The "auxtrace_info" and "auxtrace" functions are not set in "tool" member of
"annotate". As a result, perf annotate does not support parsing itrace data.
Before:
# perf record -e arm_spe_0/branch_filter=1/ -a sleep 1
[ perf record: Woken up 9 times to write data ]
[ perf record: Captured and wrote 20.874 MB perf.data ]
# perf annotate --stdio
Error:
The perf.data data has no samples!
Solution:
1.Add itrace options in help,
2.Set hook functions of "auxtrace_info" and "auxtrace" in perf_tool.
After:
# perf record --all-user -e arm_spe_0/branch_filter=1/ ls
Couldn't synthesize bpf events.
perf.data
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.010 MB perf.data ]
# perf annotate --stdio
Percent | Source code & Disassembly of libc-2.28.so for branch-miss (1 samples, percent: local period)
------------------------------------------------------------------------------------------------------------
:
:
:
: Disassembly of section .text:
:
: 0000000000066180 <__getdelim@@GLIBC_2.17>:
0.00 : 66180: stp x29, x30, [sp, #-96]!
0.00 : 66184: cmp x0, #0x0
0.00 : 66188: ccmp x1, #0x0, #0x4, ne // ne = any
0.00 : 6618c: mov x29, sp
0.00 : 66190: stp x24, x25, [sp, #56]
0.00 : 66194: stp x26, x27, [sp, #72]
0.00 : 66198: str x28, [sp, #88]
0.00 : 6619c: b.eq 66450 <__getdelim@@GLIBC_2.17+0x2d0> // b.none
0.00 : 661a0: stp x22, x23, [x29, #40]
0.00 : 661a4: mov x22, x1
0.00 : 661a8: ldr w1, [x3]
0.00 : 661ac: mov w23, w2
0.00 : 661b0: stp x20, x21, [x29, #24]
0.00 : 661b4: mov x20, x3
0.00 : 661b8: mov x21, x0
0.00 : 661bc: tbnz w1, #15, 66360 <__getdelim@@GLIBC_2.17+0x1e0>
0.00 : 661c0: ldr x0, [x3, #136]
0.00 : 661c4: ldr x2, [x0, #8]
0.00 : 661c8: str x19, [x29, #16]
0.00 : 661cc: mrs x19, tpidr_el0
0.00 : 661d0: sub x19, x19, #0x700
0.00 : 661d4: cmp x2, x19
0.00 : 661d8: b.eq 663f0 <__getdelim@@GLIBC_2.17+0x270> // b.none
0.00 : 661dc: mov w1, #0x1 // #1
0.00 : 661e0: ldaxr w2, [x0]
0.00 : 661e4: cmp w2, #0x0
0.00 : 661e8: b.ne 661f4 <__getdelim@@GLIBC_2.17+0x74> // b.any
0.00 : 661ec: stxr w3, w1, [x0]
0.00 : 661f0: cbnz w3, 661e0 <__getdelim@@GLIBC_2.17+0x60>
0.00 : 661f4: b.ne 66448 <__getdelim@@GLIBC_2.17+0x2c8> // b.any
0.00 : 661f8: ldr x0, [x20, #136]
0.00 : 661fc: ldr w1, [x20]
0.00 : 66200: ldr w2, [x0, #4]
0.00 : 66204: str x19, [x0, #8]
0.00 : 66208: add w2, w2, #0x1
0.00 : 6620c: str w2, [x0, #4]
0.00 : 66210: tbnz w1, #5, 66388 <__getdelim@@GLIBC_2.17+0x208>
0.00 : 66214: ldr x19, [x29, #16]
