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IDProjectCategoryView StatusLast Update
0000281ardourbugspublic2004-12-24 21:42
Reporterdbergst Assigned Topaul  
PrioritynormalSeveritycrashReproducibilitysometimes
Status closedResolutionfixed 
Summary0000281: MIDI memory pool error under Linux kernel 2.4.x
DescriptionThis is an issue I have been encountering when running latencies (with or without automation) at or below 3 ms latency (i.e., p=256, n=2 @ 48KHz sampling rate) when running a 2.4 kernel. In this case, the ardour log window displays a bizarre error message saying something about a MIDI memory pool error and to please compile with larger size. When I run a 2.6 kernel, this error does not seem to occur. FYI, this is on a gentoo linux installation, tested with the following kernel versions and settings:

ck-sources-2.4.23-r1 wirh lowlatency and preempt enabled
gentoo-dev-sources-2.6.3-r1 with elevator=as and preempt enabled
Additional Information
My system is an Abit BX6-R2 with a Pentuum III 450 (Katmai), 768 MB RAM, Hammerfall DSP 9652, using reiserfs as the filestore for my audio files, and jack-audio-connection-kit-0.94.0 compiled /dev/shm on tmpfs. Most sessions I am running 8 tracks or less, and more typically just 5 - 7 tracks.

Please note that I have optimized my IRQs and hdparm settings based on the FAQs I read for linux audio, and to reduce the possibility PCI bus contention I am running an AGP card with an open source XFree86 driver that does not increase the latency of the AGP card.
TagsNo tags attached.

Activities

paul

2004-08-03 22:38

administrator   ~0001367

not seen or reported by anyone in months, and changes were made to the pool system that would have fixed this.

Issue History

Date Modified Username Field Change
2004-02-26 03:40 dbergst New Issue
2004-08-03 22:38 paul Status new => resolved
2004-08-03 22:38 paul Resolution open => fixed
2004-08-03 22:38 paul Assigned To => paul
2004-08-03 22:38 paul Note Added: 0001367
2004-12-24 21:42 dbergst Status resolved => closed