Der AMD Dual-Core Optimizer für AMD Athlon 64 X2 und AMD Turion 64 X2 Prozessoren, der die Time Stamp Counter (TSC) MSRs bei AMDs Dual-Core Prozessoren synchronisiert, ist in der Version 1.1.4 erschienen.
Heise online hat das Problem von Threads, die sich per Timestamp-Counter synchronisieren und dabei aus dem Takt geraten, unter dem Titel "Zeitmissmanagement" erklärt.
Die Beschreibung von AMD:
"The AMD Dual-Core Optimizer can help improve some PC gaming video performance by compensating for those applications that bypass the Windows API for timing by directly using the RDTSC (Read Time Stamp Counter) instruction. Applications that rely on RDTSC do not benefit from the logic in the operating system to properly account for the affect of power management mechanisms on the rate at which a processor core's Time Stamp Counter (TSC) is incremented. The AMD Dual-Core Optimizer helps to correct the resulting video performance effects or other incorrect timing effects that these applications may experience on dual-core or multiple processor systems."
Aus den Release Notes:
Version 1.1.4 * Fixed installation issue on Windows Vista.
Version 1.1.3 * Updated AMD Dual-Core Optimizer for compatibility with AMD Family 10h and AMD Family 11h processors.
Version 1.1.2 * AMD Dual-Core Optimizer installation no longer requires system reboot. (Clean installs only, upgrades from 1.1.1 still requires reboot.)
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