forked from OSchip/llvm-project
bdf3e7e5b8
I'm adding two new classes that can be used to measure the duration of long tasks as process and thread level, e.g. decoding, fetching data from lldb-server, etc. In this first patch, I'm using it to measure the time it takes to decode each thread, which is printed out with the `dump info` command. In a later patch I'll start adding process-level tasks and I might move these classes to the upper Trace level, instead of having them in the intel-pt plugin. I might need to do that anyway in the future when we have to measure HTR. For now, I want to keep the impact of this change minimal. With it, I was able to generate the following info of a very big trace: ``` (lldb) thread trace dump info Trace technology: intel-pt thread #1: tid = 616081 Total number of instructions: 9729366 Memory usage: Raw trace size: 1024 KiB Total approximate memory usage (excluding raw trace): 123517.34 KiB Average memory usage per instruction (excluding raw trace): 13.00 bytes Timing: Decoding instructions: 1.62s Errors: Number of TSC decoding errors: 0 ``` As seen above, it took 1.62 seconds to decode 9.7M instructions. This is great news, as we don't need to do any optimization work in this area. Differential Revision: https://reviews.llvm.org/D123357 |
||
|---|---|---|
| .. | ||
| add-dsym/uuid | ||
| apropos | ||
| breakpoint | ||
| command | ||
| disassemble/basic | ||
| expression | ||
| frame | ||
| gui | ||
| help | ||
| log | ||
| memory | ||
| platform | ||
| process | ||
| quit | ||
| register/register | ||
| reproducer/invalid-args | ||
| session | ||
| settings | ||
| source/info | ||
| statistics/basic | ||
| target | ||
| thread | ||
| trace | ||
| version | ||
| watchpoints | ||