This is the mail archive of the gdb@sources.redhat.com mailing list for the GDB project.

Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Re: Known problems with dcache?



We don't use the straw on some targets now; Linux (need to get back to
that patch and turn it on always!), *BSD.



Right so that 32 byte read is now cheap.




The dcache needs some serious work if you want it to be always on. 
Last time I tested it it caused an actual slowdown.  Basically, it's

too small to be useful.



#define DCACHE_SIZE 64

#define LINE_SIZE_POWER (5)



So it never stores more than 2K.  LinuxThreads _overwhelms_ that, by a

downright boggling amount.



You wouldn't know why it caused a slow down?  Th 32 byte read should now 
be cheaper.



Andrew




















  
Index Nav:
      
        [Date Index] [Subject Index] [Author Index] [Thread Index]
      
  

  
Message Nav:
      [Date Prev] [Date Next]
      [Thread Prev] [Thread Next]