This is the mail archive of the libc-alpha@sources.redhat.com mailing list for the glibc 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: [Dri-devel] Re: OpenGL and the LinuxThreads pthread_descr structure

On Mon, May 20, 2002 at 12:02:31AM -0700, Ulrich Drepper wrote:
| On Thu, 2002-05-16 at 20:08, Gareth Hughes wrote:
| > I disagree that __thread is the best you can ever get.  In the best 
| > case, you have an extra load and subtraction before you have the address 
| > of a thread-local variable.  In the worst case, you have a function call 
| > in there as well.
| 
| If you define your variable correctly using __thread can be as efficient
| as anything else.

Hi, Ulrich.  Could you elaborate a bit on how to correctly use __thread
so that the extra instructions Gareth mentioned aren't needed?

Allen
Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]