Hi Andy, On Sunday 22 February 2009 03:01:33 Andy Green wrote: > Somebody in the thread at some point said: > | Hi, > | > | On Sun, Feb 22, 2009 at 07:48:08AM +0800, Andy Green wrote: > |> But does it seem to reduce SD throughput significantly? It introduces > |> some delay before it drags back the data from Glamo, but on the other > |> hand there is a new scatter-gather combining config option used recently > |> to increase the size of these multiblock transfers more often, reducing > |> that hit. > |> > |> If we're lucky it doesn't really impact throughput typically, what's > |> your opinion from running it? > | > | It doesn't seem to reduce sd throughput significantly here, at least > | compared to the impact of a powered gps unit.
So far I can tell this patch made quite a difference to me. I tested it with
basic "gst-launch playbin" and now I can listen to the music even when I rsync
the phone. No more choppy sound (previously it was choppy from time to time
even without anything else touching SD card)
top:
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
4098 root 20 0 38812 7232 4076 S 33.7 6.0 0:44.38 gst-launch-0.10
4145 root 20 0 19420 1800 808 R 26.4 1.5 0:13.91 rsync
4146 root 20 0 23112 2144 648 S 12.3 1.8 0:10.56 rsync
448 root 15 -5 0 0 0 D 5.0 0.0 0:48.53 mmcqd
4114 root 20 0 2480 1088 856 R 4.7 0.9 0:04.60 top
iotop:
Total DISK READ: 127.12 K/s | Total DISK WRITE: 4.65 K/s
PID USER DISK READ DISK WRITE SWAPIN IO> COMMAND
524 root 0 B/s 4.65 K/s 0.00 % 0.00 % [kjournald]
4195 root 102.32 K/s 0 B/s 0.00 % 0.00 % rsync --server -
vulogDtprze.iLs --timeout=1200 --partial . //
4158 root 24.80 K/s 0 B/s 0.00 % 0.00 % gst-launch-0.10 playbin
uri=file:///root/nb.mp3
1920 root 0 B/s 0 B/s 0.00 % 0.00 % wpa_supplicant -u
1 root 0 B/s 0 B/s 0.00 % 0.00 % init [3]
Thanks,
Rob
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