0.00 : 66218: ldr x0, [x21]
0.00 : 6621c: cbz x0, 66228 <__getdelim@@GLIBC_2.17+0xa8>
0.00 : 66220: ldr x0, [x22]
0.00 : 66224: cbnz x0, 6623c <__getdelim@@GLIBC_2.17+0xbc>
0.00 : 66228: mov x0, #0x78 // #120
0.00 : 6622c: str x0, [x22]
0.00 : 66230: bl 20710 <malloc@plt>
0.00 : 66234: str x0, [x21]
0.00 : 66238: cbz x0, 66428 <__getdelim@@GLIBC_2.17+0x2a8>
0.00 : 6623c: ldr x27, [x20, #8]
0.00 : 66240: str x19, [x29, #16]
0.00 : 66244: ldr x19, [x20, #16]
0.00 : 66248: sub x19, x19, x27
0.00 : 6624c: cmp x19, #0x0
0.00 : 66250: b.le 66398 <__getdelim@@GLIBC_2.17+0x218>
0.00 : 66254: mov x25, #0x0 // #0
0.00 : 66258: b 662d8 <__getdelim@@GLIBC_2.17+0x158>
0.00 : 6625c: nop
0.00 : 66260: add x24, x19, x25
0.00 : 66264: ldr x3, [x22]
0.00 : 66268: add x26, x24, #0x1
0.00 : 6626c: ldr x0, [x21]
0.00 : 66270: cmp x3, x26
0.00 : 66274: b.cs 6629c <__getdelim@@GLIBC_2.17+0x11c> // b.hs, b.nlast
0.00 : 66278: lsl x3, x3, #1
0.00 : 6627c: cmp x3, x26
0.00 : 66280: csel x26, x3, x26, cs // cs = hs, nlast
0.00 : 66284: mov x1, x26
0.00 : 66288: bl 206f0 <realloc@plt>
0.00 : 6628c: cbz x0, 66438 <__getdelim@@GLIBC_2.17+0x2b8>
0.00 : 66290: str x0, [x21]
0.00 : 66294: ldr x27, [x20, #8]
0.00 : 66298: str x26, [x22]
0.00 : 6629c: mov x2, x19
0.00 : 662a0: mov x1, x27
0.00 : 662a4: add x0, x0, x25
0.00 : 662a8: bl 87390 <explicit_bzero@@GLIBC_2.25+0x50>
0.00 : 662ac: ldr x0, [x20, #8]
0.00 : 662b0: add x19, x0, x19
0.00 : 662b4: str x19, [x20, #8]
0.00 : 662b8: cbnz x28, 66410 <__getdelim@@GLIBC_2.17+0x290>
0.00 : 662bc: mov x0, x20
0.00 : 662c0: bl 73b80 <__underflow@@GLIBC_2.17>
0.00 : 662c4: cmn w0, #0x1
0.00 : 662c8: b.eq 66410 <__getdelim@@GLIBC_2.17+0x290> // b.none
0.00 : 662cc: ldp x27, x19, [x20, #8]
0.00 : 662d0: mov x25, x24
0.00 : 662d4: sub x19, x19, x27
0.00 : 662d8: mov x2, x19
0.00 : 662dc: mov w1, w23
0.00 : 662e0: mov x0, x27
0.00 : 662e4: bl 807b0 <memchr@@GLIBC_2.17>
0.00 : 662e8: cmp x0, #0x0
0.00 : 662ec: mov x28, x0
0.00 : 662f0: sub x0, x0, x27
0.00 : 662f4: csinc x19, x19, x0, eq // eq = none
0.00 : 662f8: mov x0, #0x7fffffffffffffff // #9223372036854775807
0.00 : 662fc: sub x0, x0, x25
0.00 : 66300: cmp x19, x0
0.00 : 66304: b.lt 66260 <__getdelim@@GLIBC_2.17+0xe0> // b.tstop
0.00 : 66308: adrp x0, 17f000 <sys_sigabbrev@@GLIBC_2.17+0x320>
0.00 : 6630c: ldr x0, [x0, #3624]
0.00 : 66310: mrs x2, tpidr_el0
0.00 : 66314: ldr x19, [x29, #16]
0.00 : 66318: mov w3, #0x4b // #75
0.00 : 6631c: ldr w1, [x20]
