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How could I get my program's functions when using perf and converting the data in JSON?
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matburnx
Posts: 2
Hello,
I'd like to use the tool perf to know how much time was needed to execute each method of a program I've made in Smalltalk (Pharo), however I'd also like to get the data in JSON through the perf data convert --to-json
command after having done perf record ...
.
For now, it only gives the system calls whereas if I do the perf report > file.txt
I get the Smalltalk's methods but the data is not really parsable.
Does anyone have any idea of how I could fix that?
0
Answers
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The version of my kernel is 6.8.0
From the txt file I get something like this :12.42% 0.00% pharo libPharoVMCore.so [.] runOnMainThread (inlined) | ---runOnMainThread (inlined) runVMThread (inlined) | |--8.50%--loadPharoImage | readImageNamed | allocateMemoryForImagewithHeader.isra.0 | initializeObjectMemory | | | --0.51%--lastPointerOfWhileSwizzling | --3.93%--interpret enterSmalltalkExecutiveImplementation interpret | --3.24%--primitiveAllInstances allInstancesOf
And the JSON file gives me something like this (they do not represent the same sample but come from the same perf.data file) :
{ "timestamp": 19015602195292, "pid": 19473, "tid": 19473, "comm": "pharo", "callchain": [ { "ip": "0xffffffff92611bfa", "symbol": "handle_mm_fault", "dso": "[kernel.kallsyms]" }, { "ip": "0xffffffff922cb588", "symbol": "do_user_addr_fault", "dso": "[kernel.kallsyms]" }, { "ip": "0xffffffff933e2693", "symbol": "exc_page_fault", "dso": "[kernel.kallsyms]" }, { "ip": "0xffffffff93400ba7", "symbol": "asm_exc_page_fault", "dso": "[kernel.kallsyms]" } ] },
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