Here are my results monitoring the CPU usage for different
configurations:

The counterpart for testing (PC) was connected to the WLAN router via
Ethernet cable (100MB) all the time. Achieved net data rates for
transfering a 10MB test file was roughly 450..500kByte/sec in average
for all configs. 

Here are the top contributors:

SBox connected via LAN and SMB -> 20% (smbd)
Sbox connected via LAN and scp -> 33% (dropbear)

SBox connected via WiFi link and SMB -> 35% (20% smbd + 15%
wlan_main_servi)
Sbox connected via WiFi link and scp -> 65% (dropbear + 
wlan_main_servi + 8% sirq_tasklet )

The astonishing load contributors during transfer in all cases:
15% caused by jive, jive_alsa and IRQ-7 !
(these processes consume below 1% in idle state)

It looks like jive interupts in some way and slows down the file
transfer. First I thought of on-demand scanning issues of the activated
built-in server when storing to the USB-HDD. But scp transfers into /tmp
cause similar CPU load activities of jive. Shutting down the built-in
server doesn't make a difference, too. 
I've got no clue what's going on.

Anyway, CPU load seems to be just part of the game and not the limiting
bottleneck: Total CPU load for SMB via LAN was < 35%, which means the SB
Touch CPU might support 3X the current transfer rate (->
1.5MBtype/sec).

Toby


-- 
streumix
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