0.00 : 66320: mov x24, #0xffffffffffffffff // #-1
0.00 : 66324: str w3, [x2, x0]
0.00 : 66328: tbnz w1, #15, 66340 <__getdelim@@GLIBC_2.17+0x1c0>
0.00 : 6632c: ldr x0, [x20, #136]
0.00 : 66330: ldr w1, [x0, #4]
0.00 : 66334: sub w1, w1, #0x1
0.00 : 66338: str w1, [x0, #4]
0.00 : 6633c: cbz w1, 663b8 <__getdelim@@GLIBC_2.17+0x238>
0.00 : 66340: mov x0, x24
0.00 : 66344: ldr x28, [sp, #88]
0.00 : 66348: ldp x20, x21, [x29, #24]
0.00 : 6634c: ldp x22, x23, [x29, #40]
0.00 : 66350: ldp x24, x25, [sp, #56]
0.00 : 66354: ldp x26, x27, [sp, #72]
0.00 : 66358: ldp x29, x30, [sp], #96
0.00 : 6635c: ret
100.00 : 66360: tbz w1, #5, 66218 <__getdelim@@GLIBC_2.17+0x98>
0.00 : 66364: ldp x20, x21, [x29, #24]
0.00 : 66368: mov x24, #0xffffffffffffffff // #-1
0.00 : 6636c: ldp x22, x23, [x29, #40]
0.00 : 66370: mov x0, x24
0.00 : 66374: ldp x24, x25, [sp, #56]
0.00 : 66378: ldp x26, x27, [sp, #72]
0.00 : 6637c: ldr x28, [sp, #88]
0.00 : 66380: ldp x29, x30, [sp], #96
0.00 : 66384: ret
0.00 : 66388: mov x24, #0xffffffffffffffff // #-1
0.00 : 6638c: ldr x19, [x29, #16]
0.00 : 66390: b 66328 <__getdelim@@GLIBC_2.17+0x1a8>
0.00 : 66394: nop
0.00 : 66398: mov x0, x20
0.00 : 6639c: bl 73b80 <__underflow@@GLIBC_2.17>
0.00 : 663a0: cmn w0, #0x1
0.00 : 663a4: b.eq 66438 <__getdelim@@GLIBC_2.17+0x2b8> // b.none
0.00 : 663a8: ldp x27, x19, [x20, #8]
0.00 : 663ac: sub x19, x19, x27
0.00 : 663b0: b 66254 <__getdelim@@GLIBC_2.17+0xd4>
0.00 : 663b4: nop
0.00 : 663b8: str xzr, [x0, #8]
0.00 : 663bc: ldxr w2, [x0]
0.00 : 663c0: stlxr w3, w1, [x0]
0.00 : 663c4: cbnz w3, 663bc <__getdelim@@GLIBC_2.17+0x23c>
0.00 : 663c8: cmp w2, #0x1
0.00 : 663cc: b.le 66340 <__getdelim@@GLIBC_2.17+0x1c0>
0.00 : 663d0: mov x1, #0x81 // #129
0.00 : 663d4: mov x2, #0x1 // #1
0.00 : 663d8: mov x3, #0x0 // #0
0.00 : 663dc: mov x8, #0x62 // #98
0.00 : 663e0: svc #0x0
0.00 : 663e4: ldp x20, x21, [x29, #24]
0.00 : 663e8: ldp x22, x23, [x29, #40]
0.00 : 663ec: b 66370 <__getdelim@@GLIBC_2.17+0x1f0>
0.00 : 663f0: ldr w2, [x0, #4]
0.00 : 663f4: add w2, w2, #0x1
0.00 : 663f8: str w2, [x0, #4]
0.00 : 663fc: tbz w1, #5, 66214 <__getdelim@@GLIBC_2.17+0x94>
0.00 : 66400: mov x24, #0xffffffffffffffff // #-1
0.00 : 66404: ldr x19, [x29, #16]
0.00 : 66408: b 66330 <__getdelim@@GLIBC_2.17+0x1b0>
0.00 : 6640c: nop
0.00 : 66410: ldr x0, [x21]
0.00 : 66414: strb wzr, [x0, x24]
0.00 : 66418: ldr w1, [x20]
0.00 : 6641c: ldr x19, [x29, #16]
