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Pokud je v /proc/cpuinfo v polozce flags uvedeno ht tak procesor podporuje hyperthreading. Tedy 2 cpu dualcore HT - 2 cpu kazde s dvema jadry a kazde jadro diky ht vystupujici jako dve - celkem tedy 8 polozek.

Z manualu ktery mam od Dellu :

Processor Terminology Socket: a physical package containing a processor with one or more cores. Core: an individual processor within a socket. The new Intel processors can contain two cores per socket. Hyper-Threading Module: an individual software thread that simulates a unique processor for the task scheduler. The new Intel processors allow two threads per core.

Linux-based Operating Systems In general, the Linux kernel can support up to 32 processors on the Intel x86 architecture, and is aware of multiple cores and Hyper-Threading. For example, with a Linux kernel running on a system with two dual-core processors, each with Hyper-Threading, the processors will be presented as follows in /proc/cpuinfo:

CPU ID 0: Socket 1, Core 1, HT Module 1;
CPU ID 1: Socket 1, Core 1, HT Module 2;
CPU ID 2: Socket 1, Core 2, HT Module 1;
CPU ID 3: Socket 1, Core 2, HT Module 2;
CPU ID 4: Socket 2, Core 1, HT Module 1;
CPU ID 5: Socket 2, Core 1, HT Module 2;
CPU ID 6: Socket 2, Core 2, HT Module 1;
CPU ID 7: Socket 2, Core 2, HT Module 2;

This behavior, however, varies across Linux distributions depending upon the support provided in the kernel by the vendor.

Novell/SUSE Linux SUSE Linux Enterprise Server 9 is based on the 2.6.5 kernel, but will support up to 32 processors for both the x86 and x86_64 architectures with Service Pack 2 and above. Licenses are provided per CPU socket.

Red Hat Red Hat® Enterprise Linux 3 x86 provides support for up to 16 processors, and Red Hat Enterprise Linux 4 x86 provides support for up to 32 processors; however, both Red Hat Enterprise Linux 3 and 4 x86_64 only provide support for up to 8 processors. Licensing is provided per CPU socket.