Re: [issue1116] HAMMER:file read speed

[lhmwzy <lhmwzy@xxxxxxxxx>]

on DF:
dd if=src.tar.gz of=/dev/null
189612+1 records in
189612+1 records out
97081686 bytes transferred in 2.343634 secs (41423571 bytes/sec)

dd if=src.tar.gz of=/dev/null bs=4k
23701+1 records in
23701+1 records out
97081686 bytes transferred in 0.359248 secs (270235901 bytes/sec)

dd if=src.tar.gz of=/dev/null bs=8k
11850+1 records in
11850+1 records out
97081686 bytes transferred in 0.201687 secs (481348025 bytes/sec)

dd if=src.tar.gz of=/dev/null bs=16k
5925+1 records in
5925+1 records out
97081686 bytes transferred in 0.121297 secs (800362656 bytes/sec)

on FB7:

dd if=src.tar.gz of=/dev/null
189612+1 records in
189612+1 records out
97081686 bytes transferred in 0.386370 secs (251266144 bytes/sec)

dd if=src.tar.gz of=/dev/null bs=4k
23701+1 records in
23701+1 records out
97081686 bytes transferred in 0.217616 secs (446114485 bytes/sec)

dd if=src.tar.gz of=/dev/null bs=8k
11850+1 records in
11850+1 records out
97081686 bytes transferred in 0.068447 secs (1418350897 bytes/sec)


dd if=src.tar.gz of=/dev/null bs=16k
5925+1 records in
5925+1 records out
97081686 bytes transferred in 0.067074 secs (1447380483 bytes/sec)


2008/8/12 YONETANI Tomokazu <bugs@lists.dragonflybsd.org>:
>
> YONETANI Tomokazu <qhwt+dfly@les.ath.cx> added the comment:
>
> Do you observe any difference if you run the following command
> on DragonFly machine for each file?
>
> $ dd if=src.tar.gz of=/dev/null
>
> Also try changing the block size(bs=XXX, defaults to 512) to see if there's
> any difference.
> $ dd if=src.tar.gz of=/dev/null bs=4k
>
> Cheers.
>
> _____________________________________________________
> DragonFly issue tracker <bugs@lists.dragonflybsd.org>
> <https://bugs.dragonflybsd.org/issue1116>
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