0.00 : 66420: b 66328 <__getdelim@@GLIBC_2.17+0x1a8>
0.00 : 66424: nop
0.00 : 66428: mov x24, #0xffffffffffffffff // #-1
0.00 : 6642c: ldr w1, [x20]
0.00 : 66430: b 66328 <__getdelim@@GLIBC_2.17+0x1a8>
0.00 : 66434: nop
0.00 : 66438: mov x24, #0xffffffffffffffff // #-1
0.00 : 6643c: ldr w1, [x20]
0.00 : 66440: ldr x19, [x29, #16]
0.00 : 66444: b 66328 <__getdelim@@GLIBC_2.17+0x1a8>
0.00 : 66448: bl e3ba0 <pthread_setcanceltype@@GLIBC_2.17+0x30>
0.00 : 6644c: b 661f8 <__getdelim@@GLIBC_2.17+0x78>
0.00 : 66450: adrp x0, 17f000 <sys_sigabbrev@@GLIBC_2.17+0x320>
0.00 : 66454: ldr x0, [x0, #3624]
0.00 : 66458: mrs x1, tpidr_el0
0.00 : 6645c: mov w2, #0x16 // #22
0.00 : 66460: mov x24, #0xffffffffffffffff // #-1
0.00 : 66464: str w2, [x1, x0]
0.00 : 66468: b 66370 <__getdelim@@GLIBC_2.17+0x1f0>
0.00 : 6646c: ldr w1, [x20]
0.00 : 66470: mov x4, x0
0.00 : 66474: tbnz w1, #15, 6648c <__getdelim@@GLIBC_2.17+0x30c>
0.00 : 66478: ldr x0, [x20, #136]
0.00 : 6647c: ldr w1, [x0, #4]
0.00 : 66480: sub w1, w1, #0x1
0.00 : 66484: str w1, [x0, #4]
0.00 : 66488: cbz w1, 66494 <__getdelim@@GLIBC_2.17+0x314>
0.00 : 6648c: mov x0, x4
0.00 : 66490: bl 20e40 <gnu_get_libc_version@@GLIBC_2.17+0x130>
0.00 : 66494: str xzr, [x0, #8]
0.00 : 66498: ldxr w2, [x0]
0.00 : 6649c: stlxr w3, w1, [x0]
0.00 : 664a0: cbnz w3, 66498 <__getdelim@@GLIBC_2.17+0x318>
0.00 : 664a4: cmp w2, #0x1
0.00 : 664a8: b.le 6648c <__getdelim@@GLIBC_2.17+0x30c>
0.00 : 664ac: mov x1, #0x81 // #129
0.00 : 664b0: mov x2, #0x1 // #1
0.00 : 664b4: mov x3, #0x0 // #0
0.00 : 664b8: mov x8, #0x62 // #98
0.00 : 664bc: svc #0x0
0.00 : 664c0: b 6648c <__getdelim@@GLIBC_2.17+0x30c>
Signed-off-by: Yang Jihong <[email protected]>
---
Changes since v2:
- Updating tools/perf/Documentation/perf-annotate.txt.
- Add test result to commit message.
Changes since v1:
- Adjust spaces to maintain alignment in "tool".
tools/perf/Documentation/perf-annotate.txt | 7 +++++++
tools/perf/builtin-annotate.c | 10 ++++++++++
2 files changed, 17 insertions(+)
diff --git a/tools/perf/Documentation/perf-annotate.txt b/tools/perf/Documentation/perf-annotate.txt
index 80c1be5d566c..33c2521cba4a 100644
--- a/tools/perf/Documentation/perf-annotate.txt
+++ b/tools/perf/Documentation/perf-annotate.txt
@@ -58,6 +58,13 @@ OPTIONS
--ignore-vmlinux::
Ignore vmlinux files.
+--itrace::
+ Options for decoding instruction tracing data. The options are:
+
+include::itrace.txt[]
+
+ To disable decoding entirely, use --no-itrace.
