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| author | Björn-Egil Dahlberg <[email protected]> | 2015-04-17 11:51:36 +0200 |
|---|---|---|
| committer | Björn-Egil Dahlberg <[email protected]> | 2015-04-23 14:37:17 +0200 |
| commit | 7d06388110e52357f6ec3742b2fcc11d4ac3aadc (patch) | |
| tree | 4646354ee09f77060e84e20f81e4ffbbbb8fcc9d /lib/kernel | |
| parent | 6ba93050fa369626b22cc608c7f874148bb0e5c1 (diff) | |
| download | otp-7d06388110e52357f6ec3742b2fcc11d4ac3aadc.tar.gz otp-7d06388110e52357f6ec3742b2fcc11d4ac3aadc.tar.bz2 otp-7d06388110e52357f6ec3742b2fcc11d4ac3aadc.zip | |
kernel: Add instruction_count helper to erts_debug
Diffstat (limited to 'lib/kernel')
| -rw-r--r-- | lib/kernel/src/erts_debug.erl | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/lib/kernel/src/erts_debug.erl b/lib/kernel/src/erts_debug.erl index 17bee06b5e..8f81fcf825 100644 --- a/lib/kernel/src/erts_debug.erl +++ b/lib/kernel/src/erts_debug.erl @@ -20,7 +20,7 @@ %% Low-level debugging support. EXPERIMENTAL! --export([size/1,df/1,df/2,df/3]). +-export([size/1,df/1,df/2,df/3,ic/1]). %% This module contains the following *experimental* BIFs: %% disassemble/1 @@ -114,6 +114,19 @@ get_internal_state(_) -> instructions() -> erlang:nif_error(undef). +-spec ic(F) -> Result when + F :: function(), + Result :: term(). + +ic(F) when is_function(F) -> + Is0 = erlang:system_info(instruction_counts), + R = F(), + Is1 = erlang:system_info(instruction_counts), + Is = lists:keysort(2,[{I,C1 - C0}||{{I,C1},{I,C0}} <- lists:zip(Is1,Is0)]), + _ = [io:format("~12w ~w~n", [C,I])||{I,C}<-Is], + io:format("Total: ~w~n",[lists:sum([C||{_I,C}<-Is])]), + R. + -spec lock_counters(info) -> term(); (clear) -> ok; ({copy_save, boolean()}) -> boolean(); |