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+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 1996-2009. All Rights Reserved.
+%%
+%% The contents of this file are subject to the Erlang Public License,
+%% Version 1.1, (the "License"); you may not use this file except in
+%% compliance with the License. You should have received a copy of the
+%% Erlang Public License along with this software. If not, it can be
+%% retrieved online at http://www.erlang.org/.
+%%
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and limitations
+%% under the License.
+%%
+%% %CopyrightEnd%
+%%
+-module(os_mon_mib).
+%%%-----------------------------------------------------------------
+%%% Description: This module implements the OS-MON-MIB.
+%%% The tables are implemented as shadow tables with the module
+%%% snmp_shadow_table. Here the update functions are implemented.
+%%%-----------------------------------------------------------------
+
+-include("../../otp_mibs/include/OTP-MIB.hrl").
+
+%% API
+-export([load/1, unload/1]).
+
+%% Deprecated API
+-export([init/1, stop/1]).
+
+-deprecated([{init,1,eventually},
+ {stop,1,eventually}]).
+
+%% SNMP instrumentation
+-export([load_table/1, load_table/3, disk_table/1, disk_table/3,
+ mem_sys_mark/1, mem_proc_mark/1, disk_threshold/1]).
+
+%% SNMP shadow functions
+-export([update_load_table/0, update_disk_table/0]).
+
+%% Exported for internal use via rpc
+-export([get_load/1, get_disks/1]).
+
+%% Shadow tables
+-record(loadTable, {
+ loadErlNodeName,
+ loadSystemTotalMemory,
+ loadSystemUsedMemory,
+ loadLargestErlProcess,
+ loadLargestErlProcessUsedMemory,
+ loadCpuLoad,
+ loadCpuLoad5,
+ loadCpuLoad15,
+ loadOsWordsize,
+ loadSystemTotalMemory64,
+ loadSystemUsedMemory64,
+ loadLargestErlProcessUsedMemory64}).
+
+-record(diskTable,
+ {key, diskDescr, diskKBytes, diskCapacity}).
+
+%% Shadow argument macros
+-define(loadShadowArgs,
+ {loadTable, string, record_info(fields, loadTable), 5000,
+ {os_mon_mib, update_load_table}}).
+
+-define(diskShadowArgs,
+ {diskTable, {integer, integer}, record_info(fields, diskTable), 5000,
+ {os_mon_mib, update_disk_table}}).
+
+%% Misc
+-record(diskAlloc, {diskDescr, diskId}).
+
+%%%=========================================================================
+%%% API
+%%%=========================================================================
+
+%%-------------------------------------------------------------------------
+%% load(Agent) -> ok | {error, Reason}
+%% Agent - pid() | atom()
+%% Reason - term()
+%% Description: Loads the OTP-OS-MON-MIB
+%%-------------------------------------------------------------------------
+load(Agent) ->
+ MibDir = filename:join(code:priv_dir(os_mon), "mibs"),
+ snmpa:load_mibs(Agent, [filename:join(MibDir, "OTP-OS-MON-MIB")]).
+
+%%-------------------------------------------------------------------------
+%% unload(Agent) -> ok | {error, Reason}
+%% Agent - pid() | atom()
+%% Reason - term()
+%% Description: Unloads the OTP-OS-MON-MIB
+%%-------------------------------------------------------------------------
+unload(Agent) ->
+ snmpa:unload_mibs(Agent, ["OTP-OS-MON-MIB"]).
+
+%% To be backwards compatible
+init(Agent) ->
+ load(Agent).
+stop(Agent) ->
+ unload(Agent).
+
+%%%=========================================================================
+%%% SNMP instrumentation
+%%%=========================================================================
+load_table(Op) ->
+ snmp_shadow_table:table_func(Op, ?loadShadowArgs).
+load_table(Op, RowIndex, Cols) ->
+ snmp_shadow_table:table_func(Op, RowIndex, Cols, ?loadShadowArgs).
+
+disk_table(new) ->
+ Tab = diskAlloc,
+ Storage = ram_copies,
+ case lists:member(Tab, mnesia:system_info(tables)) of
+ true ->
+ case mnesia:table_info(Tab, storage_type) of
+ unknown ->
+ {atomic, ok}=mnesia:add_table_copy(Tab, node(), Storage);
+ Storage ->
+ catch delete_all(Tab)
+ end;
+ false ->
+ Nodes = [node()],
+ Props = [{type, set},
+ {attributes, record_info(fields, diskAlloc)},
+ {local_content, true},
+ {Storage, Nodes}],
+ {atomic, ok} = mnesia:create_table(Tab, Props)
+
+ end,
+ Rec = #diskAlloc{diskDescr = next_index, diskId = 1},
+ ok = mnesia:dirty_write(Rec),
+ snmp_shadow_table:table_func(new, ?diskShadowArgs).