+
-m::
--modules::
Load module symbols. WARNING: use only with -k and LIVE kernel.
diff --git a/tools/perf/builtin-annotate.c b/tools/perf/builtin-annotate.c
index 49627a7bed7c..8f87658eff31 100644
--- a/tools/perf/builtin-annotate.c
+++ b/tools/perf/builtin-annotate.c
@@ -474,6 +474,8 @@ int cmd_annotate(int argc, const char **argv)
.attr = perf_event__process_attr,
.build_id = perf_event__process_build_id,
.tracing_data = perf_event__process_tracing_data,
+ .auxtrace_info = perf_event__process_auxtrace_info,
+ .auxtrace = perf_event__process_auxtrace,
.feature = process_feature_event,
.ordered_events = true,
.ordering_requires_timestamps = true,
@@ -483,6 +485,9 @@ int cmd_annotate(int argc, const char **argv)
struct perf_data data = {
.mode = PERF_DATA_MODE_READ,
};
+ struct itrace_synth_opts itrace_synth_opts = {
+ .set = 0,
+ };
struct option options[] = {
OPT_STRING('i', "input", &input_name, "file",
"input file name"),
@@ -547,6 +552,9 @@ int cmd_annotate(int argc, const char **argv)
OPT_CALLBACK(0, "percent-type", &annotate.opts, "local-period",
"Set percent type local/global-period/hits",
annotate_parse_percent_type),
+ OPT_CALLBACK_OPTARG(0, "itrace", &itrace_synth_opts, NULL, "opts",
+ "Instruction Tracing options\n" ITRACE_HELP,
+ itrace_parse_synth_opts),
OPT_END()
};
@@ -591,6 +599,8 @@ int cmd_annotate(int argc, const char **argv)
if (IS_ERR(annotate.session))
return PTR_ERR(annotate.session);
+ annotate.session->itrace_synth_opts = &itrace_synth_opts;
+
annotate.has_br_stack = perf_header__has_feat(&annotate.session->header,
HEADER_BRANCH_STACK);
--
2.30.GIT
Hi Jihong,
Loop in Adrain to be aware this AUX trace change.
On Tue, Jun 15, 2021 at 10:40:36AM +0800, Yang Jihong wrote:
> The "auxtrace_info" and "auxtrace" functions are not set in "tool" member of
> "annotate". As a result, perf annotate does not support parsing itrace data.
>
> Before:
>
> # perf record -e arm_spe_0/branch_filter=1/ -a sleep 1
> [ perf record: Woken up 9 times to write data ]
> [ perf record: Captured and wrote 20.874 MB perf.data ]
> # perf annotate --stdio
> Error:
> The perf.data data has no samples!
>
> Solution:
> 1.Add itrace options in help,
> 2.Set hook functions of "auxtrace_info" and "auxtrace" in perf_tool.
>
> After:
>
> # perf record --all-user -e arm_spe_0/branch_filter=1/ ls
> Couldn't synthesize bpf events.
> perf.data
> [ perf record: Woken up 1 times to write data ]
> [ perf record: Captured and wrote 0.010 MB perf.data ]
> # perf annotate --stdio
> Percent | Source code & Disassembly of libc-2.28.so for branch-miss (1 samples, percent: local period)
> ------------------------------------------------------------------------------------------------------------
> :
> :
> :
> : Disassembly of section .text:
> :
> : 0000000000066180 <__getdelim@@GLIBC_2.17>:
> 0.00 : 66180: stp x29, x30, [sp, #-96]!
> 0.00 : 66184: cmp x0, #0x0
> 0.00 : 66188: ccmp x1, #0x0, #0x4, ne // ne = any
> 0.00 : 6618c: mov x29, sp
> 0.00 : 66190: stp x24, x25, [sp, #56]
> 0.00 : 66194: stp x26, x27, [sp, #72]
> 0.00 : 66198: str x28, [sp, #88]
> 0.00 : 6619c: b.eq 66450 <__getdelim@@GLIBC_2.17+0x2d0> // b.none
> 0.00 : 661a0: stp x22, x23, [x29, #40]
[...]
Nitpick: the above example is not typical for annotation, since it
doesn't show any C source code with samples. At my side, I tested this
patch and confirmed the patch works well with below commands:
# gcc -ggdb -O0 -o task_migration task_migration.c
# perf record -e cs_etm/@tmc_etr0/u --per-thread ./task_migration
# perf annotate --itrace=i1000 --stdio
The complete annotation result can be reviewed at [1].
