Adding upstream version 4.19.249.upstream/4.19.249upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 92 insertions, 0 deletions

diff --git a/tools/perf/Documentation/perf-mem.txt b/tools/perf/Documentation/perf-mem.txt
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+perf-mem(1)
+===========
+
+NAME
+----
+perf-mem - Profile memory accesses
+
+SYNOPSIS
+--------
+[verse]
+'perf mem' [<options>] (record [<command>] | report)
+
+DESCRIPTION
+-----------
+"perf mem record" runs a command and gathers memory operation data
+from it, into perf.data. Perf record options are accepted and are passed through.
+
+"perf mem report" displays the result. It invokes perf report with the
+right set of options to display a memory access profile. By default, loads
+and stores are sampled. Use the -t option to limit to loads or stores.
+
+Note that on Intel systems the memory latency reported is the use-latency,
+not the pure load (or store latency). Use latency includes any pipeline
+queueing delays in addition to the memory subsystem latency.
+
+OPTIONS
+-------
+<command>...::
+	Any command you can specify in a shell.
+
+-i::
+--input=<file>::
+	Input file name.
+
+-f::
+--force::
+	Don't do ownership validation
+
+-t::
+--type=<type>::
+	Select the memory operation type: load or store (default: load,store)
+
+-D::
+--dump-raw-samples::
+	Dump the raw decoded samples on the screen in a format that is easy to parse with
+	one sample per line.
+
+-x::
+--field-separator=<separator>::
+	Specify the field separator used when dump raw samples (-D option). By default,
+	The separator is the space character.
+
+-C::
+--cpu=<cpu>::
+	Monitor only on the list of CPUs provided. Multiple CPUs can be provided as a
+        comma-separated list with no space: 0,1. Ranges of CPUs are specified with -: 0-2. Default
+        is to monitor all CPUS.
+-U::
+--hide-unresolved::
+	Only display entries resolved to a symbol.
+
+-p::
+--phys-data::
+	Record/Report sample physical addresses
+
+RECORD OPTIONS
+--------------
+-e::
+--event <event>::
+	Event selector. Use 'perf mem record -e list' to list available events.
+
+-K::
+--all-kernel::
+	Configure all used events to run in kernel space.
+
+-U::
+--all-user::
+	Configure all used events to run in user space.
+
+-v::
+--verbose::
+	Be more verbose (show counter open errors, etc)
+
+--ldlat <n>::
+	Specify desired latency for loads event.
+
+In addition, for report all perf report options are valid, and for record
+all perf record options.
+
+SEE ALSO
+--------
+linkperf:perf-record[1], linkperf:perf-report[1]