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add more info about performance issues

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Hartmut Seichter 2024-06-04 21:35:12 +02:00
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docs/README.md
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@ -24,27 +24,27 @@ Here some ideas for improving this tiny engine:
## Build / Dev Support ## Build / Dev Support
- [ ] add a test rig either with Snitch or Catch2 - [ ] add a test rig either with Snitch or Catch2
- [ ] write some reasonable testcases - [ ] write some reasonable testcases
- [ ] add CPU and GPU benchmarks to address various issues
# Issues # Issues
```sh ```sh
Performance counter stats for 'bin/paradiso_pong': Performance counter stats for 'bin/paradiso_pong':
555,35 msec task-clock:u # 0,042 CPUs utilized 555,35 msec task-clock:u # 0,042 CPUs utilized
0 context-switches:u # 0,000 /sec 0 context-switches:u # 0,000 /sec
0 cpu-migrations:u # 0,000 /sec 0 cpu-migrations:u # 0,000 /sec
4.072 page-faults:u # 7,332 K/sec 4.072 page-faults:u # 7,332 K/sec
319.484.735 cycles:u # 0,575 GHz 319.484.735 cycles:u # 0,575 GHz
358.165.995 instructions:u # 1,12 insn per cycle 358.165.995 instructions:u # 1,12 insn per cycle
86.037.942 branches:u # 154,926 M/sec 86.037.942 branches:u # 154,926 M/sec
2.469.068 branch-misses:u # 2,87% of all branches 2.469.068 branch-misses:u # 2,87% of all branches
13,092775373 seconds time elapsed 13,092775373 seconds time elapsed
0,311565000 seconds user 0,311565000 seconds user
0,247491000 seconds sys 0,247491000 seconds sys
``` ```
above run with `perf stat bin/paradiso_pong` shows some really bad performance issues. above run with `perf stat bin/paradiso_pong` shows some really bad performance issues.