From 1b4a59c405e6bd3532921d5c534e2264bb05b2eb Mon Sep 17 00:00:00 2001 From: Rickard Green Date: Mon, 29 Aug 2016 19:21:53 +0200 Subject: Remove old purge strategy --- erts/preloaded/src/erts_code_purger.erl | 112 +++++++++----------------------- 1 file changed, 32 insertions(+), 80 deletions(-) (limited to 'erts/preloaded/src/erts_code_purger.erl') diff --git a/erts/preloaded/src/erts_code_purger.erl b/erts/preloaded/src/erts_code_purger.erl index ee4fcedd2d..ad51815229 100644 --- a/erts/preloaded/src/erts_code_purger.erl +++ b/erts/preloaded/src/erts_code_purger.erl @@ -140,24 +140,13 @@ do_soft_purge(Mod) -> %% - false, and any processes refer 'Mod', false will %% returned; otherwise, true. %% -%% Requests will be sent to all processes identified by -%% Pids at once, but without allowing GC to be performed. -%% Check process code operations that are aborted due to -%% GC need, will be restarted allowing GC. However, only -%% ?MAX_CPC_GC_PROCS outstanding operation allowing GC at -%% a time will be allowed. This in order not to blow up -%% memory wise. -%% -%% We also only allow ?MAX_CPC_NO_OUTSTANDING_KILLS +%% We only allow ?MAX_CPC_NO_OUTSTANDING_KILLS %% outstanding kills. This both in order to avoid flooding %% our message queue with 'DOWN' messages and limiting the %% amount of memory used to keep references to all %% outstanding kills. %% -%% We maybe should allow more than two outstanding -%% GC requests, but for now we play it safe... --define(MAX_CPC_GC_PROCS, 2). -define(MAX_CPC_NO_OUTSTANDING_KILLS, 10). -record(cpc_static, {hard, module, tag}). @@ -172,84 +161,54 @@ check_proc_code(Pids, Mod, Hard) -> CpcS = #cpc_static{hard = Hard, module = Mod, tag = Tag}, - check_proc_code(CpcS, cpc_init(CpcS, Pids, 0), 0, [], #cpc_kill{}, true). + check_proc_code(CpcS, cpc_init(CpcS, Pids, 0), #cpc_kill{}, true). -check_proc_code(#cpc_static{hard = true}, 0, 0, [], +check_proc_code(#cpc_static{hard = true}, 0, #cpc_kill{outstanding = [], waiting = [], killed = Killed}, true) -> %% No outstanding requests. We did a hard check, so result is whether or %% not we killed any processes... Killed; -check_proc_code(#cpc_static{hard = false}, 0, 0, [], _KillState, Success) -> +check_proc_code(#cpc_static{hard = false}, 0, _KillState, Success) -> %% No outstanding requests and we did a soft check... Success; -check_proc_code(#cpc_static{hard = false, tag = Tag} = CpcS, NoReq0, NoGcReq0, - [], _KillState, false) -> +check_proc_code(#cpc_static{hard = false, tag = Tag} = CpcS, NoReq, _KillState, false) -> %% Failed soft check; just cleanup the remaining replies corresponding %% to the requests we've sent... - {NoReq1, NoGcReq1} = receive - {check_process_code, {Tag, _P, GC}, _Res} -> - case GC of - false -> {NoReq0-1, NoGcReq0}; - true -> {NoReq0, NoGcReq0-1} - end - end, - check_proc_code(CpcS, NoReq1, NoGcReq1, [], _KillState, false); -check_proc_code(#cpc_static{tag = Tag} = CpcS, NoReq0, NoGcReq0, NeedGC0, - KillState0, Success) -> - - %% Check if we should request a GC operation - {NoGcReq1, NeedGC1} = case NoGcReq0 < ?MAX_CPC_GC_PROCS of - GcOpAllowed when GcOpAllowed == false; - NeedGC0 == [] -> - {NoGcReq0, NeedGC0}; - _ -> - {NoGcReq0+1, cpc_request_gc(CpcS,NeedGC0)} - end, + receive {check_process_code, {Tag, _P}, _Res} -> ok end, + check_proc_code(CpcS, NoReq-1, _KillState, false); +check_proc_code(#cpc_static{tag = Tag} = CpcS, NoReq0, KillState0, Success) -> %% Wait for a cpc reply or 'DOWN' message - {NoReq1, NoGcReq2, Pid, Result, KillState1} = cpc_recv(Tag, - NoReq0, - NoGcReq1, - KillState0), + {NoReq1, Pid, Result, KillState1} = cpc_recv(Tag, NoReq0, KillState0), %% Check the result of the reply case Result of - aborted -> - %% Operation aborted due to the need to GC in order to - %% determine if the process is referring the module. - %% Schedule the operation for restart