Thus for this patch:
Tested-by: Leo Yan <[email protected]>
[1] https://paste.ubuntu.com/p/pHz74MYRPJ/
[...]
Hello, Leo and Arnaldo,
On 2021/6/15 12:04, Leo Yan wrote:
> Hi Jihong,
>
> Loop in Adrain to be aware this AUX trace change.
>
> On Tue, Jun 15, 2021 at 10:40:36AM +0800, Yang Jihong wrote:
>> The "auxtrace_info" and "auxtrace" functions are not set in "tool" member of
>> "annotate". As a result, perf annotate does not support parsing itrace data.
>>
>> Before:
>>
>> # perf record -e arm_spe_0/branch_filter=1/ -a sleep 1
>> [ perf record: Woken up 9 times to write data ]
>> [ perf record: Captured and wrote 20.874 MB perf.data ]
>> # perf annotate --stdio
>> Error:
>> The perf.data data has no samples!
>>
>> Solution:
>> 1.Add itrace options in help,
>> 2.Set hook functions of "auxtrace_info" and "auxtrace" in perf_tool.
>>
>> After:
>>
>> # perf record --all-user -e arm_spe_0/branch_filter=1/ ls
>> Couldn't synthesize bpf events.
>> perf.data
>> [ perf record: Woken up 1 times to write data ]
>> [ perf record: Captured and wrote 0.010 MB perf.data ]
>> # perf annotate --stdio
>
>> Percent | Source code & Disassembly of libc-2.28.so for branch-miss (1 samples, percent: local period)
>> ------------------------------------------------------------------------------------------------------------
>> :
>> :
>> :
>> : Disassembly of section .text:
>> :
>> : 0000000000066180 <__getdelim@@GLIBC_2.17>:
>> 0.00 : 66180: stp x29, x30, [sp, #-96]!
>> 0.00 : 66184: cmp x0, #0x0
>> 0.00 : 66188: ccmp x1, #0x0, #0x4, ne // ne = any
>> 0.00 : 6618c: mov x29, sp
>> 0.00 : 66190: stp x24, x25, [sp, #56]
>> 0.00 : 66194: stp x26, x27, [sp, #72]
>> 0.00 : 66198: str x28, [sp, #88]
>> 0.00 : 6619c: b.eq 66450 <__getdelim@@GLIBC_2.17+0x2d0> // b.none
>> 0.00 : 661a0: stp x22, x23, [x29, #40]
>
> [...]
>
> Nitpick: the above example is not typical for annotation, since it
> doesn't show any C source code with samples. At my side, I tested this
> patch and confirmed the patch works well with below commands:
>
> # gcc -ggdb -O0 -o task_migration task_migration.c
> # perf record -e cs_etm/@tmc_etr0/u --per-thread ./task_migration
> # perf annotate --itrace=i1000 --stdio
>
> The complete annotation result can be reviewed at [1].
>
> Thus for this patch:
>
> Tested-by: Leo Yan <[email protected]>
>
> [1] https://paste.ubuntu.com/p/pHz74MYRPJ/
>
> [...]
> .
>
Thank you very much for the detailed testing of this patch :)
Yes, this example may not be well written.
Arnaldo, please check whether the commit message needs to be modified.
If yes, I will resubmit a new v4 patch
Thanks,
Jihong
On 15/06/21 5:40 am, Yang Jihong wrote:
> The "auxtrace_info" and "auxtrace" functions are not set in "tool" member of
> "annotate". As a result, perf annotate does not support parsing itrace data.
>
> Before:
>
> # perf record -e arm_spe_0/branch_filter=1/ -a sleep 1
> [ perf record: Woken up 9 times to write data ]
> [ perf record: Captured and wrote 20.874 MB perf.data ]
> # perf annotate --stdio
> Error:
> The perf.data data has no samples!
>
> Solution:
> 1.Add itrace options in help,
> 2.Set hook functions of "auxtrace_info" and "auxtrace" in perf_tool.
>
> After:
>
> # perf record --all-user -e arm_spe_0/branch_filter=1/ ls
> Couldn't synthesize bpf events.
