[Samba] Samba 4 slow write

[Ervin Hegedüs]

Hi folks,


On Fri, Apr 24, 2015 at 08:01:54AM +0800, Jones Syue wrote:
> Hello Ervin,
> 
> > I'll notify to you about the result. (First, I need to upgrade
> > that server.)
> 
> Sure! That will be great help me to understand if this patch
> works on thast compiling case too,
> thank you.

I"ve downloaded the Ubuntu's Samba 4.1.6 deb source, and patch it
with Jones's patch. I've compiled full samba-tree, I've got 22
packages. So, I've re-installed the exists packages, and made a
test - see below. The conclusion is this patch didn't resolved my
problem, the running time is very similar as before.

So, how can I go away to resolve my slow write problem?

Thanks,

Ervin


% time     seconds  usecs/call     calls    errors syscall
------ ----------- ----------- --------- --------- ----------------
 15.80   14.789129           4   4010639           getegid
 15.67   14.661022           4   4010648           geteuid
 10.90   10.205386           5   2204716           fcntl
  8.05    7.536012           5   1671479           setresuid
  7.71    7.219007           4   1671480           setresgid
  7.44    6.963770           6   1129072           read
  6.65    6.225672           5   1335406           setgroups
  5.94    5.561429           9    596124           poll
  5.49    5.135218          15    335956           write
  3.97    3.716957           4   1003729           getgroups
  3.54    3.313368           9    375664    335926 lstat
  3.17    2.969795           4    671912           alarm
  2.80    2.621463           4    671912           rt_sigaction
  0.96    0.898388           5    192815         9 stat
  0.63    0.587774           7     81442      9810 getxattr
  0.42    0.395203          12     31662        24 writev
  0.38    0.359771           6     62982           readv
  0.13    0.124557          10     13011           open
  0.09    0.084440           7     12982           close
  0.09    0.081359           5     17792           fstat
  0.06    0.057796           4     13005           getcwd
  0.04    0.038026           5      7708           newfstatat
  0.02    0.021132          67       317           pread
  0.01    0.008339          18       451           pwrite
  0.01    0.007232          14       505           getdents
  0.00    0.003154          18       178           brk
  0.00    0.000389          97         4           fdatasync
  0.00    0.000322          17        19         9 utimensat
  0.00    0.000250           5        47           getpeername
  0.00    0.000230           5        46         1 flock
  0.00    0.000152         152         1           unlink
  0.00    0.000130          14         9           connect
  0.00    0.000122          31         4           msync
  0.00    0.000101           9        11	   inotify_add_watch
  0.00    0.000093           6        16           ioctl
  0.00    0.000088          10         9           socket
  0.00    0.000080           9         9           sendto
  0.00    0.000079          40         2           utime
  0.00    0.000053          13         4           munmap
  0.00    0.000051          51         1	   restart_syscall
  0.00    0.000049           8         6         5 setxattr
  0.00    0.000040          10         4           mmap
  0.00    0.000031           6         5           chdir
  0.00    0.000030           6         5         5 chmod
  0.00    0.000029          15         2           fsetxattr
  0.00    0.000025           8         3           openat
  0.00    0.000020          10         2	   inotify_rm_watch
  0.00    0.000018          18         1           fchown
  0.00    0.000017           4         4           umask
  0.00    0.000009           5         2           dup2
  0.00    0.000007           7         1           ftruncate
  0.00    0.000005           5         1           statfs
------ ----------- ----------- --------- --------- ----------------
100.00   93.587819              20123805    345789 total




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