diff options
| author | Sean Bright <sean.bright@gmail.com> | 2017-04-17 20:06:10 -0400 |
|---|---|---|
| committer | Sean Bright <sean.bright@gmail.com> | 2017-04-24 11:50:09 -0500 |
| commit | 59203c51cc6a9676ef1ab42aebe070a55f55ead2 (patch) | |
| tree | 474f8136a9a10ee4720c58e4a9d9dc2b6015f03a /include/asterisk/autoconfig.h.in | |
| parent | dc6654d969224129bdd7b4080eda6e027c6454b9 (diff) | |
core: Use eventfd for alert pipes on Linux when possible
The primary win of switching to eventfd when possible is that it only
uses a single file descriptor while pipe() will use two. This means for
each bridge channel we're reducing the number of required file
descriptors by 1, and - if you're using timerfd - we also now have 1
less file descriptor per Asterisk channel.
The API is not ideal (passing int arrays), but this is the cleanest
approach I could come up with to maintain API/ABI.
I've also removed what I believe to be an erroneous code block that
checked the non-blocking flag on the pipe ends for each read. If the
file descriptor is 'losing' its non-blocking mode, it is because of a
bug somewhere else in our code.
In my testing I haven't seen any measurable difference in performance.
Change-Id: Iff0fb1573e7f7a187d5211ddc60aa8f3da3edb1d
Diffstat (limited to 'include/asterisk/autoconfig.h.in')
| -rw-r--r-- | include/asterisk/autoconfig.h.in | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/asterisk/autoconfig.h.in b/include/asterisk/autoconfig.h.in index 5f8a9d37c..b39386b43 100644 --- a/include/asterisk/autoconfig.h.in +++ b/include/asterisk/autoconfig.h.in @@ -225,6 +225,10 @@ /* Define to 1 if you have the `euidaccess' function. */ #undef HAVE_EUIDACCESS +/* Define to 1 if your system supports eventfd and the EFD_NONBLOCK and + EFD_SEMAPHORE flags. */ +#undef HAVE_EVENTFD + /* Define to 1 if you have the `exp' function. */ #undef HAVE_EXP |