> perf.data
> [ perf record: Woken up 1 times to write data ]
> [ perf record: Captured and wrote 0.010 MB perf.data ]
> # perf annotate --stdio
> Percent | Source code & Disassembly of libc-2.28.so for branch-miss (1 samples, percent: local period)
> ------------------------------------------------------------------------------------------------------------
> :
> :
> :
> : Disassembly of section .text:
> :
> : 0000000000066180 <__getdelim@@GLIBC_2.17>:
> 0.00 : 66180: stp x29, x30, [sp, #-96]!
> 0.00 : 66184: cmp x0, #0x0
> 0.00 : 66188: ccmp x1, #0x0, #0x4, ne // ne = any
> 0.00 : 6618c: mov x29, sp
> 0.00 : 66190: stp x24, x25, [sp, #56]
>
> Signed-off-by: Yang Jihong <[email protected]>
> ---
>
> Changes since v2:
> - Updating tools/perf/Documentation/perf-annotate.txt.
> - Add test result to commit message.
>
> Changes since v1:
> - Adjust spaces to maintain alignment in "tool".
>
> tools/perf/Documentation/perf-annotate.txt | 7 +++++++
> tools/perf/builtin-annotate.c | 10 ++++++++++
> 2 files changed, 17 insertions(+)
>
> diff --git a/tools/perf/Documentation/perf-annotate.txt b/tools/perf/Documentation/perf-annotate.txt
> index 80c1be5d566c..33c2521cba4a 100644
> --- a/tools/perf/Documentation/perf-annotate.txt
> +++ b/tools/perf/Documentation/perf-annotate.txt
> @@ -58,6 +58,13 @@ OPTIONS
> --ignore-vmlinux::
> Ignore vmlinux files.
>
> +--itrace::
> + Options for decoding instruction tracing data. The options are:
> +
> +include::itrace.txt[]
> +
> + To disable decoding entirely, use --no-itrace.
> +
> -m::
> --modules::
> Load module symbols. WARNING: use only with -k and LIVE kernel.
> diff --git a/tools/perf/builtin-annotate.c b/tools/perf/builtin-annotate.c
> index 49627a7bed7c..8f87658eff31 100644
> --- a/tools/perf/builtin-annotate.c
> +++ b/tools/perf/builtin-annotate.c
> @@ -474,6 +474,8 @@ int cmd_annotate(int argc, const char **argv)
> .attr = perf_event__process_attr,
> .build_id = perf_event__process_build_id,
> .tracing_data = perf_event__process_tracing_data,
> + .auxtrace_info = perf_event__process_auxtrace_info,
> + .auxtrace = perf_event__process_auxtrace,
For sample mode, Intel PT also needs:
.id_index = perf_event__process_id_index,
> .feature = process_feature_event,
> .ordered_events = true,
> .ordering_requires_timestamps = true,
> @@ -483,6 +485,9 @@ int cmd_annotate(int argc, const char **argv)
> struct perf_data data = {
> .mode = PERF_DATA_MODE_READ,
> };
> + struct itrace_synth_opts itrace_synth_opts = {
> + .set = 0,
> + };
> struct option options[] = {
> OPT_STRING('i', "input", &input_name, "file",
> "input file name"),
> @@ -547,6 +552,9 @@ int cmd_annotate(int argc, const char **argv)
> OPT_CALLBACK(0, "percent-type", &annotate.opts, "local-period",
> "Set percent type local/global-period/hits",
> annotate_parse_percent_type),
> + OPT_CALLBACK_OPTARG(0, "itrace", &itrace_synth_opts, NULL, "opts",
> + "Instruction Tracing options\n" ITRACE_HELP,
> + itrace_parse_synth_opts),
>
> OPT_END()
> };
> @@ -591,6 +599,8 @@ int cmd_annotate(int argc, const char **argv)
> if (IS_ERR(annotate.session))
> return PTR_ERR(annotate.session);
>
> + annotate.session->itrace_synth_opts = &itrace_synth_opts;
> +
> annotate.has_br_stack = perf_header__has_feat(&annotate.session->header,
> HEADER_BRANCH_STACK);
>
>
Hello, Adrain,
On 2021/6/15 16:22, Adrian Hunter wrote:
> On 15/06/21 5:40 am, Yang Jihong wrote:
>> The "auxtrace_info" and "auxtrace" functions are not set in "tool" member of
>> "annotate". As a result, perf annotate does not support parsing itrace data.
