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Diffstat (limited to 'lib/appmon/src/appmon_info.erl')
| -rw-r--r-- | lib/appmon/src/appmon_info.erl | 960 |
1 files changed, 0 insertions, 960 deletions
diff --git a/lib/appmon/src/appmon_info.erl b/lib/appmon/src/appmon_info.erl deleted file mode 100644 index 332140f69d..0000000000 --- a/lib/appmon/src/appmon_info.erl +++ /dev/null @@ -1,960 +0,0 @@ -%% -%% %CopyrightBegin% -%% -%% Copyright Ericsson AB 1996-2010. 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% -%% -%%---------------------------------------------------------------------- -%% -%% Information centre for appmon. Must be present on each node -%% monitored. -%% -%% -%% A worklist is maintained that contain all current work that -%% should be performed at each timeout. Each entry in the -%% worklist describes where the result shall be sent and a list -%% of options relevant for that particular task -%% -%% -%% Maintenance Note: -%% -%% This module is supposed to be updated by any who would like to -%% subscribe for information. The idea is that several tools -%% could use this module for their core information gathering -%% services. -%% -%% The module is based on the notion of tasks. Each task should -%% have a nice public interface function which should handle task -%% administration. Tasks are identified by a "key" consisting of -%% three items, the requesting pid, the name of the task and the -%% task auxillary parameter. The requesting pid is the pid of the -%% callee (in the appmon case it can be the node window for -%% instance), the task name is whatever name the task is given -%% (in the appmon case it can be app, app_ctrl or load). The task -%% name can be seen as the type of the task. The task auxillary -%% parameter is an all purpose parameter that have a different -%% meaning for each type of task so in appmon the Aux for app -%% contains the root pid of the monitored application and in -%% app_ctrl it contains the node name (just to distinguish from -%% the other app_ctrl tasks, if any) while the Aux parameter is -%% not used for the load task at all. -%% -%% Each task also carries a list of options for -%% customisation. The options valid for a task is completely -%% internal to that task type except for the timeout option which -%% is used by do_work to determine the interval at which to -%% perform the task. The timeout option may also have the value -%% at_most_once that indicates that the task should not be done -%% more than once, in appmon the remote port (or process) info -%% (pinfo) task is such a task that is only done once for each -%% call. Note that the only way to change or update options is to -%% call the public interface function for the task, this will -%% merge the old options with the new ones and also force the -%% task to be executed. -%% -%% All tasks are managed by the do_work function. The basic -%% functionality being that the result of the task is compared to -%% the previous result and a delivery is sent to the callee if -%% they differ. Most tasks are then done on a regular basis using -%% the timer module for a delay. -%% -%% There are a limited number of places where the module need to -%% be updated when new services are added, they are all marked -%% with "Maintenance Note", and here is a quick guide: -%% -%% First implement the task. Put the functions in this module -%% among the other task implementations. Currently all task -%% implementations should be put in this file to make it simple -%% to monitor a node, this module should be the only one -%% needed. Then add your implementation to the do_work2 function -%% and finally add a public interface function among the other -%% public interface functions. Voila. -%% -%% -%% -%% Future ideas: -%% -%% Appmon should maybe be enhanced to show all processes on a -%% node. First put all processes in an ets P, then pick those -%% that belong to applications (the normal way), then try to find -%% those processes that are roots in process link trees and pick -%% them. The final step would be to do something with those -%% processes that are left. -%% -%%---------------------------------------------------------------------- --module(appmon_info). --behaviour(gen_server). - -%% Exported functions --export([start_link/3, app/4, pinfo/4, load/4, app_ctrl/4]). - -%% For internal use (RPC call) --export([start_link2/3]). - -%% For debugging --export([status/0]). - -%% gen_server callbacks --export([init/1, handle_call/3, handle_cast/2, handle_info/2, - terminate/2, code_change/3]). - - -%%---------------------------------------------------------------------- -%% The records -%% -%% state is used for keeping track of all tasks. -%% -%% db is the database used in the app task. -%% - --record(state, {starter, opts=[], work=[], clients=[]}). --record(db, {q, p, links, links2}). - - -%%---------------------------------------------------------------------- -%% Macros -%% - --define(MK_KEY(CMD, AUX, FROM, OPTS), {CMD, AUX, FROM}). --define(MK_DOIT(KEY), {do_it, KEY}). --define(ifthen(P,S), if P -> S; true -> ok end). - - -%%---------------------------------------------------------------------- -%% Public interface -%% -%% The Aux parameter is an auxillary parameter that can be used -%% freely by the requesting process, it is included in the work -%% task key. appmon uses it for storing the node name when -%% requesting load and app_ctrl tasks, and appmon_a uses it for -%% storing application name when requesting app task. -%% -%% Maintenance Note: Put new tasks at the end, please. -%% - - -%% Do not use gen_server:start_link because we do not want the -%% appmon_info to die when initiating process dies unless special -%% conditions apply. -%% Uhu, we don't??? Made a fix so that this proces DOES indeed die -%% if it's starter dies. /Gunilla -start_link(Node, Client, Opts) -> - rpc:call(Node, ?MODULE, start_link2, [self(), Client, Opts]). -start_link2(Starter, Client, Opts) -> - Name = {local, ?MODULE}, - Args = {Starter, Opts, Client}, - case gen_server:start(Name, ?MODULE, Args, []) of - {ok, Pid} -> - {ok, Pid}; - {error, {already_started, Pid}} -> - register_client(Pid, Client), - {ok, Pid} - end. - - -%% app_ctrl -%% -%% Monitors which applications exist on a node -%% -app_ctrl(Serv, Aux, OnOff, Opts) -> - gen_server:cast(Serv, {self(), app_ctrl, Aux, OnOff, Opts}). - - -%% load -%% -%% Monitors load on a node -%% -load(Serv, Aux, OnOff, Opts) -> - gen_server:cast(Serv, {self(), load, Aux, OnOff, Opts}). - - -%% app -%% -%% Monitors one application given by name (this ends up in a -%% process tree -%% -app(Serv, AppName, OnOff, Opts) -> - gen_server:cast(Serv, {self(), app, AppName, OnOff, Opts}). - -%% pinfo -%% -%% Process or Port info -%% -pinfo(Serv, Pid, OnOff, Opt) -> - gen_server:cast(Serv, {self(), pinfo, Pid, OnOff, Opt}). - -%% register_client -%% -%% Registers a client (someone subscribing for information) -%% - -register_client(Serv, P) -> - link(Serv), - gen_server:call(Serv, {register_client, P}). - -%% status -%% -%% Status of appmon_info -%% - -status() -> - gen_server:cast(?MODULE, status). - -%%---------------------------------------------------------------------- -%% -%% Gen server administration -%% -%%---------------------------------------------------------------------- - -init({Starter, Opts, Pid}) -> - link(Pid), - process_flag(trap_exit, true), - WorkStore = ets:new(workstore, [set, public]), - {ok, #state{starter=Starter, opts=Opts, work=WorkStore, - clients=[Pid]}}. - -terminate(_Reason, State) -> - ets:delete(State#state.work), - ok. - -code_change(_OldVsn, State, _Extra) -> - {ok, State}. - - -%%---------------------------------------------------------------------- -%% -%% Gen server calls -%% -%%---------------------------------------------------------------------- - -handle_call({register_client, Pid}, _From, State) -> - NewState = case lists:member(Pid, State#state.clients) of - true -> State; - _ -> State#state{clients=[Pid | State#state.clients]} - end, - {reply, ok, NewState}; -handle_call(_Other, _From, State) -> - {reply, ok, State}. - -%%---------------------------------------------------------------------- -%% -%% Gen server casts -%% -%%---------------------------------------------------------------------- - -%% Cmd = app_ctrl | load | app | pinfo -handle_cast({From, Cmd, Aux, OnOff, Opts}, State) -> - NewState = update_worklist(Cmd, Aux, From, OnOff, Opts, State), - {noreply, NewState}; -handle_cast(status, State) -> - print_state(State), - {noreply, State}; -handle_cast(_Other, State) -> - {noreply, State}. - - -%%---------------------------------------------------------------------- -%% -%% Gen server info's -%% -%%---------------------------------------------------------------------- - -handle_info({do_it, Key}, State) -> - ok = do_work(Key, State), - {noreply, State}; - -handle_info({'EXIT', Pid, Reason}, State) -> - case State#state.starter of - Pid -> - {stop, Reason, State}; - _Other -> - Work = State#state.work, - del_work(ets:match(Work, {{'$1','$2',Pid}, '_', '_', '_'}), - Pid, Work), - case lists:delete(Pid, State#state.clients) of - [] -> case get_opt(stay_resident, State#state.opts) of - true -> {noreply, State#state{clients=[]}}; - _ -> {stop, normal, State} - end; - NewClients -> {noreply, State#state{clients=NewClients}} - end - end; -handle_info(_Other, State) -> - {noreply, State}. - - -%%---------------------------------------------------------------------- -%% -%% Doing actual work -%% -%%---------------------------------------------------------------------- - -do_work(Key, State) -> - WorkStore = State#state.work, - {Cmd, Aux, From, _OldRef, Old, Opts} = retrieve(WorkStore, Key), - {ok, Result} = do_work2(Cmd, Aux, From, Old, Opts), - if - Result==Old -> ok; - true -> - From ! {delivery, self(), Cmd, Aux, Result} - end, - case get_opt(timeout, Opts) of - at_most_once -> - del_task(Key, WorkStore); - T when is_integer(T) -> - {ok, Ref} = timer:send_after(T, ?MK_DOIT(Key)), - store(WorkStore, Key, Ref, Result, Opts) - end, - ok. - - -%%---------------------------------------------------------------------- -%% -%% Name: do_work2 -%% -%% Maintenance Note: Add a clause here for each new task. -%% -do_work2(load, _Aux, _From, Old, Opts) -> - calc_load(Old, Opts); -do_work2(app_ctrl, _Aux, _From, _Old, _Opts) -> - calc_app_on_node(); -do_work2(app, Aux, _From, _Old, Opts) -> - calc_app_tree(Aux, Opts); -do_work2(pinfo, Aux, _From, _Old, _Opts) -> - calc_pinfo(pinfo, Aux); -do_work2(Cmd, Aux, _From, _Old, _Opts) -> - {Cmd, Aux}. - - -retrieve(Tab, Key) -> - case ets:lookup(Tab, Key) of - [{{Cmd, Aux, From}, Ref, Old, Opts}] -> - {Cmd, Aux, From, Ref, Old, Opts}; - _Other -> - false - end. - -store(Tab, Key, Ref, Old, Opts) -> - ets:insert(Tab, {Key, Ref, Old, Opts}), - Key. - - -%%---------------------------------------------------------------------- -%% -%% WorkStore handling -%% -%%---------------------------------------------------------------------- - -update_worklist(Cmd, Aux, From, true, Opts, State) -> - add_task(Cmd, Aux, From, Opts, State), - State; -update_worklist(Cmd, Aux, From, _Other, _Opts, State) -> - del_task(Cmd, Aux, From, State#state.work), - State. - -%% First check if a task like this already exists and if so cancel its -%% timer and make really sure that no stray do it command will come -%% later. Then start a new timer for the task and store it i -%% WorkStorage -add_task(Cmd, Aux, From, Opts, State) -> - WorkStore = State#state.work, - Key = ?MK_KEY(Cmd, Aux, From, Opts), - OldOpts = del_task(Key, WorkStore), - store(WorkStore, Key, nil, nil, ins_opts(Opts, OldOpts)), - catch do_work(Key, State), - ok. - -%% Delete a list of tasks belonging