allowing GC... - check_proc_code(CpcS, NoReq1, NoGcReq2, [Pid|NeedGC1], KillState1, - Success); false -> %% Process not referring the module; done with this process... - check_proc_code(CpcS, NoReq1, NoGcReq2, NeedGC1, KillState1, - Success); + check_proc_code(CpcS, NoReq1, KillState1, Success); true -> %% Process referring the module... case CpcS#cpc_static.hard of false -> %% ... and soft check. The whole operation failed so %% no point continuing; clean up and fail... - check_proc_code(CpcS, NoReq1, NoGcReq2, [], KillState1, - false); + check_proc_code(CpcS, NoReq1, KillState1, false); true -> %% ... and hard check; schedule kill of it... - check_proc_code(CpcS, NoReq1, NoGcReq2, NeedGC1, - cpc_sched_kill(Pid, KillState1), Success) + check_proc_code(CpcS, NoReq1, cpc_sched_kill(Pid, KillState1), Success) end; 'DOWN' -> %% Handled 'DOWN' message - check_proc_code(CpcS, NoReq1, NoGcReq2, NeedGC1, - KillState1, Success) + check_proc_code(CpcS, NoReq1, KillState1, Success) end. -cpc_recv(Tag, NoReq, NoGcReq, #cpc_kill{outstanding = []} = KillState) -> +cpc_recv(Tag, NoReq, #cpc_kill{outstanding = []} = KillState) -> receive - {check_process_code, {Tag, Pid, GC}, Res} -> - cpc_handle_cpc(NoReq, NoGcReq, GC, Pid, Res, KillState) + {check_process_code, {Tag, Pid}, Res} -> + cpc_handle_cpc(NoReq, Pid, Res, KillState) end; -cpc_recv(Tag, NoReq, NoGcReq, +cpc_recv(Tag, NoReq, #cpc_kill{outstanding = [R0, R1, R2, R3, R4 | _]} = KillState) -> receive {'DOWN', R, process, _, _} when R == R0; @@ -257,21 +216,21 @@ cpc_recv(Tag, NoReq, NoGcReq, R == R2; R == R3; R == R4 -> - cpc_handle_down(NoReq, NoGcReq, R, KillState); - {check_process_code, {Tag, Pid, GC}, Res} -> - cpc_handle_cpc(NoReq, NoGcReq, GC, Pid, Res, KillState) + cpc_handle_down(NoReq, R, KillState); + {check_process_code, {Tag, Pid}, Res} -> + cpc_handle_cpc(NoReq, Pid, Res, KillState) end; -cpc_recv(Tag, NoReq, NoGcReq, #cpc_kill{outstanding = [R|_]} = KillState) -> +cpc_recv(Tag, NoReq, #cpc_kill{outstanding = [R|_]} = KillState) -> receive {'DOWN', R, process, _, _} -> - cpc_handle_down(NoReq, NoGcReq, R, KillState); - {check_process_code, {Tag, Pid, GC}, Res} -> - cpc_handle_cpc(NoReq, NoGcReq, GC, Pid, Res, KillState) + cpc_handle_down(NoReq, R, KillState); + {check_process_code, {Tag, Pid}, Res} -> + cpc_handle_cpc(NoReq, Pid, Res, KillState) end. -cpc_handle_down(NoReq, NoGcReq, R, #cpc_kill{outstanding = Rs, - no_outstanding = N} = KillState) -> - {NoReq, NoGcReq, undefined, 'DOWN', +cpc_handle_down(NoReq, R, #cpc_kill{outstanding = Rs, + no_outstanding = N} = KillState) -> + {NoReq, undefined, 'DOWN', cpc_sched_kill_waiting(KillState#cpc_kill{outstanding = cpc_list_rm(R, Rs), no_outstanding = N-1})}. @@ -280,10 +239,8 @@ cpc_list_rm(R, [R|Rs]) -> cpc_list_rm(R0, [R1|Rs]) -> [R1|cpc_list_rm(R0, Rs)]. -cpc_handle_cpc(NoReq, NoGcReq, false, Pid, Res, KillState) -> - {NoReq-1, NoGcReq, Pid, Res, KillState}; -cpc_handle_cpc(NoReq, NoGcReq, true, Pid, Res, KillState) -> - {NoReq, NoGcReq-1, Pid, Res, KillState}. +cpc_handle_cpc(NoReq, Pid, Res, KillState) -> + {NoReq-1, Pid, Res, KillState}. cpc_sched_kill_waiting(#cpc_kill{waiting = []} = KillState) -> KillState; @@ -308,18 +265,13 @@ cpc_sched_kill(Pid, no_outstanding = N+1, killed = true}. -cpc_request(#cpc_static{tag = Tag, module = Mod}, Pid, AllowGc) -> - erts_internal:check_process_code(Pid, Mod, [{async, {Tag, Pid, AllowGc}}, - {allow_gc, AllowGc}]). - -cpc_request_gc(CpcS, [Pid|Pids]) -> - cpc_request(CpcS, Pid, true), - Pids. +cpc_request(#cpc_static{tag = Tag, module = Mod}, Pid) -> + erts_internal:check_process_code(Pid, Mod, [{async, {Tag, Pid}}]). cpc_init(_CpcS, [], NoReqs) -> NoReqs; cpc_init(CpcS, [Pid|Pids], NoReqs) -> - cpc_request(CpcS, Pid, false), + cpc_request(CpcS, Pid), cpc_init(CpcS, Pids, NoReqs+1). % end of check_proc_code() implementation. -- cgit v1.2.3