Hi, I am working on a project about reducing page faults of multi-threaded programs. I am using latest Fedora core (Linux 2.6) and pthread library. In this project, each user-level thread (created by pthread_create() function) needs to pass a value to the task structure in the kernel which corresponds to the thread. The first step is getting a unique id of the task structure of each thread. But what is this unique id?
I tried to use getpid() to get the process id of each thread and use it as unique id. But this didnt work out since all threads in a process share the same pid. I tried to use the thread_id returned by pthread_create() function but this id is meaningless to the kernel. Could anyone help me out on this? Thanks!
On 07/09/2007 06:29 PM, Feng Xian wrote:
Hi, I am working on a project about reducing page faults of multi-threaded programs. I am using latest Fedora core (Linux 2.6) and pthread library. In this project, each user-level thread (created by pthread_create() function) needs to pass a value to the task structure in the kernel which corresponds to the thread. The first step is getting a unique id of the task structure of each thread. But what is this unique id?
I tried to use getpid() to get the process id of each thread and use it as unique id. But this didnt work out since all threads in a process share the same pid. I tried to use the thread_id returned by pthread_create() function but this id is meaningless to the kernel. Could anyone help me out on this?
Use gettid() ??
Thanks. gettid() works.
On 7/9/07, Chuck Ebbert < cebbert@redhat.com> wrote:
On 07/09/2007 06:29 PM, Feng Xian wrote:
Hi, I am working on a project about reducing page faults of
multi-threaded
programs. I am using latest Fedora core (Linux 2.6) and pthread library.
In
this project, each user-level thread (created by pthread_create() function) needs to pass a value to the task structure in the kernel which
corresponds
to the thread. The first step is getting a unique id of the task
structure
of each thread. But what is this unique id?
I tried to use getpid() to get the process id of each thread and use it
as
unique id. But this didnt work out since all threads in a process share
the
same pid. I tried to use the thread_id returned by pthread_create() function but this id is meaningless to the kernel. Could anyone help me out on
this?
Use gettid() ??
kernel@lists.fedoraproject.org
-
Chuck Ebbert -
Feng Xian