to a pid -del_work([[Cmd, Aux] | Ws], Pid, Work) -> - del_task(Cmd, Aux, Pid, Work), - del_work(Ws, Pid, Work); -del_work([], _Pid, _Work) -> ok. - -%% Must return old options or empty list -del_task(Cmd, Aux, From, WorkStore) -> - del_task(?MK_KEY(Cmd, Aux, From, []), WorkStore). -del_task(Key, WorkStore) -> - OldStuff = retrieve(WorkStore, Key), - ets:delete(WorkStore, Key), - case OldStuff of - {_Cmd, _Aux, _From, Ref, _Old, Opts} -> - if - Ref /= nil -> - timer:cancel(Ref), - receive - {do_it, Key} -> - Opts - after 10 -> - Opts - end; - true -> Opts - end; - _ -> - [] - end. - - -%% -%% Maintenance Note: -%% -%% Add new task implementations somewhere here below. -%% - - -%%---------------------------------------------------------------------- -%%********************************************************************** -%% -%% -%% BEGIN OF calc_app_tree -%% -%% App tree is the process tree shown in the application window -%% -%% The top (root) pid is found by calling -%% application_controller:get_master(AppName) and this is done in -%% calc_app_on_node (before the call to calc_app_tree). -%% -%% We are going to add processes to the P ets and we are doing it -%% in a two step process. First all prospect processes are put on -%% the queue Q. Then we examine the front of Q and add this -%% process to P if it's not already in P. Then all children of -%% the process is put on the queue Q and the process is repeated. -%% -%% We also maintain two link ets'es, one for primary links and -%% one for secondary links. These databases are updated at the -%% same time as the queue is updated with children. -%% -%%********************************************************************** -%%---------------------------------------------------------------------- - - -calc_app_tree(Name, Opts) -> - Mode = get_opt(info_type, Opts), - case application_controller:get_master(Name) of - Pid when is_pid(Pid) -> - DB = new_db(Mode, Pid), - GL = groupl(Pid), - R = case catch do_find_proc(Mode, DB, GL, find_avoid()) of - {ok, DB2} -> - {ok, {format(Pid), - format(ets:tab2list(DB2#db.p)), - format(ets:tab2list(DB2#db.links)), - format(ets:tab2list(DB2#db.links2))}}; - {error, Reason} -> - {error, Reason}; - Other -> - {error, Other} - end, - ets:delete(DB#db.p), - ets:delete(DB#db.links), - ets:delete(DB#db.links2), - R; - _ -> - {ok, {[], [], [], []}} - end. - -get_pid(P) when is_pid(P) -> P; -get_pid(P) when is_port(P) -> P; -get_pid(X) when is_tuple(X) -> element(2, X). - - -%---------------------------------------------------------------------- -%%--------------------------------------------------------------------- -%% Handling process trees of processses that are linked to each other - -do_find_proc(Mode, DB, GL, Avoid) -> - case get_next(DB) of - {{value, V}, DB2} -> - do_find_proc2(V, Mode, DB2, GL, Avoid); - {empty, DB2} -> - {ok, DB2} - end. - -do_find_proc2(X, Mode, DB, GL, Avoid) when is_port(X) -> - %% There used to be a broken attempt here to handle ports, - %% but the rest of appmon can't handle ports, so now we - %% explicitly ignore ports. - do_find_proc(Mode, DB, GL, Avoid); -do_find_proc2(X, Mode, DB, GL, Avoid) -> - Xpid = get_pid(X), - DB2 = case is_proc(DB, Xpid) of - false -> - add_proc(DB, Xpid), - C1 = find_children(X, Mode), - add_children(C1, Xpid, DB, GL, Avoid, Mode); - _ -> - DB - end, - do_find_proc(Mode, DB2, GL, Avoid). - - -%% Find children finds the children of a process. The method varies -%% with the selected mode (sup or link) and there are also some -%% processes that must be treated differently, notably the application -%% master. -%% -find_children(X, sup) when is_pid(X) -> - %% This is the first (root) process of a supervision tree and it - %% better be a supervisor, we are smoked otherwise - supervisor:which_children(X); -find_children(X, link) when is_pid(X), node(X) /= node() -> - []; -find_children(X, link) when is_pid(X) -> - case