+==========================
ARM Cache Coherent Network
==========================
require "xp" and "vc" as as above plus "port" (device port index),
"dir" (transmit/receive direction), comparator values ("cmp_l"
and "cmp_h") and "mask", being index of the comparator mask.
+
Masks are defined separately from the event description
(due to limited number of the config values) in the "cmp_mask"
directory, with first 8 configurable by user and additional
will be overwritten anyway). In case of this processor being offlined,
the events are migrated to another one and the attribute is updated.
-Example of perf tool use:
+Example of perf tool use::
-/ # perf list | grep ccn
- ccn/cycles/ [Kernel PMU event]
-<...>
- ccn/xp_valid_flit,xp=?,port=?,vc=?,dir=?/ [Kernel PMU event]
-<...>
+ / # perf list | grep ccn
+ ccn/cycles/ [Kernel PMU event]
+ <...>
+ ccn/xp_valid_flit,xp=?,port=?,vc=?,dir=?/ [Kernel PMU event]
+ <...>
-/ # perf stat -a -e ccn/cycles/,ccn/xp_valid_flit,xp=1,port=0,vc=1,dir=1/ \
- sleep 1
+ / # perf stat -a -e ccn/cycles/,ccn/xp_valid_flit,xp=1,port=0,vc=1,dir=1/ \
+ sleep 1
The driver does not support sampling, therefore "perf record" will
not work. Per-task (without "-a") perf sessions are not supported.
+==================================
ARM DynamIQ Shared Unit (DSU) PMU
==================================
The DSU provides a bitmap for a subset of implemented events via hardware
registers. There is no way for the driver to determine if the other events
are available or not. Hence the driver exposes only those events advertised
-by the DSU, in "events" directory under :
+by the DSU, in "events" directory under::
/sys/bus/event_sources/devices/arm_dsu_<N>/
The driver also exposes the CPUs connected to the DSU instance in "associated_cpus".
-e.g usage :
+e.g usage::
perf stat -a -e arm_dsu_0/cycles/
+======================================================
HiSilicon SoC uncore Performance Monitoring Unit (PMU)
======================================================
+
The HiSilicon SoC chip includes various independent system device PMUs
such as L3 cache (L3C), Hydra Home Agent (HHA) and DDRC. These PMUs are
independent and have hardware logic to gather statistics and performance
two HHAs (0 - 1) and four DDRCs (0 - 3), respectively.
HiSilicon SoC uncore PMU driver
----------------------------------------
+-------------------------------
+
Each device PMU has separate registers for event counting, control and
interrupt, and the PMU driver shall register perf PMU drivers like L3C,
HHA and DDRC etc. The available events and configuration options shall
-be described in the sysfs, see :
+be described in the sysfs, see:
+
/sys/devices/hisi_sccl{X}_<l3c{Y}/hha{Y}/ddrc{Y}>/, or
/sys/bus/event_source/devices/hisi_sccl{X}_<l3c{Y}/hha{Y}/ddrc{Y}>.
The "perf list" command shall list the available events from sysfs.
name will appear in event listing as hisi_sccl<sccl-id>_module<index-id>.
where "sccl-id" is the identifier of the SCCL and "index-id" is the index of
module.
+
e.g. hisi_sccl3_l3c0/rd_hit_cpipe is READ_HIT_CPIPE event of L3C index #0 in
SCCL ID #3.
+
e.g. hisi_sccl1_hha0/rx_operations is RX_OPERATIONS event of HHA index #0 in
SCCL ID #1.
The driver also provides a "cpumask" sysfs attribute, which shows the CPU core
ID used to count the uncore PMU event.
-Example usage of perf:
-$# perf list
-hisi_sccl3_l3c0/rd_hit_cpipe/ [kernel PMU event]
-------------------------------------------
-hisi_sccl3_l3c0/wr_hit_cpipe/ [kernel PMU event]
-------------------------------------------
-hisi_sccl1_l3c0/rd_hit_cpipe/ [kernel PMU event]
-------------------------------------------
-hisi_sccl1_l3c0/wr_hit_cpipe/ [kernel PMU event]
-------------------------------------------
-
-$# perf stat -a -e hisi_sccl3_l3c0/rd_hit_cpipe/ sleep 5
-$# perf stat -a -e hisi_sccl3_l3c0/config=0x02/ sleep 5
+Example usage of perf::
+
+ $# perf list
+ hisi_sccl3_l3c0/rd_hit_cpipe/ [kernel PMU event]
+ ------------------------------------------
+ hisi_sccl3_l3c0/wr_hit_cpipe/ [kernel PMU event]
+ ------------------------------------------
+ hisi_sccl1_l3c0/rd_hit_cpipe/ [kernel PMU event]
+ ------------------------------------------
+ hisi_sccl1_l3c0/wr_hit_cpipe/ [kernel PMU event]
+ ------------------------------------------
+
+ $# perf stat -a -e hisi_sccl3_l3c0/rd_hit_cpipe/ sleep 5
+ $# perf stat -a -e hisi_sccl3_l3c0/config=0x02/ sleep 5
The current driver does not support sampling. So "perf record" is unsupported.
