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Add Broker::max_threads and Broker::max_sleep tuning options

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The former replaces the pcap vs. live versions of the same tuning
option.  If a user does not change these, Bro makes some internal
decisions that may help avoid performance problems on systems with high
core counts: the number of CAF threads is capped at 8 and the maximum
sleep duration for under-utilized threads is increased to 64ms (CAF's
default is 10ms).
This commit is contained in:
Jon Siwek 2018-06-14 12:51:28 -05:00
parent 197ea03f8f
commit e578c1c231
4 changed files with 46 additions and 24 deletions
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22
scripts/base/frameworks/broker/main.bro
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@ -51,21 +51,15 @@ export {
## all peers.
const ssl_keyfile = "" &redef;
## Max number of threads to use for Broker/CAF functionality when
## operating on a live interface. Using zero will cause this to
## be automatically determined based on number of available CPUs.
const max_live_threads = 0 &redef;
## Max number of threads to use for Broker/CAF functionality.
## Using zero will cause this to be automatically determined
## based on number of available CPUs.
const max_threads = 0 &redef;
## Max number of threads to use for Broker/CAF functionality when
## operating on a pcap file. Using zero will cause this to be
## automaticallu determined based on number of available CPUs.
# TODO: on systems where number of CPUs starts exceeding ~10,
# simply creating a caf::actor_system and not using it incurs
# significant performance overhead. Can CAF be updated to
# be more efficient in the case where the application isn't
# actually making much use of most of those threads instead
# of hardcoding this to the minimal 4 threads?
const max_pcap_threads = 4 &redef;
## Max number of microseconds for under-utilized Broker/CAF
## threads to sleep. Using zero will cause this to be automatically
## determined or just use CAF's default setting.
const max_sleep = 0 &redef;
## Forward all received messages to subscribing peers.
const forward_messages = F &redef;