-----Original Message----- From: owner-pth-us...@gnu.org [mailto:owner-pth-us...@gnu.org] On Behalf Of Yang Zhang Sent: Thursday, January 15, 2009 10:28 AM To: pth-users@gnu.org Subject: Re: GNU Pth compatibility
Steve Alstrin wrote: > - OS threads (pthreads) > If your using pth you wont be using native threads. Actually, this is pretty important to me. I'm working on a program containing one or two OS threads handling network IO (each thread managing a set of user threads), along with some number of other OS threads that serve as compute threads which need to communicate with the network threads. Yes, it's possible to use processes and IPC, but the performance suffers as a result. Not for sure what you mean by all this. Are you saying that you will be linking to modules that use the native threads? If you are using the posix compliant portion of pth to use the pthread_* calls, then you will have link problems using both native threads and pth pthreads. > > - valgrind > Not for sure about this one, but tools like Insure++ don't work well > with these, if you need to use a memory checker, recompile with native > for that test. Do you understand why exactly these memory checkers trip up on Pth? I would say its because they are messing around with the instruction pointer, which is what pth is doing also. The way that pth works is anytime an blocking call is used( i.e. any blocking i/o or sleep... Etc.) it switches to the next threads malloced stack space and modifies the instrution pointer to point to the next instruction for that thread. -- Yang Zhang http://www.mit.edu/~y_z/ ______________________________________________________________________ GNU Portable Threads (Pth) http://www.gnu.org/software/pth/ Development Site http://www.ossp.org/pkg/lib/pth/ Distribution Files ftp://ftp.gnu.org/gnu/pth/ Distribution Snapshots ftp://ftp.ossp.org/pkg/lib/pth/ User Support Mailing List pth-users@gnu.org Automated List Manager (Majordomo) pth-users-requ...@gnu.org ______________________________________________________________________ GNU Portable Threads (Pth) http://www.gnu.org/software/pth/ Development Site http://www.ossp.org/pkg/lib/pth/ Distribution Files ftp://ftp.gnu.org/gnu/pth/ Distribution Snapshots ftp://ftp.ossp.org/pkg/lib/pth/ User Support Mailing List pth-users@gnu.org Automated List Manager (Majordomo) pth-users-requ...@gnu.org
