On December 16, 2014 3:30:01 AM CST, Sebastian Huber <sebastian.hu...@embedded-brains.de> wrote: > >On 16/12/14 01:50, Joel Sherrill wrote: >> On 12/15/2014 6:22 AM, Sebastian Huber wrote: >>> Hello, >>> >>> we work currently on a BSP for the Freescale QorIQ T2080 and T4240 >>> chips. The T4240 is a 12 core PowerPC supporting 24 virtual cores >(two >>> virtual cores share a FPU and AltiVec unit). These chips use the >e6500 >>> core which supports the 64-bit PowerPC instruction set. We will only >use >>> the 32-bit mode. >>> >> The sharing of the FPU and Altivec is similar to the AMD Bulldozer. >Is >> this something >> that RTEMS has to care about? >> > >No, this is a problem for the application designer.
Same as the Bulldozer. If you want top FP performance, you will have to account for this I expect and distribute threads to minimize impact of the shared resource -- Sent from my Android device with K-9 Mail. Please excuse my brevity. _______________________________________________ devel mailing list devel@rtems.org http://lists.rtems.org/mailman/listinfo/devel
