[DYNAREC] Appended instruction name to symbol

[xiangzhai]

Hi,

To find benchmark some workload high branch-misses:

export BOX64_DYNAREC_PERFMAP=1
perf record -e branches -e branch-misses box64 scimark4-x64

To find Symbol 0x000000fff5417170 around:

Samples: 22K of event 'branch-misses:u', Event count (approx.): 225354432
Overhead  Command       Shared Object          Symbol
  29.42%  scimark4-x64  perf-22759.map         [.] 0x000000fff5417174
  29.02%  scimark4-x64  perf-22759.map         [.] 0x000000fff5417170

There might be some opportunity to reduce the branch-misses:

...
0xfff5417160 2 Random_nextDouble:TEST Ed, Gd
0xfff5417168 4 Random_nextDouble:CMOVS Gd, Ed
0xfff5417178 1 Random_nextDouble:TEST Ed, Gd
0xfff541717c 1 Random_nextDouble:MOV Ed, Gd
...

Please review my patch.

Thanks,
Leslie Zhai

[ptitSeb]

Are you sure it's usefull to have this level of detail there? it will make map files much bigger, so it better be usefull!

[xiangzhai]

Are you sure it's usefull to have this level of detail there?

Yup, I am looking for context such as below might lead high branch-misses:

FCMPxxx
BCEQ|NEZ
...

it will make map files much bigger

Yup, but it is able to split the workloads into smaller one, for example, only perf record scimark's MonteCarlo, the map file size is around 31K.

Thanks,
Leslie Zhai

[xiangzhai]

Thanks 🍻