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Set AUDIO_BLK_MS=4 - unlikely to cause significant overhead on non-m68k. 

Several of us have been setting this in /etc/sysctl.conf for months, to
get better performance from applications that require synced audio, etc.

It's also mentioned as a good value with low overhead on most archs here:
https://mail-index.netbsd.org/tech-kern/2019/12/07/msg025830.html

We could probably go lower, but this is low enough to make most/all
software run well, removing frame drops. It's also low enough to get
emulators/mednafen to stop complaining in the console.
This commit is contained in:
nia 2020-01-24 18:58:46 +00:00
parent e2703ffc13
commit f7be620d82
1 changed files with 5 additions and 2 deletions
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7
sys/arch/amd64/conf/GENERIC
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@ -1,4 +1,4 @@
# $NetBSD: GENERIC,v 1.558 2020/01/20 18:38:19 thorpej Exp $
# $NetBSD: GENERIC,v 1.559 2020/01/24 18:58:46 nia Exp $
#
# GENERIC machine description file
#
@ -22,7 +22,7 @@ include "arch/amd64/conf/std.amd64"
options INCLUDE_CONFIG_FILE # embed config file in kernel binary
#ident "GENERIC-$Revision: 1.558 $"
#ident "GENERIC-$Revision: 1.559 $"
maxusers 64 # estimated number of users
@ -55,6 +55,9 @@ maxusers 64 # estimated number of users
options INSECURE # disable kernel security levels - X needs this
options AUDIO_BLK_MS=4 # make software with low latency needs performant
# no substantial CPU overhead on this platform
options RTC_OFFSET=0 # hardware clock is this many mins. west of GMT
options NTP # NTP phase/frequency locked loop