diff mbox series

[3/3] perf scripts python: arm-cs-trace-disasm.py: do not ignore disam first sample

Message ID 20231214123304.34087-4-tianruidong@linux.alibaba.com
State New
Headers
Series perf scripts python: arm-cs-trace-disasm.py: |

Commit Message

Ruidong Tian Dec. 14, 2023, 12:33 p.m. UTC 
  arm-cs-trace-disasm ignore disam the first branch sample, For example as
follow, the instructions beteween 0x0000ffffae878750 and
0x0000ffffae878754 is lose:

  ARM CoreSight Trace Data Assembler Dump
  Event type: branches:uH
  Sample = { cpu: 0000 addr: 0x0000ffffae878750 phys_addr: 0x0000000000000000 ip: 0x0000000000000000 pid: 4003489 tid: 4003489 period: 1 time: 26765151766034 }
  Event type: branches:uH
  Sample = { cpu: 0000 addr: 0x0000000000000000 phys_addr: 0x0000000000000000 ip: 0x0000ffffae878754 pid: 4003489 tid: 4003489 period: 1 time: 26765151766034 }

Initialize cpu_data earlier to fix it:

  ARM CoreSight Trace Data Assembler Dump
  Event type: branches:uH
  Sample = { cpu: 0000 addr: 0x0000000000000000 phys_addr: 0x0000000000000000 ip: 0x0000ffffae878754 pid: 4003489 tid: 4003489 period: 1 time: 26765151766034 }
        0000000000028740 <ioctl>: (base address is 0x0000ffffae850000)
           28750: b13ffc1f      cmn     x0, #4095
           28754: 54000042      b.hs    0x2875c <ioctl+0x1c>
            test 4003489/4003489 [0000]     26765.151766034  __GI___ioctl+0x14                        /usr/lib64/libc-2.32.so
  Event type: branches:uH
  Sample = { cpu: 0000 addr: 0x0000ffffa67535ac phys_addr: 0x0000000000000000 ip: 0x0000000000000000 pid: 4003489 tid: 4003489 period: 1 time: 26765151766034 }

Signed-off-by: Ruidong Tian <tianruidong@linux.alibaba.com>
---
 .../scripts/python/arm-cs-trace-disasm.py     | 21 ++++++++++---------
 1 file changed, 11 insertions(+), 10 deletions(-)

Comments

Arnaldo Carvalho de Melo Dec. 18, 2023, 8:28 p.m. UTC | #1 
Em Thu, Dec 14, 2023 at 08:33:04PM +0800, Ruidong Tian escreveu:
> arm-cs-trace-disasm ignore disam the first branch sample, For example as
> follow, the instructions beteween 0x0000ffffae878750 and
> 0x0000ffffae878754 is lose:

Leo, Mathieu, Tor, Al, can you guys take a look and provide an Acked or
Reviewed-by tag?

