[erlang-patches] SNMP performance optimization

[Ivan Dubovik]

Hi.

I have a lot of agents:
ets:i().
 id              name              type  size   mem      owner
 ----------------------------------------------------------------------------
...
 snmpm_agent_table snmpm_agent_table set   42932  2287790  snmpm_config


Was:
fprof:analyse().
...
{[{{snmpm_server,agent_data,2},                 513,11826.813,    4.607},
  {undefined,                                     0,    0.446,    0.000}],
 { {snmpm_config,agent_info,2},                 513,11827.259,    4.607},     %
 [{{ets,match_object,2},                        513,11822.196,11524.680},
  {{ets,select_trap,1},                           0,    0.446,    0.373},
  {{snmpm_server,agent_data_item,2},              1,    0.010,    0.008}]}.
...

Now:
{[{{snmpm_server,agent_data,2},                 906,   20.413,    6.341}],
 { {snmpm_server,agent_data_item,2},            906,   20.413,    6.341},     %
 [{{snmpm_config,agent_info,2},                 906,   14.072,    7.743}]}.



git fetch git://github.com/IvanDubovik/otp.git snmp_optimization
https://github.com/IvanDubovik/otp/compare/snmp_optimization
https://github.com/IvanDubovik/otp/compare/snmp_optimization.patch