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Programmazione => Generale => Topic aperto da: bonmario - Marzo 05, 2015, 01:25:42 pm

Titolo: Memoria piena
Inserito da: bonmario - Marzo 05, 2015, 01:25:42 pm
Ciao a tutti,
ho appena finito di sviluppare un'applicazione multit hread che, tramite un threadpool fatto da me, va a lanciare un thread per ogni fle trovato in una determinata directory.
mentre la sviluppavo, non ho mai avuto problemi, adesso l'ho lanciata in una directory che contiene circa 500 file e, quando arriva a circa 400, mi da un errore perché non riesce a creare un nuovo thread, perché la memoria è esaurita.
Ho provato a lanciarla con aperto il task Manager di windows ed ho visto che:
- il n° di thread aperti è costante, quindi probabilmente la gestione della chiusura dei vari thread è ok
- l'occupazione del file di paging cresce col passare del n° di fiels processati e torna normale solo quando chiudo l'applicativo.

A causa di ciò che ho scritto, chredo che il problema dipenda dal fatto che da qualche parte nel progetto non sto liberando la memoria usata da qualche componente. E' corretta come diagnosi?
Se fosse corretta, c'è qualche meccanismo da poter sfruttare per capire dove posso aver fattoq uesta dimenticanza?

Grazie in anticipo, Mario
Titolo: Re:Memoria piena
Inserito da: nomorelogic - Marzo 05, 2015, 03:13:34 pm
quando voglio controllare la memoria uso heaptrc
http://www.freepascal.org/docs-html/rtl/heaptrc/usage.html (http://www.freepascal.org/docs-html/rtl/heaptrc/usage.html)

Per usarla basta inserirla in uses sul progetto come prima unit.
Lancia poi la tua applicazione da shell, quando terminerà se ci sono problemi di memoria ti verranno visualizzati.

Titolo: Re:Memoria piena
Inserito da: bonmario - Marzo 05, 2015, 04:29:57 pm
Perfetto, grazie !!!!
Nel frattempo, ho fatto un po' di test isolando i vari pezzi del programma e sono arrivato alla conclusione che il problema è nel modulo che uso per leggere i files XML.
Ho aperto un bug in mantis: http://mantis.freepascal.org/view.php?id=27607

Comunque sono curioso, voglio provare heaptrc, perché non l'avevo mai visto !!!!

Grazie, Mario
Titolo: Re:Memoria piena
Inserito da: El Salvador - Marzo 07, 2015, 11:50:21 am
Citazione
Per usarla basta inserirla in uses sul progetto come prima unit.
O ancora meglio Opzioni progetto->opzioni compilatore->debugging
Titolo: Re:Memoria piena
Inserito da: bonmario - Novembre 28, 2018, 08:31:31 am
Ciao,
scusate se riapro un vecchio thread ...
Questo è l'esito che ottengo con un progetto che sto sistemando:
Codice: [Seleziona]
S:\PagheJ\Sviluppo\Predefinito\Utilities\CercaInOoo_Pdf\CercaInOoo_Pdf.exe 
Heap dump by heaptrc unit
30748145 memory blocks allocated : 3881535123/3925851176
30748085 memory blocks freed     : 3881514957/3925830904
60 unfreed memory blocks : 20166
True heap size : 851968
True free heap : 825296
Should be : 827856
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Il fatto che non mi dia nessun nome di sorgente significa che i sorgenti che non liberano la memoria sono di FPC o Lazarus, oppure sbaglio?

Grazie in anticipo, Mario
Titolo: Re:Memoria piena
Inserito da: guest1752 - Novembre 28, 2018, 12:41:38 pm
Citazione
quando voglio controllare la memoria uso heaptrc
http://www.freepascal.org/docs-html/rtl/heaptrc/usage.html

Per usarla basta inserirla in uses sul progetto come prima unit.
Lancia poi la tua applicazione da shell, quando terminerà se ci sono problemi di memoria ti verranno visualizzati.

grande dritta  ;D
Titolo: Re:Memoria piena
Inserito da: nomorelogic - Novembre 29, 2018, 07:22:38 pm
Citazione da: bonmario - Novembre 28, 2018, 08:31:31 am
Il fatto che non mi dia nessun nome di sorgente significa che i sorgenti che non liberano la memoria sono di FPC o Lazarus, oppure sbaglio?

non so ma probabilmente il problema è nel tuo sorgente
guarda bene quando istanzi delle classi a runtime, probabilmente manca l'invocazione di qualche Free
Titolo: Re:Memoria piena
Inserito da: bonmario - Novembre 29, 2018, 07:50:16 pm
Citazione da: nomorelogic - Novembre 29, 2018, 07:22:38 pm

non so ma probabilmente il problema è nel tuo sorgente

Effettivamente era lì ... mi sono accorto oggi che quello che ho postato qui era la traccia ottenuta dal programma senza le info di debug ...

Ciao, Mario