Thanks,

- Arnaldo
 
>   ARM CoreSight Trace Data Assembler Dump
>   Event type: branches:uH
>   Sample = { cpu: 0000 addr: 0x0000ffffae878750 phys_addr: 0x0000000000000000 ip: 0x0000000000000000 pid: 4003489 tid: 4003489 period: 1 time: 26765151766034 }
>   Event type: branches:uH
>   Sample = { cpu: 0000 addr: 0x0000000000000000 phys_addr: 0x0000000000000000 ip: 0x0000ffffae878754 pid: 4003489 tid: 4003489 period: 1 time: 26765151766034 }
> 
> Initialize cpu_data earlier to fix it:
> 
>   ARM CoreSight Trace Data Assembler Dump
>   Event type: branches:uH
>   Sample = { cpu: 0000 addr: 0x0000000000000000 phys_addr: 0x0000000000000000 ip: 0x0000ffffae878754 pid: 4003489 tid: 4003489 period: 1 time: 26765151766034 }
>         0000000000028740 <ioctl>: (base address is 0x0000ffffae850000)
>            28750: b13ffc1f      cmn     x0, #4095
>            28754: 54000042      b.hs    0x2875c <ioctl+0x1c>
>             test 4003489/4003489 [0000]     26765.151766034  __GI___ioctl+0x14                        /usr/lib64/libc-2.32.so
>   Event type: branches:uH
>   Sample = { cpu: 0000 addr: 0x0000ffffa67535ac phys_addr: 0x0000000000000000 ip: 0x0000000000000000 pid: 4003489 tid: 4003489 period: 1 time: 26765151766034 }
> 
> Signed-off-by: Ruidong Tian <tianruidong@linux.alibaba.com>
> ---
>  .../scripts/python/arm-cs-trace-disasm.py     | 21 ++++++++++---------
>  1 file changed, 11 insertions(+), 10 deletions(-)
> 
> diff --git a/tools/perf/scripts/python/arm-cs-trace-disasm.py b/tools/perf/scripts/python/arm-cs-trace-disasm.py
> index c9e14af5b58c..b1eb4293cbef 100755
> --- a/tools/perf/scripts/python/arm-cs-trace-disasm.py
> +++ b/tools/perf/scripts/python/arm-cs-trace-disasm.py
> @@ -190,6 +190,17 @@ def process_event(param_dict):
>  	dso_end = get_optional(param_dict, "dso_map_end")
>  	symbol = get_optional(param_dict, "symbol")
>  
> +	cpu = sample["cpu"]
> +	ip = sample["ip"]
> +	addr = sample["addr"]
> +
> +	# Initialize CPU data if it's empty, and directly return back
> +	# if this is the first tracing event for this CPU.
> +	if (cpu_data.get(str(cpu) + 'addr') == None):
> +		cpu_data[str(cpu) + 'addr'] = addr
> +		return
> +
> +
>  	if (options.verbose == True):
>  		print("Event type: %s" % name)
>  		print_sample(sample)
> @@ -211,16 +222,6 @@ def process_event(param_dict):
>  	if (name[0:8] != "branches"):
>  		return
>  
> -	cpu = sample["cpu"]
> -	ip = sample["ip"]
> -	addr = sample["addr"]
> -
> -	# Initialize CPU data if it's empty, and directly return back
> -	# if this is the first tracing event for this CPU.
> -	if (cpu_data.get(str(cpu) + 'addr') == None):
> -		cpu_data[str(cpu) + 'addr'] = addr
> -		return
> -
>  	# The format for packet is:
>  	#
>  	#		  +------------+------------+------------+
> -- 
> 2.33.1
> 
>
James Clark Dec. 20, 2023, 11:15 a.m. UTC | #2 
On 14/12/2023 12:33, Ruidong Tian wrote:
> arm-cs-trace-disasm ignore disam the first branch sample, For example as
> follow, the instructions beteween 0x0000ffffae878750 and
> 0x0000ffffae878754 is lose:
> 
>   ARM CoreSight Trace Data Assembler Dump
>   Event type: branches:uH
>   Sample = { cpu: 0000 addr: 0x0000ffffae878750 phys_addr: 0x0000000000000000 ip: 0x0000000000000000 pid: 4003489 tid: 4003489 period: 1 time: 26765151766034 }
>   Event type: branches:uH
>   Sample = { cpu: 0000 addr: 0x0000000000000000 phys_addr: 0x0000000000000000 ip: 0x0000ffffae878754 pid: 4003489 tid: 4003489 period: 1 time: 26765151766034 }
> 
> Initialize cpu_data earlier to fix it:
> 
>   ARM CoreSight Trace Data Assembler Dump
>   Event type: branches:uH
>   Sample = { cpu: 0000 addr: 0x0000000000000000 phys_addr: 0x0000000000000000 ip: 0x0000ffffae878754 pid: 4003489 tid: 4003489 period: 1 time: 26765151766034 }
>         0000000000028740 <ioctl>: (base address is 0x0000ffffae850000)
>            28750: b13ffc1f      cmn     x0, #4095
>            28754: 54000042      b.hs    0x2875c <ioctl+0x1c>
>             test 4003489/4003489 [0000]     26765.151766034  __GI___ioctl+0x14                        /usr/lib64/libc-2.32.so
>   Event type: branches:uH
>   Sample = { cpu: 0000 addr: 0x0000ffffa67535ac phys_addr: 0x0000000000000000 ip: 0x0000000000000000 pid: 4003489 tid: 4003489 period: 1 time: 26765151766034 }
> 
> Signed-off-by: Ruidong Tian <tianruidong@linux.alibaba.com>

