[mythtv-users] .20 needing more CPU than .19? (My upgrade story)

Disconnect mythtv at gotontheinter.net
Thu Sep 28 14:23:27 UTC 2006

On Tue, 26 Sep 2006, Adam Hirsch did have cause to say:

> Justin The Cynical (cynical at penguinness.org) wrote:
> > So, those of you who are running .20, are you noticing higher load and 
> > CPU usage, or am I running into another issue and just don't know it?
> The system had 4 consecutive shows to record last night, and while it
> successfully recorded them, I noticed that every show past the first one
> had noticeably more digital artifacts than similar shows recorded under .19
> -- my hypothesis is that commflagging might have caused some contention for
> CPU cycles... but then CPU power's never been an issue before, and with the
> Hauppauge card, I figured I was safe from this.  (I'm recording SD content
> from a DishNetwork satellite box.)

I can confirm a lot more cpu usage over here. Using a pchdtv-3000, in .18 I 
could record (SD or HD) while flagging 2 shows (current and previous) and 
still watch a third.  (All digital, I use the svideo only for the directivo, 
not for mythtv.)

In .20, I have trouble watching SD while SD records and flags. (3 SD jobs.) 
Even with deinterlacing off, its almost unusable. (Some 1080i HD shows end 
up totally unwatchable with deinterlacing, no matter what the method is.)

This is watching a SD stream, no background jobs, no recording, no nothing:
 3987 root      25   0  161m 145m  47m R 98.9 14.4   1142:43 X
19585 mythtv    10  -5  490m 308m  78m S 88.7 30.6 747:38.43 mythfrontend

Drives are 3 3G-SATA 300gb Maxtors (can't recommend them -at all- btw, just 
for the archives.. they die, a lot..) in a raid0. Plenty of disk IO 
bandwidth available (or at least there was..)

32bit kernel/userspace, SMP kernel, dual core cpu:
processor       : 0
vendor_id       : AuthenticAMD
cpu family      : 15
model           : 35
model name      : AMD Athlon(tm) 64 X2 Dual Core Processor 3800+
stepping        : 2
cpu MHz         : 2010.466
cache size      : 512 KB
physical id     : 0
siblings        : 2
core id         : 0
cpu cores       : 2
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 1
wp              : yes
flags           : 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 lm 
3dnowext 3dnow pni lahf_lm cmp_legacy ts fid vid ttp
bogomips        : 4029.81

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