Adding upstream version 6.6.15.upstream/6.6.15

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

1 files changed, 71 insertions, 0 deletions

diff --git a/tools/perf/Documentation/itrace.txt b/tools/perf/Documentation/itrace.txt
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+		i	synthesize instructions events
+		y	synthesize cycles events
+		b	synthesize branches events (branch misses for Arm SPE)
+		c	synthesize branches events (calls only)
+		r	synthesize branches events (returns only)
+		x	synthesize transactions events
+		w	synthesize ptwrite events
+		p	synthesize power events (incl. PSB events for Intel PT)
+		o	synthesize other events recorded due to the use
+			of aux-output (refer to perf record)
+		I	synthesize interrupt or similar (asynchronous) events
+			(e.g. Intel PT Event Trace)
+		e	synthesize error events
+		d	create a debug log
+		f	synthesize first level cache events
+		m	synthesize last level cache events
+		M	synthesize memory events
+		t	synthesize TLB events
+		a	synthesize remote access events
+		g	synthesize a call chain (use with i or x)
+		G	synthesize a call chain on existing event records
+		l	synthesize last branch entries (use with i or x)
+		L	synthesize last branch entries on existing event records
+		s       skip initial number of events
+		q	quicker (less detailed) decoding
+		A	approximate IPC
+		Z	prefer to ignore timestamps (so-called "timeless" decoding)
+
+	The default is all events i.e. the same as --itrace=iybxwpe,
+	except for perf script where it is --itrace=ce
+
+	In addition, the period (default 100000, except for perf script where it is 1)
+	for instructions events can be specified in units of:
+
+		i	instructions
+		t	ticks
+		ms	milliseconds
+		us	microseconds
+		ns	nanoseconds (default)
+
+	Also the call chain size (default 16, max. 1024) for instructions or
+	transactions events can be specified.
+
+	Also the number of last branch entries (default 64, max. 1024) for
+	instructions or transactions events can be specified.
+
+	Similar to options g and l, size may also be specified for options G and L.
+	On x86, note that G and L work poorly when data has been recorded with
+	large PEBS. Refer linkperf:perf-intel-pt[1] man page for details.
+
+	It is also possible to skip events generated (instructions, branches, transactions,
+	ptwrite, power) at the beginning. This is useful to ignore initialization code.
+
+	--itrace=i0nss1000000
+
+	skips the first million instructions.
+
+	The 'e' option may be followed by flags which affect what errors will or
+	will not be reported. Each flag must be preceded by either '+' or '-'.
+	The flags are:
+		o	overflow
+		l	trace data lost
+
+	If supported, the 'd' option may be followed by flags which affect what
+	debug messages will or will not be logged. Each flag must be preceded
+	by either '+' or '-'. The flags are:
+		a	all perf events
+		e	output only on errors (size configurable - see linkperf:perf-config[1])
+		o	output to stdout
+
+	If supported, the 'q' option may be repeated to increase the effect.