+
+disk_table(Op, RowIndex, Cols) ->
+ snmp_shadow_table:table_func(Op, RowIndex, Cols, ?diskShadowArgs).
+
+mem_sys_mark(get) ->
+ {value, memsup:get_sysmem_high_watermark()};
+mem_sys_mark(_) ->
+ ok.
+
+mem_proc_mark(get) ->
+ {value, memsup:get_procmem_high_watermark()};
+mem_proc_mark(_) ->
+ ok.
+
+disk_threshold(get) ->
+ {value, disksup:get_almost_full_threshold()};
+disk_threshold(_) ->
+ ok.
+
+%%%=========================================================================
+%%% SNMP shadow functions
+%%%=========================================================================
+update_load_table() ->
+ delete_all(loadTable),
+ lists:foreach(
+ fun(Node) ->
+ case rpc:call(Node, os_mon_mib, get_load, [Node]) of
+ Load when is_record(Load,loadTable) ->
+ ok = mnesia:dirty_write(Load);
+ _Else ->
+ ok
+ end
+ end, [node() | nodes()]).
+
+
+update_disk_table() ->
+ delete_all(diskTable),
+ node_update_disk_table(
+ otp_mib:erl_node_table(get_next, [], [?erlNodeName,?erlNodeOutBytes])).
+
+%%%========================================================================
+%%% Exported for internal use via rpc
+%%%========================================================================
+get_load(Node) ->
+ {Total, Allocated, PidString, PidAllocated} = case memsup:get_memory_data() of
+ {MemTot, MemAlloc, undefined} -> {MemTot, MemAlloc, "undefined", 0};
+ {MemTot, MemAlloc, {Pid, PidMem}} -> {MemTot, MemAlloc, pid_to_str(Pid), PidMem}
+ end,
+ OsWordsize = case memsup:get_os_wordsize() of
+ WS when is_integer(WS) -> WS;
+ _ -> 0
+ end,
+ #loadTable{
+ loadErlNodeName = atom_to_list(Node),
+ loadSystemTotalMemory = mask_int32(Total),
+ loadSystemUsedMemory = mask_int32(Allocated),
+ loadLargestErlProcess = PidString,
+ loadLargestErlProcessUsedMemory = mask_int32(PidAllocated),
+ loadCpuLoad = get_cpu_load(avg1),
+ loadCpuLoad5 = get_cpu_load(avg5),
+ loadCpuLoad15 = get_cpu_load(avg15),
+ loadOsWordsize = OsWordsize,
+ loadSystemTotalMemory64 = Total,
+ loadSystemUsedMemory64 = Allocated,
+ loadLargestErlProcessUsedMemory64 = PidAllocated
+ }.
+
+mask_int32(Value) -> Value band ((1 bsl 32) - 1).
+
+get_disks(NodeId) ->
+ element(1,
+ lists:mapfoldl(
+ fun({Descr, KByte, Capacity}, DiskId) ->
+ {#diskTable{key = {NodeId, DiskId},
+ diskDescr = Descr,
+ diskKBytes = KByte,
+ diskCapacity = Capacity},
+ DiskId + 1}
+ end, 1, disksup:get_disk_data())).
+
+
+%%%========================================================================
+%%% Internal functions
+%%%========================================================================
+node_update_disk_table([_, endOfTable]) ->
+ ok;
+
+node_update_disk_table([{[?erlNodeName | IndexList], NodeStr}, _]) ->
+ Disks = rpc:call(list_to_atom(NodeStr), os_mon_mib, get_disks,
+ IndexList),
+ lists:foreach(fun(Disk) ->
+ mnesia:dirty_write(Disk)
+ end, Disks),
+ node_update_disk_table(otp_mib:erl_node_table(get_next,
+ IndexList,
+ [?erlNodeName,
+ ?erlNodeOutBytes])).
+
+get_cpu_load(X) when X == avg1; X == avg5; X == avg15 ->
+ case erlang:round(apply(cpu_sup, X, [])/2.56) of
+ Large when Large > 100 ->
+ 100;
+ Load ->
+ Load
+ end.
+
+delete_all(Name) -> delete_all(mnesia:dirty_first(Name), Name).
+delete_all('$end_of_table', _Name) -> done;
+delete_all(Key, Name) ->
+ Next = mnesia:dirty_next(Name, Key),
+ ok = mnesia:dirty_delete({Name, Key}),
+ delete_all(Next, Name).
+
+pid_to_str(Pid) -> lists:flatten(io_lib:format("~w", [Pid])).