BeagleBone slow inbound net I/O

[Brett Wynkoop]

Greeting-

It is confirmed, the net I/O is much slower than reading from the SD
card.  Here is another run of tar - pipe - tar, but this time the
source is the sd card and the destination is still the USB zfs.

root at beaglebone:/usr/local/bin # zpool iostat 5
               capacity     operations    bandwidth
pool        alloc   free   read  write   read  write
----------  -----  -----  -----  -----  -----  -----
bbexport     295M  14.1G      0      3  27.9K  26.9K
bbexport     297M  14.1G      0     10  25.5K   445K
bbexport     298M  14.1G      0      9  25.4K   346K
bbexport     300M  14.1G      0      9  51.0K   383K
bbexport     302M  14.1G      0     12      0   452K
bbexport     304M  14.1G      0     10  51.1K   452K
bbexport     305M  14.1G      0     10      0   319K
bbexport     306M  14.1G      0      8  51.2K   238K
bbexport     308M  14.1G      0     11  25.7K   415K
bbexport     311M  14.1G      0     14  25.4K   625K
bbexport     315M  14.1G      1     23  66.8K   934K
bbexport     317M  14.1G      0     11  25.5K   472K
bbexport     319M  14.1G      0     14  25.5K   615K
bbexport     321M  14.1G      0      8  39.0K   271K
bbexport     322M  14.1G      0      8  12.7K   340K
bbexport     325M  14.1G      0     11  12.8K   683K
bbexport     327M  14.1G      0      9  12.7K   502K
bbexport     330M  14.1G      0     11  25.4K   594K
bbexport     333M  14.0G      0     12      0   689K
bbexport     337M  14.0G      0     23      0   862K
bbexport     340M  14.0G      0     15  25.5K   796K
bbexport     342M  14.0G      0      8      0   316K
bbexport     342M  14.0G      0      6  12.7K  99.7K
bbexport     343M  14.0G      0     10  12.8K   261K
bbexport     346M  14.0G      0     12  38.2K   534K
bbexport     349M  14.0G      1     14  64.2K   688K
bbexport     349M  14.0G      0      0      0  19.1K
bbexport     351M  14.0G      0     11  12.6K   579K
bbexport     352M  14.0G      0     13  12.7K   784K
bbexport     358M  14.0G      0     15  25.4K   631K
bbexport     360M  14.0G      0     14  12.7K   584K
bbexport     363M  14.0G      0     13      0   634K
bbexport     366M  14.0G      0     13  12.8K   561K
bbexport     369M  14.0G      0     27  12.7K  1.26M
bbexport     375M  14.0G      0     17      0   601K
bbexport     377M  14.0G      0     12      0   551K
bbexport     380M  14.0G      0     11  12.0K   604K
bbexport     387M  14.0G      0     24  25.4K  1.40M
bbexport     390M  14.0G      0     10      0   572K
bbexport     395M  14.0G      0     19      0  1.08M
bbexport     400M  14.0G      0     21      0  1.08M
bbexport     405M  14.0G      0     20      0  1.07M

-Brett


-- 

wynkoop at wynn.com               http://prd4.wynn.com/wynkoop/pgp-keys.txt
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If cowardly and dishonorable men sometimes shoot unarmed men with army 
pistols or guns, the evil must be prevented by the penitentiary and 
gallows, and not by a general deprivation of a constitutional privilege.

-Honorable J. A. Williams, Circuit Judge - 
                  Wilson v. State, 33 Ark. 557, 34 Am. Rep. 52 (1878).