Jeremy wrote:


On Thu, Jun 17, 2010 at 2:25 AM, Ralf Mardorf <ralf.mard...@alice-dsl.net <mailto:ralf.mard...@alice-dsl.net>> wrote:

    Jeremy wrote:

        Is there a fundamental restriction on doing so, or is my
        problem in software?

        Jeremy


    Hardware ;)!

    We should start a black- and whitelist for hardware used for Linux
    real-time. Unfortunately I could add my two machines to the
    blacklist :(.



Which hardware is "bad"?  The cpu?  The video chip? The motherboard?

Jeremy

Dunno. I could post $ hwinfo > hwinfo.txt for a combination of hardware that will cause MIDI jitter when controlling external MIDI equipment.

My mobo is a M2A-VM HDMI with an onboard graphics 'ATI Radeon X1250-based'. Currently I'm using this mobo with a 'NVIDIA GeForce 7200 GS'. Jitter and jitter free moments did shift a little bit when changing the graphics. I guess it's minimal better when using the integrated graphics, but the NVIDIA, anyway, I prefer the NVIDIA, because I'm now able to do 3D stuff.

My CPU is a

spinymouse-s...@64studio:~$ hwinfo --cpu
01: None 00.0: 10103 CPU [Created at cpu.304]
 Unique ID: rdCR.j8NaKXDZtZ6
 Hardware Class: cpu
 Arch: X86-64
 Vendor: "AuthenticAMD"
 Model: 15.107.2 "AMD Athlon(tm) X2 Dual Core Processor BE-2350"
Features: fpu,vme,de,pse,tsc,msr,pae,mce,cx8,apic,sep,mtrr,pge,mca,cmov,pat,pse36,clflush,mmx,fxsr,sse,sse2,ht,syscall,nx,mmxext,fxsr_opt,rdtscp,lm,3dnowext,3dnow,rep_good,extd_apicid,pni,cx16,lahf_lm,cmp_legacy,svm,extapic,cr8_legacy,3dnowprefetch
 Clock: 1000 MHz
 BogoMips: 2000.04
 Cache: 512 kb
 Units/Processor: 2
 Config Status: cfg=new, avail=yes, need=no, active=unknown

02: None 01.0: 10103 CPU
 [Created at cpu.304]
 Unique ID: wkFv.j8NaKXDZtZ6
 Hardware Class: cpu
 Arch: X86-64
 Vendor: "AuthenticAMD"
 Model: 15.107.2 "AMD Athlon(tm) X2 Dual Core Processor BE-2350"
Features: fpu,vme,de,pse,tsc,msr,pae,mce,cx8,apic,sep,mtrr,pge,mca,cmov,pat,pse36,clflush,mmx,fxsr,sse,sse2,ht,syscall,nx,mmxext,fxsr_opt,rdtscp,lm,3dnowext,3dnow,rep_good,extd_apicid,pni,cx16,lahf_lm,cmp_legacy,svm,extapic,cr8_legacy,3dnowprefetch
 Clock: 1000 MHz
 BogoMips: 2000.04
 Cache: 512 kb
 Units/Processor: 2
 Config Status: cfg=new, avail=yes, need=no, active=unknown
spinymouse-s...@64studio:~$

My other machine currently is dismantled. The mobo is an ASRock K7VT2 and the CPU is an 32-bit 800 MHz AMD Athlon + NVIDIA GeForce Blabla 440.
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