process_info(X, links) of - {links, Links} -> - lists:reverse(Links); % OTP-4082 - _ -> [] - end; -find_children({master, X}, sup) -> - case application_master:get_child(X) of - {Pid, _Name} when is_pid(Pid) -> [Pid]; - Pid when is_pid(Pid) -> [Pid] - end; -find_children({_, _X, worker, _}, sup) -> []; -find_children({_, X, supervisor, _}, sup) -> - lists:filter(fun(Thing) -> - Pid = get_pid(Thing), - if - is_pid(Pid) -> true; - true -> false - end - end, - supervisor:which_children(X)). - - -%% Add links to primary (L1) or secondary (L2) sets and return an -%% updated queue. A link is considered secondary if its endpoint is in -%% the queue of un-visited but known processes. -add_children(CList, Paren, DB, _GL, _Avoid, sup) -> - lists:foldr(fun(C, DB2) -> - case get_pid(C) of - P when is_pid(P) -> - add_prim(C, Paren, DB2); - _ -> DB2 end end, - DB, CList); - -add_children(CList, Paren, DB, GL, Avoid, _Mode) -> - lists:foldr(fun(C, DB2) -> - maybe_add_child(C, Paren, DB2, GL, Avoid) - end, DB, CList). - -%% Check if the child is already in P -maybe_add_child(C, Paren, DB, GL, Avoid) -> - case is_proc(DB, C) of - false -> - maybe_add_child_node(C, Paren, DB, GL, Avoid); - _ -> DB % In P: no action - end. - -%% Check if process on this node -maybe_add_child_node(C, Paren, DB, GL, Avoid) -> - if - node(C) /= node() -> - add_foreign(C, Paren, DB); - true -> - maybe_add_child_avoid(C, Paren, DB, GL, Avoid) - end. - -%% Check if child is on the avoid list -maybe_add_child_avoid(C, Paren, DB, GL, Avoid) -> - case lists:member(C, Avoid) of - true -> DB; - false -> - maybe_add_child_port(C, Paren, DB, GL) - end. - -%% Check if it is a port, then it is added -maybe_add_child_port(C, Paren, DB, GL) -> - if - is_port(C) -> - add_prim(C, Paren, DB); - true -> - maybe_add_child_sasl(C, Paren, DB, GL) - end. - -%% Use SASL stuff if present -maybe_add_child_sasl(C, Paren, DB, GL) -> - case check_sasl_ancestor(Paren, C) of - yes -> % Primary - add_prim(C, Paren, DB); - no -> % Secondary - add_sec(C, Paren, DB); - dont_know -> - maybe_add_child_gl(C, Paren, DB, GL) - end. - -%% Check group leader -maybe_add_child_gl(C, Paren, DB, GL) -> - case cmp_groupl(GL, groupl(C)) of - true -> maybe_add_child_sec(C, Paren, DB); - _ -> DB - end. - -%% Check if the link should be a secondary one. Note that this part is -%% pretty much a guess. -maybe_add_child_sec(C, Paren, DB) -> - case is_in_queue(DB, C) of - true -> % Yes, secondary - add_sec(C, Paren, DB); - _ -> % Primary link - add_prim(C, Paren, DB) - end. - -check_sasl_ancestor(Paren, C) -> - case lists:keysearch('$ancestors', 1, - element(2,process_info(C, dictionary))) of - {value, {_, L}} when is_list(L) -> - H = if - is_atom(hd(L)) -> whereis(hd(L)); - true -> hd(L) - end, - if - H == Paren -> yes; - true -> no - end; - _ -> dont_know - end. - - -%---------------------------------------------------------------------- -%%--------------------------------------------------------------------- -%% Primitives for the database DB of all links, processes and the -%% queue of not visited yet processes. - --define(add_link(C, Paren, L), ets:insert(L, {Paren, C})). - -new_db(Mode, Pid) -> - P = ets:new(processes, [set, public]), - L1 = ets:new(links, [bag, public]), - L2 = ets:new(extralinks, [bag, public]), - Q = if - Mode =:= sup -> queue:in({master, Pid}, queue:new()); - true -> queue:in(Pid, queue:new()) - end, - #db{q=Q, p=P, links=L1, links2=L2}. - -get_next(DB) -> - {X, Q} = queue:out(DB#db.q), - {X, DB#db{q=Q}}. -add_proc(DB, P) -> - ets:insert(DB#db.p, {P}). -add_prim(C, Paren, DB) -> - ?add_link(get_pid(C), Paren, DB#db.links), - DB#db{q=queue:in(C, DB#db.q)}. -add_foreign(C, Paren, DB) -> - ?add_link(C, Paren, DB#db.links2), - DB#db{q=queue:in(C, DB#db.q)}. -add_sec(C, Paren, DB) -> - ?add_link(C, Paren, DB#db.links2), - DB. - -is_proc(#db{p=Tab}, P) -> - ets:member(Tab, P). - -is_in_queue(#db{q=Q}, P) -> - queue:member(P, Q). - -%% Group