samba performance difference between old and the latest ?

[Namjae Jeon]

2019-09-07 9:37 GMT+09:00, Andrew Bartlett <abartlet at samba.org>:
> On Fri, 2019-09-06 at 16:05 -0700, Jeremy Allison via samba-technical
> wrote:
>> On Sat, Sep 07, 2019 at 07:57:24AM +0900, Namjae Jeon wrote:
>> > 2019-09-07 1:18 GMT+09:00, Jeremy Allison via samba-technical
>> > <samba-technical at lists.samba.org>:
>> > > On Fri, Sep 06, 2019 at 11:01:51AM +0900, Namjae Jeon via samba-
>> > > technical
>> > > wrote:
>> > > > Hello,
>> > > >
>> > > > I found something strange during measuring performance with
>> > > > samba these
>> > > > days.
>
>> > > > dd test result is same with iozone result.
>> > > >
>> > > > samba 4.7.6 : 11.6MB/s
>> > > > samba 4.10.6 : 9.5MB/s
>> > > >
>> > > > with samba 4.7.6 :
>> > > > root at test1234-Samsung-DeskTop-System:/mnt/read# dd if=/dev/zero
>> > > > of=1.txt
>> > > > bs=4096
>> > > > count=1024
>> > > > 1024+0 records in
>> > > > 1024+0 records out
>> > > > 4194304 bytes (4.2 MB, 4.0 MiB) copied, 0.360991 s, 11.6 MB/s
>> > > >
>> > > > with samba 4.10.6 :
>> > > > root at test1234-Samsung-DeskTop-System:/mnt/read# dd if=/dev/zero
>> > > > of=1.txt
>> > > > bs=4096
>> > > > count=1024
>> > > > 1024+0 records in
>> > > > 1024+0 records out
>> > > > 4194304 bytes (4.2 MB, 4.0 MiB) copied, 0.442567 s, 9.5 MB/s
>> > > >
>> > > > Am I missing something? or real issue ?
>> > >
>> > > Is this on identical kernel versions ?
>> >
>> > Yes, I compared two versions in the same test environment.
>>
>> Just checking :-). In that case doing a cachegrind run
>> on each of the two different versions might show where
>> the issue is.
>
> Perhaps it negotiated different protocol versions or encryption
> settings?
Both are mounted with smb3.11, and no encryption setting.
I checked smb packets using tcpdump...

>
> Andrew Bartlett
>
> --
> Andrew Bartlett                       https://samba.org/~abartlet/
> Authentication Developer, Samba Team  https://samba.org
> Samba Developer, Catalyst IT
> https://catalyst.net.nz/services/samba
>
>
>
>