[Akonadi] [Bug 334218] synchronizations of large folders with filesystem contents hogs a Sandybridge core for minutes stat()ing every file in it

[Martin Steigerwald]

https://bugs.kde.org/show_bug.cgi?id=334218

--- Comment #3 from Martin Steigerwald <Martin at Lichtvoll.de> ---
Created attachment 86406
  --> https://bugs.kde.org/attachment.cgi?id=86406&action=edit
callgrind data of 5 minutes cpu busy maildir resource

About 5 minute callgrind data with akonadi maildir resource being 100% cpu busy
after Akonadi restart. As its still busy I can add another dump later on :)

Done as:

martin at merkaba:~> env | grep AKONADI
AKONADI_VALGRIND=akonadi_maildir_resource
AKONADI_VALGRIND_SKIN=callgrind
AKONADI_VALGRIND_OPTIONS=--instr-atstart=no
--callgrind-out-file=/home/martin/callgrind-vcard.%p

martin at merkaba:~> callgrind_control -i on 
PID 28282: /usr/local/bin/akonadi_agent_launcher akonadi_maildir_resource
akonadi_maildir_resource_0
sending command instrumentation on to pid 28282
  OK.

martin at merkaba:~> date
Fr 2. Mai 14:06:14 CEST 2014

martin at merkaba:~> date
Fr 2. Mai 14:11:14 CEST 2014
martin at merkaba:~> callgrind_control -d
PID 28282: /usr/local/bin/akonadi_agent_launcher akonadi_maildir_resource
akonadi_maildir_resource_0

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