https://community.intel.com/t5/Intel-Moderncode-for-Parallel/NPTL-in-Linux-kernel2-6-on-Hyperthreading-Processor/m-p/984640#M5816 The introduction of NPTL into Redhat 9.0 kernel 2.6 has solve the Java threading problems on scalability and signal handling. <BR /><BR />Correct me if I am wrong on this perception:<BR />For example, an application consist of 5 Java threads, map to 5 kernel threads created from the NPTL (clone system call) using 1 to 1 mapping model respectively. <BR /><BR />If my perception is correct:<BR /><BR />1)How can these 5 kernel threads being scheduled into the HT dual processors which consist of 4 logical processors?<BR /><BR />2) How the kernel threads scheduler knows the number of logical processors exist?<BR /><BR />3) How is the naming of the logical processors in a DP with HT enabled?Is it:<BR /><BR />Physical processor 0: Logical processor 0<BR />Physical processor 0: Logical processor 1<BR />Physical processor 1: Logical processor 2<BR />Physical processor 1: Logical processor 3<BR /><BR />OR:<BR /><BR />Physical processor 0: Logical processor 0<BR />Physical processor 1: Logical processor 1<BR />Physical processor 0: Logical processor 2<BR />Physical processor 1: Logical processor 3<BR /> Correct me if I am wrong. Does this dependent on the kernel version installed?<BR /><BR />Thank you: meileng<BR /> Wed, 24 Sep 2003 16:12:35 GMT yaumeileng 2003-09-24T16:12:35Z https://community.intel.com/t5/Intel-Moderncode-for-Parallel/NPTL-in-Linux-kernel2-6-on-Hyperthreading-Processor/m-p/984640#M5816 The introduction of NPTL into Redhat 9.0 kernel 2.6 has solve the Java threading problems on scalability and signal handling. <BR /><BR />Correct me if I am wrong on this perception:<BR />For example, an application consist of 5 Java threads, map to 5 kernel threads created from the NPTL (clone system call) using 1 to 1 mapping model respectively. <BR /><BR />If my perception is correct:<BR /><BR />1)How can these 5 kernel threads being scheduled into the HT dual processors which consist of 4 logical processors?<BR /><BR />2) How the kernel threads scheduler knows the number of logical processors exist?<BR /><BR />3) How is the naming of the logical processors in a DP with HT enabled?Is it:<BR /><BR />Physical processor 0: Logical processor 0<BR />Physical processor 0: Logical processor 1<BR />Physical processor 1: Logical processor 2<BR />Physical processor 1: Logical processor 3<BR /><BR />OR:<BR /><BR />Physical processor 0: Logical processor 0<BR />Physical processor 1: Logical processor 1<BR />Physical processor 0: Logical processor 2<BR />Physical processor 1: Logical processor 3<BR /> Correct me if I am wrong. Does this dependent on the kernel version installed?<BR /><BR />Thank you: meileng<BR /> Wed, 24 Sep 2003 16:12:35 GMT https://community.intel.com/t5/Intel-Moderncode-for-Parallel/NPTL-in-Linux-kernel2-6-on-Hyperthreading-Processor/m-p/984640#M5816 yaumeileng 2003-09-24T16:12:35Z