leader handling. No processes or Links to processes must be -%% added when group leaders differ. Note that catch all is needed -%% because net_sup is undefined when not networked but still present -%% in the kernel_sup child list. Blahh, didn't like that. -groupl(P) -> - case process_info(P, group_leader) of - {group_leader, GL} -> GL; - _Other -> nil - end. - -cmp_groupl(_GL1, nil) -> true; -cmp_groupl(GL1, GL1) -> true; -cmp_groupl(_, _) -> false. - - -%% Do some intelligent guessing as to cut in the tree -find_avoid() -> - lists:foldr(fun(X, Accu) -> - case whereis(X) of - P when is_pid(P) -> - [P|Accu]; - _ -> Accu end end, - [undefined], - [application_controller, init, error_logger, gs, - node_serv, appmon, appmon_a, appmon_info]). - - - -%%---------------------------------------------------------------------- -%% -%% Formats the output strings -%% -%%---------------------------------------------------------------------- -format([{P} | Fs]) -> % Process or port - [{P, format(P)} | format(Fs)]; -format([{P1, P2} | Fs]) -> % Link - [{format(P1), format(P2)} | format(Fs)]; -format([]) -> []; -format(P) when is_pid(P), node(P) /= node() -> - pid_to_list(P) ++ " " ++ atom_to_list(node(P)); -format(P) when is_pid(P) -> - case process_info(P, registered_name) of - {registered_name, Name} -> atom_to_list(Name); - _ -> pid_to_list(P) - end; -format(P) when is_port(P) -> - "port " ++ integer_to_list(element(2, erlang:port_info(P, id))); -format(X) -> - io:format("What: ~p~n", [X]), - "???". - - -%%---------------------------------------------------------------------- -%%********************************************************************** -%% -%% -%% END OF calc_app_tree -%% -%% -%%********************************************************************** -%%---------------------------------------------------------------------- - - - - -%%---------------------------------------------------------------------- -%%********************************************************************** -%% -%% -%% BEGIN OF calc_app_on_node -%% -%% -%%********************************************************************** -%%---------------------------------------------------------------------- - -%% Finds all applications on a node -calc_app_on_node() -> - NewApps = reality_check(application:which_applications()), - {ok, NewApps}. - - -reality_check([E|Es]) -> - N = element(1, E), - case catch application_controller:get_master(N) of - P when is_pid(P) -> [{P, N, E} | reality_check(Es)]; - _ -> reality_check(Es) - end; -reality_check([]) -> []. - - - - -%%---------------------------------------------------------------------- -%%********************************************************************** -%% -%% -%% END OF calc_app_on_node -%% -%% -%%********************************************************************** -%%---------------------------------------------------------------------- - - - -%%---------------------------------------------------------------------- -%%********************************************************************** -%% -%% -%% BEGIN OF calc_load -%% -%% -%%********************************************************************** -%%---------------------------------------------------------------------- - -calc_load(Old, Opts) -> - L = load(Opts), - case get_opt(load_average, Opts) of - true -> - case Old of - {_, L} -> {ok, {L, L}}; - {_, O2} when abs(L-O2) < 3 -> {ok, {O2, L}}; - {_, O2} -> {ok, {O2, trunc((2*L+O2)/3)}}; - _ -> {ok, {0, L}} - end; - _ -> - case Old of - {_, O2} -> {ok, {O2, L}}; - _ -> {ok, {0, L}} - end - end. - - -load(Opts) -> - Q = get_sample(queue), - - case get_opt(load_method, Opts) of - time -> - Td = get_sample(runtime), - Tot = get_sample(tot_time), - - case get_opt(load_scale, Opts) of - linear -> - erlang:min(trunc(load_range()*(Td/Tot+Q/6)), - load_range()); - prog -> - erlang:min(trunc(load_range()*prog(Td/Tot+Q/6)), - load_range()) - end; - queue -> - case get_opt(load_scale, Opts) of - linear -> - erlang:min(trunc(load_range()*Q/6), load_range()); - prog -> - erlang:min(trunc(load_range()*prog(Q/6)), load_range()) - end - end. - - -%% -%% T shall be within 0 and 0.9 for this to work correctly -prog(T) -> - math:sqrt(abs(T)/0.9). - - -get_sample(queue) -> statistics(run_queue); -get_sample(runtime) -> {Rt,Rd} = statistics(runtime), - delta(runtime, Rt, Rd); -get_sample(tot_time) -> {Rt,Rd} = statistics(wall_clock), - delta(tot_time, Rt, Rd). - - -%% Keeps track of differences between calls -%% Needed because somebody else might have called -%% statistics/1. -%% -%% Note that due to wrap-arounds, we use a cheating -%% delta which is correct unless somebody else -%% uses statistics/1 -delta(KeyWord, Val, CheatDelta) -> - RetVal = case get(KeyWord) of - undefined -> - Val; - Other -> - if - Other > Val -> - CheatDelta; - true -> - Val-Other - end - end, - put(KeyWord, Val), - RetVal. - - -load_range() -> 16. - - - -%%---------------------------------------------------------------------- -%%********************************************************************** -%% -%% -%% END OF calc_load -%% -%% -%%********************************************************************** -%%---------------------------------------------------------------------- - - -%%---------------------------------------------------------------------- -%%********************************************************************** -%% -%% -%% BEGIN OF calc_pinfo -%% -%% -%%********************************************************************** -%%---------------------------------------------------------------------- - -calc_pinfo(pinfo, Pid) when is_pid(Pid) -> - Info = process_info(Pid), - {ok, io_lib:format("Node: ~p, Process: ~p~n~p~n~n", - [node(), Pid, Info])}; -calc_pinfo(pinfo, Pid) when is_port(Pid) -> - Info = lists:map(fun(Key) ->erlang:port_info(Pid, Key) end, - [id, name, connected, links, input, output]), - - {ok, io_lib:format("Node: ~p, Port: ~p~n~p~n~n", - [node(), element(2, erlang:port_info(Pid, id)), - Info])}; -calc_pinfo(pinfo, _Pid) -> - {ok, ""}. - - -%%---------------------------------------------------------------------- -%%********************************************************************** -%% -%% -%% END OF calc_pinfo -%% -%% -%%********************************************************************** -%%---------------------------------------------------------------------- - - - -%%---------------------------------------------------------------------- -%% -%% Print the State -%% -%% -record(state, {opts=[], work=[], clients=[]}). -%% -%%---------------------------------------------------------------------- -print_state(State) -> - io:format("Status:~n Opts: ~p~n" - "Clients: ~p~n WorkStore:~n", - [State#state.opts, State#state.clients]), - print_work(ets:tab2list(State#state.work)). - -print_work([W|Ws]) -> - io:format(" ~p~n", [W]), print_work(Ws); -print_work([]) -> ok. - - -%%---------------------------------------------------------------------- -%% -%% Option handling -%% -%%---------------------------------------------------------------------- - -%% The only options ever set by a user is info_type, timeout, -%% load_scale and load_method. -get_opt(Name, Opts) -> - case lists:keysearch(Name, 1, Opts) of - {value, Val} -> element(2, Val); - false -> default(Name) - end. - -%% not all options have default values -default(info_type) -> link; -default(load_average) -> true; -default(load_method) -> time; -default(load_scale) -> prog; -default(stay_resident) -> false; -default(timeout) -> 2000. - -ins_opts([Opt | Opts], Opts2) -> - ins_opts(Opts, ins_opt(Opt, Opts2)); -ins_opts([], Opts2) -> Opts2. - -ins_opt({Opt, Val}, [{Opt, _} | Os]) -> [{Opt, Val} | Os]; -ins_opt(Opt, [Opt2 | Os]) -> [Opt2 | ins_opt(Opt, Os)]; -ins_opt(Opt, []) -> [Opt]. |