>>
>> Before:
>>
>> # perf record -e arm_spe_0/branch_filter=1/ -a sleep 1
>> [ perf record: Woken up 9 times to write data ]
>> [ perf record: Captured and wrote 20.874 MB perf.data ]
>> # perf annotate --stdio
>> Error:
>> The perf.data data has no samples!
>>
>> Solution:
>> 1.Add itrace options in help,
>> 2.Set hook functions of "auxtrace_info" and "auxtrace" in perf_tool.
>>
>> After:
>>
>> # perf record --all-user -e arm_spe_0/branch_filter=1/ ls
>> Couldn't synthesize bpf events.
>> perf.data
>> [ perf record: Woken up 1 times to write data ]
>> [ perf record: Captured and wrote 0.010 MB perf.data ]
>> # perf annotate --stdio
>> Percent | Source code & Disassembly of libc-2.28.so for branch-miss (1 samples, percent: local period)
>> ------------------------------------------------------------------------------------------------------------
>> :
>> :
>> :
>> : Disassembly of section .text:
>> :
>> : 0000000000066180 <__getdelim@@GLIBC_2.17>:
>> 0.00 : 66180: stp x29, x30, [sp, #-96]!
>> 0.00 : 66184: cmp x0, #0x0
>> 0.00 : 66188: ccmp x1, #0x0, #0x4, ne // ne = any
>> 0.00 : 6618c: mov x29, sp
>> 0.00 : 66190: stp x24, x25, [sp, #56]
>>
>> Signed-off-by: Yang Jihong <[email protected]>
>> ---
>>
>> Changes since v2:
>> - Updating tools/perf/Documentation/perf-annotate.txt.
>> - Add test result to commit message.
>>
>> Changes since v1:
>> - Adjust spaces to maintain alignment in "tool".
>>
>> tools/perf/Documentation/perf-annotate.txt | 7 +++++++
>> tools/perf/builtin-annotate.c | 10 ++++++++++
>> 2 files changed, 17 insertions(+)
>>
>> diff --git a/tools/perf/Documentation/perf-annotate.txt b/tools/perf/Documentation/perf-annotate.txt
>> index 80c1be5d566c..33c2521cba4a 100644
>> --- a/tools/perf/Documentation/perf-annotate.txt
>> +++ b/tools/perf/Documentation/perf-annotate.txt
>> @@ -58,6 +58,13 @@ OPTIONS
>> --ignore-vmlinux::
>> Ignore vmlinux files.
>>
>> +--itrace::
>> + Options for decoding instruction tracing data. The options are:
>> +
>> +include::itrace.txt[]
>> +
>> + To disable decoding entirely, use --no-itrace.
>> +
>> -m::
>> --modules::
>> Load module symbols. WARNING: use only with -k and LIVE kernel.
>> diff --git a/tools/perf/builtin-annotate.c b/tools/perf/builtin-annotate.c
>> index 49627a7bed7c..8f87658eff31 100644
>> --- a/tools/perf/builtin-annotate.c
>> +++ b/tools/perf/builtin-annotate.c
>> @@ -474,6 +474,8 @@ int cmd_annotate(int argc, const char **argv)
>> .attr = perf_event__process_attr,
>> .build_id = perf_event__process_build_id,
>> .tracing_data = perf_event__process_tracing_data,
>> + .auxtrace_info = perf_event__process_auxtrace_info,
>> + .auxtrace = perf_event__process_auxtrace,
>
> For sample mode, Intel PT also needs:
>
> .id_index = perf_event__process_id_index,
>
Thanks for testing this patch in the Intel PT environment.
OK, I add the id_index processing function to the v4 patch:
https://lore.kernel.org/patchwork/patch/1446727/
Thanks,
Jihong