[mythtv-commits] Re: Ticket #551: blocking in ThreadedFileWriter
MythTV
mythtv at cvs.mythtv.org
Sat Nov 12 15:15:12 EST 2005
#551: blocking in ThreadedFileWriter
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Reporter: anonymous | Owner: danielk
Type: defect | Status: assigned
Priority: critical | Milestone: 0.19
Component: mythtv | Version: head
Severity: medium | Resolution:
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Comment (by anonymous):
I've been playing with numbers for hours.. Basically I can't get anything
to work. I've put buffers up to 128MB/s and it still eventually fills
them and IOBOUNDs on writing.
One thing I notice though, is the CPU load his 100% and if the buffer is
32-64MB, it's at 100% usage for 10-20 seconds before I start to get IO
blocking. .. I'm wondering if something else is going on and the blocking
on writing is a result, not a cause. Maybe if I can find what's maxing
the CPU and that's fixed, all these problems will go away.
Is there a specific way myth should be profiled? I'll gladly profile it I
can get the instructions on how for Myth. I think if we can find what's
killing the CPU, we can find out what's causing these problems.
One side note, with the buffer set high I do start seeing "taking a long
time to flush" which is coming from the TFW.
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Ticket URL: <http://cvs.mythtv.org/trac/ticket/551>
MythTV <http://www.mythtv.org/>
MythTV
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