linux-kernel - [PATCH v8 5/5] perf: script: prefer capstone to XED

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Date: Sat, 17 Feb 2024 15:40:46 +0800
From: Changbin Du <changbin.du@...wei.com>
To: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>
CC: Mark Rutland <mark.rutland@....com>, Alexander Shishkin
	<alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>, Namhyung
 Kim <namhyung@...nel.org>, Ian Rogers <irogers@...gle.com>, Adrian Hunter
	<adrian.hunter@...el.com>, <linux-kernel@...r.kernel.org>,
	<linux-perf-users@...r.kernel.org>, Andi Kleen <ak@...ux.intel.com>, Thomas
 Richter <tmricht@...ux.ibm.com>, <changbin.du@...il.com>, Changbin Du
	<changbin.du@...wei.com>
Subject: [PATCH v8 5/5] perf: script: prefer capstone to XED

Now perf can show assembly instructions with libcapstone for x86, and the
capstone is better in general.

Signed-off-by: Changbin Du <changbin.du@...wei.com>

---
v2:
  - update Documentation.  (Adrian Hunter)
  - fix typo.
---
 tools/perf/Documentation/perf-intel-pt.txt | 14 +++++++++-----
 tools/perf/ui/browsers/res_sample.c        |  2 +-
 tools/perf/ui/browsers/scripts.c           |  2 +-
 3 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/tools/perf/Documentation/perf-intel-pt.txt b/tools/perf/Documentation/perf-intel-pt.txt
index 2109690b0d5f..59ab1ff9d75f 100644
--- a/tools/perf/Documentation/perf-intel-pt.txt
+++ b/tools/perf/Documentation/perf-intel-pt.txt
@@ -115,9 +115,13 @@ toggle respectively.
 
 perf script also supports higher level ways to dump instruction traces:
 
+	perf script --insn-trace=disasm
+
+or to use the xed disassembler, which requires installing the xed tool
+(see XED below):
+
 	perf script --insn-trace --xed
 
-Dump all instructions. This requires installing the xed tool (see XED below)
 Dumping all instructions in a long trace can be fairly slow. It is usually better
 to start with higher level decoding, like
 
@@ -130,12 +134,12 @@ or
 and then select a time range of interest. The time range can then be examined
 in detail with
 
-	perf script --time starttime,stoptime --insn-trace --xed
+	perf script --time starttime,stoptime --insn-trace=disasm
 
 While examining the trace it's also useful to filter on specific CPUs using
 the -C option
 
-	perf script --time starttime,stoptime --insn-trace --xed -C 1
+	perf script --time starttime,stoptime --insn-trace=disasm -C 1
 
 Dump all instructions in time range on CPU 1.
 
@@ -1306,7 +1310,7 @@ Without timestamps, --per-thread must be specified to distinguish threads.
 
 perf script can be used to provide an instruction trace
 
- $ perf script --guestkallsyms $KALLSYMS --insn-trace --xed -F+ipc | grep -C10 vmresume | head -21
+ $ perf script --guestkallsyms $KALLSYMS --insn-trace=disasm -F+ipc | grep -C10 vmresume | head -21
        CPU 0/KVM  1440  ffffffff82133cdd __vmx_vcpu_run+0x3d ([kernel.kallsyms])                movq  0x48(%rax), %r9
        CPU 0/KVM  1440  ffffffff82133ce1 __vmx_vcpu_run+0x41 ([kernel.kallsyms])                movq  0x50(%rax), %r10
        CPU 0/KVM  1440  ffffffff82133ce5 __vmx_vcpu_run+0x45 ([kernel.kallsyms])                movq  0x58(%rax), %r11
@@ -1407,7 +1411,7 @@ There were none.
 
 'perf script' can be used to provide an instruction trace showing timestamps
 
- $ perf script -i perf.data.kvm --guestkallsyms $KALLSYMS --insn-trace --xed -F+ipc | grep -C10 vmresume | head -21
+ $ perf script -i perf.data.kvm --guestkallsyms $KALLSYMS --insn-trace=disasm -F+ipc | grep -C10 vmresume | head -21
        CPU 1/KVM 17006 [001] 11500.262865593:  ffffffff82133cdd __vmx_vcpu_run+0x3d ([kernel.kallsyms])                 movq  0x48(%rax), %r9
        CPU 1/KVM 17006 [001] 11500.262865593:  ffffffff82133ce1 __vmx_vcpu_run+0x41 ([kernel.kallsyms])                 movq  0x50(%rax), %r10
        CPU 1/KVM 17006 [001] 11500.262865593:  ffffffff82133ce5 __vmx_vcpu_run+0x45 ([kernel.kallsyms])                 movq  0x58(%rax), %r11
diff --git a/tools/perf/ui/browsers/res_sample.c b/tools/perf/ui/browsers/res_sample.c
index 7cb2d6678039..5f60e515b12e 100644
--- a/tools/perf/ui/browsers/res_sample.c
+++ b/tools/perf/ui/browsers/res_sample.c
@@ -83,7 +83,7 @@ int res_sample_browse(struct res_sample *res_samples, int num_res,
 		     r->tid ? "--tid " : "",
 		     r->tid ? (sprintf(tidbuf, "%d", r->tid), tidbuf) : "",
 		     extra_format,
-		     rstype == A_ASM ? "-F +insn --xed" :
+		     rstype == A_ASM ? "-F +disasm" :
 		     rstype == A_SOURCE ? "-F +srcline,+srccode" : "",
 		     symbol_conf.inline_name ? "--inline" : "",
 		     "--show-lost-events ",
diff --git a/tools/perf/ui/browsers/scripts.c b/tools/perf/ui/browsers/scripts.c
index 50d45054ed6c..e437d7889de6 100644
--- a/tools/perf/ui/browsers/scripts.c
+++ b/tools/perf/ui/browsers/scripts.c
@@ -107,7 +107,7 @@ static int list_scripts(char *script_name, bool *custom,
 	if (evsel)
 		attr_to_script(scriptc.extra_format, &evsel->core.attr);
 	add_script_option("Show individual samples", "", &scriptc);
-	add_script_option("Show individual samples with assembler", "-F +insn --xed",
+	add_script_option("Show individual samples with assembler", "-F +disasm",
 			  &scriptc);
 	add_script_option("Show individual samples with source", "-F +srcline,+srccode",
 			  &scriptc);
-- 
2.25.1