Also attach to a task is unsupported as the events are all uncore.
--- /dev/null
+:orphan:
+
+===========================
+Performance monitor support
+===========================
+
+.. toctree::
+ :maxdepth: 1
+
+ hisi-pmu
+ qcom_l2_pmu
+ qcom_l3_pmu
+ arm-ccn
+ xgene-pmu
+ arm_dsu_pmu
+ thunderx2-pmu
+=====================================================================
Qualcomm Technologies Level-2 Cache Performance Monitoring Unit (PMU)
=====================================================================
consisting of one CPU per cluster which will be used to handle all the PMU
events on that cluster.
-Examples for use with perf:
+Examples for use with perf::
perf stat -e l2cache_0/config=0x001/,l2cache_0/config=0x042/ -a sleep 1
+===========================================================================
Qualcomm Datacenter Technologies L3 Cache Performance Monitoring Unit (PMU)
===========================================================================
exposed via the "event" format attribute. In addition to the 32bit physical
counters the driver supports virtual 64bit hardware counters by using hardware
counter chaining. This feature is exposed via the "lc" (long counter) format
-flag. E.g.:
+flag. E.g.::
perf stat -e l3cache_0_0/read-miss,lc/
+=============================================================
Cavium ThunderX2 SoC Performance Monitoring Unit (PMU UNCORE)
=============================================================
The driver does not support sampling, therefore "perf record" will not
work. Per-task perf sessions are also not supported.
-Examples:
+Examples::
-# perf stat -a -e uncore_dmc_0/cnt_cycles/ sleep 1
+ # perf stat -a -e uncore_dmc_0/cnt_cycles/ sleep 1
-# perf stat -a -e \
-uncore_dmc_0/cnt_cycles/,\
-uncore_dmc_0/data_transfers/,\
-uncore_dmc_0/read_txns/,\
-uncore_dmc_0/write_txns/ sleep 1
+ # perf stat -a -e \
+ uncore_dmc_0/cnt_cycles/,\
+ uncore_dmc_0/data_transfers/,\
+ uncore_dmc_0/read_txns/,\
+ uncore_dmc_0/write_txns/ sleep 1
-# perf stat -a -e \
-uncore_l3c_0/read_request/,\
-uncore_l3c_0/read_hit/,\
-uncore_l3c_0/inv_request/,\
-uncore_l3c_0/inv_hit/ sleep 1
+ # perf stat -a -e \
+ uncore_l3c_0/read_request/,\
+ uncore_l3c_0/read_hit/,\
+ uncore_l3c_0/inv_request/,\
+ uncore_l3c_0/inv_hit/ sleep 1
+================================================
APM X-Gene SoC Performance Monitoring Unit (PMU)
================================================
Each perf driver also provides a "cpumask" sysfs attribute, which contains a
single CPU ID of the processor which will be used to handle all the PMU events.
-Example for perf tool use:
+Example for perf tool use::
/ # perf list | grep -e l3c -e iob -e mcb -e mc
l3c0/ackq-full/ [Kernel PMU event]
M: Khuong Dinh <khuong@os.amperecomputing.com>
S: Supported
F: drivers/perf/xgene_pmu.c
-F: Documentation/perf/xgene-pmu.txt
+F: Documentation/perf/xgene-pmu.rst
F: Documentation/devicetree/bindings/perf/apm-xgene-pmu.txt
APTINA CAMERA SENSOR PLL
W: http://www.hisilicon.com
S: Supported
F: drivers/perf/hisilicon
-F: Documentation/perf/hisi-pmu.txt
+F: Documentation/perf/hisi-pmu.rst
HISILICON ROCE DRIVER
M: Lijun Ou <oulijun@huawei.com>
* the slices. User space needs to aggregate to individual counts to provide
* a global picture.
*
- * See Documentation/perf/qcom_l3_pmu.txt for more details.
+ * See Documentation/perf/qcom_l3_pmu.rst for more details.
*
* Copyright (c) 2015-2017, The Linux Foundation. All rights reserved.
*/
projects / linux.git / commitdiff