I noticed that this is for the missing second branch sample. Technically
the first one is also still missing, but it doesn't have the origin set,
only the destination, so I'm not sure if we need to do anything with it,
but the first one always looks like this:

  0 [unknown] ([unknown]) =>     ffff8a3b9100 _start+0x0

Followed by this one which you now generate the disassembly for:

  ffff8a3b9104 _start+0x4 (ld-2.31.so) => ffff8a3b9b80 _dl_start+0x0

Either way:

Reviewed-by: James Clark <james.clark@arm.com>

> ---
>  .../scripts/python/arm-cs-trace-disasm.py     | 21 ++++++++++---------
>  1 file changed, 11 insertions(+), 10 deletions(-)
> 
> diff --git a/tools/perf/scripts/python/arm-cs-trace-disasm.py b/tools/perf/scripts/python/arm-cs-trace-disasm.py
> index c9e14af5b58c..b1eb4293cbef 100755
> --- a/tools/perf/scripts/python/arm-cs-trace-disasm.py
> +++ b/tools/perf/scripts/python/arm-cs-trace-disasm.py
> @@ -190,6 +190,17 @@ def process_event(param_dict):
>  	dso_end = get_optional(param_dict, "dso_map_end")
>  	symbol = get_optional(param_dict, "symbol")
>  
> +	cpu = sample["cpu"]
> +	ip = sample["ip"]
> +	addr = sample["addr"]
> +
> +	# Initialize CPU data if it's empty, and directly return back
> +	# if this is the first tracing event for this CPU.
> +	if (cpu_data.get(str(cpu) + 'addr') == None):
> +		cpu_data[str(cpu) + 'addr'] = addr
> +		return
> +
> +
>  	if (options.verbose == True):
>  		print("Event type: %s" % name)
>  		print_sample(sample)
> @@ -211,16 +222,6 @@ def process_event(param_dict):
>  	if (name[0:8] != "branches"):
>  		return
>  
> -	cpu = sample["cpu"]
> -	ip = sample["ip"]
> -	addr = sample["addr"]
> -
> -	# Initialize CPU data if it's empty, and directly return back
> -	# if this is the first tracing event for this CPU.
> -	if (cpu_data.get(str(cpu) + 'addr') == None):
> -		cpu_data[str(cpu) + 'addr'] = addr
> -		return
> -
>  	# The format for packet is:
>  	#
>  	#		  +------------+------------+------------+
diff mbox series

Patch

diff --git a/tools/perf/scripts/python/arm-cs-trace-disasm.py b/tools/perf/scripts/python/arm-cs-trace-disasm.py
index c9e14af5b58c..b1eb4293cbef 100755
--- a/tools/perf/scripts/python/arm-cs-trace-disasm.py
+++ b/tools/perf/scripts/python/arm-cs-trace-disasm.py
@@ -190,6 +190,17 @@  def process_event(param_dict):
 	dso_end = get_optional(param_dict, "dso_map_end")
 	symbol = get_optional(param_dict, "symbol")
 
+	cpu = sample["cpu"]
+	ip = sample["ip"]
+	addr = sample["addr"]
+
+	# Initialize CPU data if it's empty, and directly return back
+	# if this is the first tracing event for this CPU.
+	if (cpu_data.get(str(cpu) + 'addr') == None):
+		cpu_data[str(cpu) + 'addr'] = addr
+		return
+
+
 	if (options.verbose == True):
 		print("Event type: %s" % name)
 		print_sample(sample)
@@ -211,16 +222,6 @@  def process_event(param_dict):
 	if (name[0:8] != "branches"):
 		return
 
-	cpu = sample["cpu"]
-	ip = sample["ip"]
-	addr = sample["addr"]
-
-	# Initialize CPU data if it's empty, and directly return back
-	# if this is the first tracing event for this CPU.
-	if (cpu_data.get(str(cpu) + 'addr') == None):
-		cpu_data[str(cpu) + 'addr'] = addr
-		return
-
 	# The format for packet is:
 	#
 	#		  +------------+------------+------------+