Description of problem:

Startup script of boinc-client (/etc/rc.d/init.d/boinc-client) contains line
        daemon --check $BOINCEXE --user $BOINCUSER +19 "$BOINCEXE $BOINCOPTS --dir $BOINCDIR >>$LOGFILE 2>>$ERRORLOG &" >& /dev/null

which starts boinc-client with priority +19. This priority is OK for those BOINC projects which uses CPU only, however if the project use mostly GPU (like NVidia CUDA) it is in this case not running efficiently. For those projects
slightly higher boinc-client daemon priority (like +10) is better.

In this case for CPU only projects drops project executable priority to +19, so
for those projects nothing changes.

For GPU projects boinc-client does not drop priority. So it stays +10 and the
project executable gets enough time to run efficiently

How reproducible:

Always

Steps to Reproduce:
1. Install NVidia video card which supports CUDA and CUDA libraries (unfortunatelly not provided neither by Fedora nor RPMFusion)
2. Join some BOINC project which supports CUDA for Linux (Like GPUGrid)
  
Actual results:

The BOINC project executable is getting so little time (competing with other CPU only projects), that it is unable to provide enough work for GPU.
Renicing boinc project process to +10 as root increases speed considerably.

Expected results:

Renicing should not be needed.

Additional information:

Process information when boinc-client daemon priority is +10 (no additional
manual renicing):

[root@ap ~]# top -b -U boinc -1
top - 18:19:17 up 30 min,  2 users,  load average: 4.81, 5.04, 4.32
Tasks: 226 total,   7 running, 219 sleeping,   0 stopped,   0 zombie
Cpu(s):  4.1%us,  1.1%sy, 83.5%ni, 10.0%id,  1.1%wa,  0.1%hi,  0.1%si,  0.0%st
Mem:   8194852k total,  2504780k used,  5690072k free,    51748k buffers
Swap:  8385920k total,        0k used,  8385920k free,  1198912k cached

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND                                
 2444 boinc     39  19 86572  80m 1336 R 101.0  1.0  23:18.42 einstein_S5R6_1                       
 2438 boinc     39  19 86572  80m 1336 R 97.1  1.0  23:25.37 einstein_S5R6_1                        
 2478 boinc     39  19  214m 192m 5960 R 66.0  2.4  23:25.57 hadam3p_um_6.14                        
 2392 boinc     39  19 60272  48m 5076 R 62.1  0.6  23:05.36 hadsm3mh_um_6.0                        
 4142 boinc     30  10  127m  74m  22m R 50.5  0.9   7:58.30 acemd_6.70_x86_                        
 2252 boinc     30  10  102m 7492 3788 S  0.0  0.1   0:04.23 boinc_client                           
 2385 boinc     39  19  2988 1632 1236 S  0.0  0.0   0:00.21 hadsm3mh_6.03_i                        
 2386 boinc     39  19  7448 4068 3568 S  0.0  0.0   0:00.69 hadam3p_6.14_i6                        
 2387 boinc     39  19  2988 1632 1236 S  0.0  0.0   0:00.00 hadsm3mh_6.03_i                        
 2388 boinc     39  19  2988 1632 1236 S  0.0  0.0   0:00.04 hadsm3mh_6.03_i