefb 100644
--- a/Documentation/admin-guide/perf/hisi-pcie-pmu.rst
+++ b/Documentation/admin-guide/perf/hisi-pcie-pmu.rst
@@ -48,62 +48,68 @@ Filter options
--------------
1. Target filter
-PMU could only monitor the performance of traffic downstream target Root Ports
-or downstream target Endpoint. PCIe PMU driver support "port" and "bdf"
-interfaces for users, and these two interfaces aren't supported at the same
-time.
--port
-"port" filter can be used in all PCIe PMU events, target Root Port can be
-selected by configuring the 16-bits-bitmap "port". Multi ports can be selected
-for AP-layer-events, and only one port can be selected for TL/DL-layer-events.
+ PMU could only monitor the performance of traffic downstream target Root
+ Ports or downstream target Endpoint. PCIe PMU driver support "port" and
+ "bdf" interfaces for users, and these two interfaces aren't supported at the
+ same time.
-For example, if target Root Port is 0000:00:00.0 (x8 lanes), bit0 of bitmap
-should be set, port=0x1; if target Root Port is 0000:00:04.0 (x4 lanes),
-bit8 is set, port=0x100; if these two Root Ports are both monitored, port=0x101.
+ - port
-Example usage of perf::
+ "port" filter can be used in all PCIe PMU events, target Root Port can be
+ selected by configuring the 16-bits-bitmap "port". Multi ports can be
+ selected for AP-layer-events, and only one port can be selected for
+ TL/DL-layer-events.
- $# perf stat -e hisi_pcie0_core0/rx_mwr_latency,port=0x1/ sleep 5
+ For example, if target Root Port is 0000:00:00.0 (x8 lanes), bit0 of
+ bitmap should be set, port=0x1; if target Root Port is 0000:00:04.0 (x4
+ lanes), bit8 is set, port=0x100; if these two Root Ports are both
+ monitored, port=0x101.
--bdf
+ Example usage of perf::
-"bdf" filter can only be used in bandwidth events, target Endpoint is selected
-by configuring BDF to "bdf". Counter only counts the bandwidth of message
-requested by target Endpoint.
+ $# perf stat -e hisi_pcie0_core0/rx_mwr_latency,port=0x1/ sleep 5
-For example, "bdf=0x3900" means BDF of target Endpoint is 0000:39:00.0.
+ - bdf
-Example usage of perf::
+ "bdf" filter can only be used in bandwidth events, target Endpoint is
+ selected by configuring BDF to "bdf". Counter only counts the bandwidth of
+ message requested by target Endpoint.
- $# perf stat -e hisi_pcie0_core0/rx_mrd_flux,bdf=0x3900/ sleep 5
+ For example, "bdf=0x3900" means BDF of target Endpoint is 0000:39:00.0.
+
+ Example usage of perf::
+
+ $# perf stat -e hisi_pcie0_core0/rx_mrd_flux,bdf=0x3900/ sleep 5
2. Trigger filter
-Event statistics start when the first time TLP length is greater/smaller
-than trigger condition. You can set the trigger condition by writing "trig_len",
-and set the trigger mode by writing "trig_mode". This filter can only be used
-in bandwidth events.
-For example, "trig_len=4" means trigger condition is 2^4 DW, "trig_mode=0"
-means statistics start when TLP length > trigger condition, "trig_mode=1"
-means start when TLP length < condition.
+ Event statistics start when the first time TLP length is greater/smaller
+ than trigger condition. You can set the trigger condition by writing
+ "trig_len", and set the trigger mode by writing "trig_mode". This filter can
+ only be used in bandwidth events.
-Example usage of perf::
+ For example, "trig_len=4" means trigger condition is 2^4 DW, "trig_mode=0"
+ means statistics start when TLP length > trigger condition, "trig_mode=1"
+ means start when TLP length < condition.
- $# perf stat -e hisi_pcie0_core0/rx_mrd_flux,trig_len=0x4,trig_mode=1/ sleep 5
+ Example usage of perf::
+
+ $# perf stat -e hisi_pcie0_core0/rx_mrd_flux,trig_len=0x4,trig_mode=1/ sleep 5
3. Threshold filter
-Counter counts when TLP length within the specified range. You can set the
-threshold by writing "thr_len", and set the threshold mode by writing
-"thr_mode". This filter can only be used in bandwidth events.
-For example, "thr_len=4" means threshold is 2^4 DW, "thr_mode=0" means
-counter counts when TLP length >= threshold, and "thr_mode=1" means counts
-when TLP length < threshold.
+ Counter counts when TLP length within the specified range. You can set the
+ threshold by writing "thr_len", and set the threshold mode by writing
+ "thr_mode". This filter can only be used in bandwidth events.
-Example usage of perf::
+ For example, "thr_len=4" means threshold is 2^4 DW, "thr_mode=0" means
+ counter counts when TLP length >= threshold, and "thr_mode=1" means counts
+ when TLP length < threshold.
- $# perf stat -e hisi_pcie0_core0/rx_mrd_flux,thr_len=0x4,thr_mode=1/ sleep 5
+ Example usage of perf::
+
+ $# perf stat -e hisi_pcie0_core0/rx_mrd_flux,thr_len=0x4,thr_mode=1/ sleep 5
4. TLP Length filter
--
An old man doll... just what I always wanted! - Clara
Thanks.
--
An old man doll... just what I always wanted! - Clara
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