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Russell Bryant 8dfcd7e418 Improve performance of the code handling the frame queue in chan_iax2. ... In my tests that exercised full frame handling in chan_iax2, the version with these changes took 30% to 40% of the CPU time compared to the same test of Asterisk trunk before these modifications. While doing some profiling for <http://reviewboard.digium.com/r/205/>, one function that caught my eye was network_thread() in chan_iax2.c. After the things that I was working on there, it was the next target for analysis and optimization. I used oprofile's source annotation functionality and found that the loop traversing the frame queue in network_thread() was to blame for the excessive CPU cycle consumption. The frame_queue in chan_iax2 previously held all frames that either were pending transmission or had been transmitted and are still pending acknowledgment. In network_thread(), the previous code would go back through the main for loop after reading a single incoming frame or after being signaled because a frame had been queued up for initial transmission. In each iteration of the loop, it traverses the entire frame queue looking for frames that need to be transmitted. On a busy server, this could easily be quite a few entries. This patch is actually quite simple. The frame_queue has become only a list of frames pending acknowledgment. Frames that need to be transmitted are queued up to a dedicated transmit thread via the taskprocessor API. As a result, the code in network_thread() becomes much simpler, as its only job is to read incoming frames. In addition to the previously described changes, this patch includes some additional changes to the frame_queue. Instead of one big frame_queue, now there is a list per call number to further reduce wasted list traversals. The biggest impact of this change is in socket_process(). For additional details on testing and test results, see the review request. Review: http://reviewboard.digium.com/r/212/ git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@185432 65c4cc65-6c06-0410-ace0-fbb531ad65f3		18 years ago
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h323	Fix build error when chan_h323 is not being built.	18 years ago
misdn	Merged revisions 185120 via svnmerge from	18 years ago
xpmr	…
Makefile	Simplify chan_h323 build to not require a second run of "make".	18 years ago
chan_agent.c	…
chan_alsa.c	…
chan_bridge.c	…
chan_console.c	…
chan_dahdi.c	Improve performance of the ast_event cache functionality.	18 years ago
chan_gtalk.c	Merged revisions 185362 via svnmerge from	18 years ago
chan_h323.c	…
chan_iax2.c	Improve performance of the code handling the frame queue in chan_iax2.	18 years ago
chan_jingle.c	…
chan_local.c	…
chan_mgcp.c	Improve performance of the ast_event cache functionality.	18 years ago
chan_misdn.c	Removed trailing whitespace in chan_misdn files.	18 years ago
chan_nbs.c	…
chan_oss.c	…
chan_phone.c	…
chan_phone.h	…
chan_sip.c	Merged revisions 184947 via svnmerge from	18 years ago
chan_skinny.c	…
chan_unistim.c	Improve performance of the ast_event cache functionality.	18 years ago
chan_usbradio.c	…
chan_vpb.cc	…
console_board.c	…
console_gui.c	…
console_video.c	…
console_video.h	…
iax2-parser.c	…
iax2-parser.h	…
iax2-provision.c	…
iax2-provision.h	…
iax2.h	…
misdn_config.c	Merged revisions 185121 via svnmerge from	18 years ago
vcodecs.c	…
vgrabbers.c	…