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Message-Id: <1161969308.27225.120.camel@mindpipe> Date: Fri, 27 Oct 2006 13:15:08 -0400 From: Lee Revell <rlrevell@...-job.com> To: linux-kernel <linux-kernel@...r.kernel.org> Cc: Andi Kleen <ak@...e.de>, john stultz <johnstul@...ibm.com> Subject: AMD X2 unsynced TSC fix? Someone recently pointed out to me that a Windows "CPU driver update" supplied by AMD fixes the unsynced TSC problem on dual core AMD64 systems. http://www.amd.com/us-en/Processors/TechnicalResources/0,,30_182_871_13118,00.html "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 processor systems, by periodically adjusting the core time-stamp-counters, so that they are synchronized." What are the chances of Linux getting a similar fix? Lee - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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