ASM:Topology
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chmod +x x2topology.sh | chmod +x x2topology.sh | ||
=== Running x2topology === | === Running x2topology === | ||
| - | + | * ''Remark'': You may add your project directory to the executable PATH, or invoke x2topology with a '''./''' prefix (meaning in the current directory) | |
| + | # Launch the script x2topology.sh which iterates through all the '''enabled''' Cores | ||
| + | ./x2topology.sh | ||
| + | * Using a Core i7, Nehalem architecture, Hyper-threading and 4 Cores enabled, it outputs: | ||
| + | OS APIC Thread Core | ||
| + | 0x1 0 0 0 | ||
| + | 0x2 2 0 1 | ||
| + | 0x4 4 0 2 | ||
| + | 0x8 6 0 3 | ||
| + | 0x10 1 1 0 | ||
| + | 0x20 3 1 1 | ||
| + | 0x40 5 1 2 | ||
| + | 0x80 7 1 3 | ||
| + | * Using a Core i7, Nehalem architecture, '''Hyper-threading disabled''' and 4 Cores enabled, it outputs: | ||
| + | OS APIC Thread Core | ||
| + | 0x1 0 0 0 | ||
| + | 0x2 2 0 1 | ||
| + | 0x4 4 0 2 | ||
| + | 0x8 6 0 3 | ||
| + | 0x10 | ||
| + | 0x20 | ||
| + | 0x40 | ||
| + | 0x80 | ||
| + | * Using a Core i7, Nehalem architecture, '''Hyper-threading disabled''' and '''only 1 Core enabled''' (3 Cores disabled), it outputs: | ||
| + | OS APIC Thread Core | ||
| + | 0x1 0 0 0 | ||
| + | 0x2 | ||
| + | 0x4 | ||
| + | 0x8 | ||
| + | 0x10 | ||
| + | 0x20 | ||
| + | 0x40 | ||
| + | 0x80 | ||
| + | # x2topology, binary and shell script, can be lauched with a verbose option to get details: | ||
| + | ./x2topology -v | ||
| + | ./x2topology.sh -v | ||
Revision as of 10:03, 12 March 2014
Contents |
ACPI Extended Topology
Building the Program
Prerequesites
- The Linux Operating System.
- Any Linux package which provides the taskset command that allows the Processor affinity ; util-linux if running ArchLinux.
- The GNU gcc C compiler.
Getting the Source Files
In the repository, download the following files in a project directory, such as x2topology
- x2topology.c
- x2topology.sh
- Optionally, the binary executable file : x2topology
Build the Program
- Compile the C source file
gcc x2topology.c -o x2topology
- Give the executable permission to the downloaded Bash script
chmod +x x2topology.sh
Running x2topology
- Remark: You may add your project directory to the executable PATH, or invoke x2topology with a ./ prefix (meaning in the current directory)
- Launch the script x2topology.sh which iterates through all the enabled Cores
./x2topology.sh
- Using a Core i7, Nehalem architecture, Hyper-threading and 4 Cores enabled, it outputs:
OS APIC Thread Core 0x1 0 0 0 0x2 2 0 1 0x4 4 0 2 0x8 6 0 3 0x10 1 1 0 0x20 3 1 1 0x40 5 1 2 0x80 7 1 3
- Using a Core i7, Nehalem architecture, Hyper-threading disabled and 4 Cores enabled, it outputs:
OS APIC Thread Core 0x1 0 0 0 0x2 2 0 1 0x4 4 0 2 0x8 6 0 3 0x10 0x20 0x40 0x80
- Using a Core i7, Nehalem architecture, Hyper-threading disabled and only 1 Core enabled (3 Cores disabled), it outputs:
OS APIC Thread Core 0x1 0 0 0 0x2 0x4 0x8 0x10 0x20 0x40 0x80
- x2topology, binary and shell script, can be lauched with a verbose option to get details:
./x2topology -v ./x2topology.sh -v
