Bad bind performance with FreeBSD 7

[Attila Nagy]

On 01/29/08 11:40, Attila Nagy wrote:
> ps: I have an other problem. I've recently switched from a last year 
> 6-STABLE to 7-STABLE and got pretty bad results on the same machine 
> with the same bind (9.4).
> The graphs are here:
> http://picasaweb.google.com/nagy.attila/20080129Fbsd6vs7Bind
The problem still persists and now I can provide some profiling info, 
made by HWPMC.

The samples were collected from totally equal machines, the only 
difference is the OS (FreeBSD 6-STABLE and FreeBSD 7-STABLE, amd64).

Here is FreeBSD/amd64 6-STABLE (compiled yesterday):
granularity: each sample hit covers 4 byte(s) for 0.00% of 158108.00 seconds

  %   cumulative   self              self     total
 time   seconds   seconds    calls  ms/call  ms/call  name
  8.2   12909.00 12909.00        0  100.00%           SHA256_Transform [1]
  4.7   20408.00  7499.00        0  100.00%           kern_select [2]
  3.9   26594.00  6186.00        0  100.00%           swi_net [3]
  3.3   31829.00  5235.00        0  100.00%           sopoll [4]
  3.3   37059.00  5230.00        0  100.00%           syscall [5]
  3.3   42280.00  5221.00        0  100.00%           bcopy [6]
  3.2   47297.00  5017.00        0  100.00%           critical_exit [7]
  3.1   52274.00  4977.00        0  100.00%           Xfast_syscall [8]
  2.8   56748.00  4474.00        0  100.00%           spinlock_exit [9]
  2.8   61176.00  4428.00        0  100.00%           DELAY [10]
  2.5   65101.00  3925.00        0  100.00%           netisr_poll [11]
  2.1   68346.00  3245.00        0  100.00%           bge_rxeof [12]
  1.8   71126.00  2780.00        0  100.00%           copyout [13]
  1.7   73888.00  2762.00        0  100.00%           _mtx_lock_sleep [14]
  1.7   76641.00  2753.00        0  100.00%           soreceive [15]
  1.6   79245.00  2604.00        0  100.00%           rn_match [16]
  1.6   81769.00  2524.00        0  100.00%           selrecord [17]
  1.5   84187.00  2418.00        0  100.00%           netisr_pollmore [18]
  1.5   86526.00  2339.00        0  100.00%           copyin [19]
  1.5   88843.00  2317.00        0  100.00%           uma_zfree_arg [20]
  1.4   91011.00  2168.00        0  100.00%           uma_zalloc_arg [21]
  1.3   93118.00  2107.00        0  100.00%           soo_poll [22]
  1.1   94793.00  1675.00        0  100.00%           bge_poll [23]
  1.0   96428.00  1635.00        0  100.00%           spinlock_enter [24]

And here is FreeBSD/amd64 7-STABLE (also compiled yesterday):
granularity: each sample hit covers 4 byte(s) for 0.00% of 204813.00 seconds

  %   cumulative   self              self     total
 time   seconds   seconds    calls  ms/call  ms/call  name
  9.5   19395.00 19395.00        0  100.00%           _mtx_lock_sleep [1]
  7.1   33844.00 14449.00        0  100.00%           SHA256_Transform [2]
  4.2   42408.00  8564.00        0  100.00%           DELAY [3]
  3.5   49583.00  7175.00        0  100.00%           kern_select [4]
  3.4   56565.00  6982.00        0  100.00%           syscall [5]
  3.2   63104.00  6539.00        0  100.00%           sopoll_generic [6]
  2.9   69125.00  6021.00        0  100.00%           Xfast_syscall [7]
  2.7   74615.00  5490.00        0  100.00%           bcopy [8]
  2.6   79947.00  5332.00        0  100.00%           swi_net [9]
  2.2   84515.00  4568.00        0  100.00%           critical_exit [10]
  1.9   88438.00  3923.00        0  100.00%           netisr_poll [11]
  1.8   92179.00  3741.00        0  100.00%           spinlock_exit [12]
  1.8   95882.00  3703.00        0  100.00%           copyout [13]
  1.7   99343.00  3461.00        0  100.00%           _thread_lock_flags 
[14]
  1.6  102581.00  3238.00        0  100.00%           uma_zfree_arg [15]
  1.4  105358.00  2777.00        0  100.00%           spinlock_enter [16]
  1.2  107897.00  2539.00        0  100.00%           rn_match [17]
  1.2  110369.00  2472.00        0  100.00%           soreceive_generic [18]
  1.2  112814.00  2445.00        0  100.00%           
intr_event_schedule_thread [19]
  1.2  115194.00  2380.00        0  100.00%           uma_zalloc_arg [20]
  1.1  117417.00  2223.00        0  100.00%           netisr_pollmore [21]
  1.0  119444.00  2027.00        0  100.00%           selrecord [22]
  1.0  121450.00  2006.00        0  100.00%           copyin [23]
  1.0  123397.00  1947.00        0  100.00%           cpu_switch [24]

Here are the full output:
http://people.fsn.hu/~bra/freebsd/bind94-performance-fbsd6vs7-20080403/

At first glimpse it seems that there is a lot more time spent in 
_mtx_lock_sleep in FreeBSD 7 than in FreeBSD 6...

-- 
Attila Nagy                                   e-mail: Attila.Nagy at fsn.hu
Free Software Network (FSN.HU)                 phone: +3630 306 6758
http://www.fsn.hu/