[Samba] Multichannel working at half speed with 2x NICs

[Kanchana Marasinghe]

Hi Micheal,

I've done as you asked, and I got an strace. I ran strace while copying a
1.3GB mkv file from the server to my client. I've included only the first
2000 lines for brevity, but I do see a few pread calls in the log.

http://pastebin.com/raw/FjuppQcT

Hopefully that is what you're looking for.

Thanks,
Kanchana

On Sat, Oct 1, 2016 at 6:04 AM Michael Adam <obnox at samba.org> wrote:

> On 2016-09-28 at 21:59 +0000, Kanchana Marasinghe via samba wrote:
> > Sorry for the delay Jeremy. I ran strace on the lowest pid for smbd (I
> ran
> > "pidof smbd" to get pids, and used the lowest one of the 4 or so that
> came
> > up).
>
> The lowest pid should be the main smbd.
> That's not the one you need to strace:
> you need to find out which smbd process belongs
> to your session (with smbstatus) and strace _that_ pid.
>
> That one should show reads/writes.
>
> Cheers - Michael
>
> > Command was "strace -f -o strace.log `ls /proc/2019/task/ | xargs -n 1
> echo
> > -n " -p`". I then copied a 1.3GB file from the server to my client to
> > generate traffic. The resulting file was around 93k lines (15MB). I've
> > copied the first 2000 lines since it looks like the rest are
> > repeats/similar: http://pastebin.com/raw/2EJsk0An
> >
> > I can provide the full file as well if required.
> >
> > On Wed, Sep 28, 2016 at 1:54 PM Jeremy Allison <jra at samba.org> wrote:
> >
> > > On Wed, Sep 28, 2016 at 07:45:03PM +0000, Kanchana Marasinghe via samba
> > > wrote:
> > > > Hi Jeremy,
> > > >
> > > > Is it safe to assume it's just "strace -p <pid>", for the running
> samba
> > > > daemon?
> > >
> > > http://lichtman.io/strace-an-existing-multi-threaded-process/
> > >
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