Re: ARM GCC 8.x Performance Dropping Compared to Linaro GCC 7.x

2019-08-20 Thread Yupeng Chang
Hi Maxim, Attached is the testcase. Please follow these steps to test: 1. download GCC 8.3 from: https://developer.arm.com/-/media/Files/downloads/gnu-a/8.3-2019.03/binrel/gcc-arm-8.3-2019.03-x86_64-aarch64-linux-gnu.tar.xz?revision=2e88a73f-d233-4f96-b1f4-d8b36e9bb0b9&la=en 2. download GCC 7.4 fr

Re: ARM GCC 8.x Performance Dropping Compared to Linaro GCC 7.x

2019-08-20 Thread Yupeng Chang
Hi Maxim, Thank you for your reply! I'll summarize a testcase for you! Yupeng Chang Aug 21 2019 On Tue, Aug 20, 2019 at 9:15 PM Maxim Kuvyrkov wrote: > Hi Yupeng, > > There are many changes from Linaro GCC 7.x to ARM GCC 8.x, so it is > difficult to guess what may be going wrong. > > Do you hav

Re: ARM GCC 8.x Performance Dropping Compared to Linaro GCC 7.x

2019-08-20 Thread Maxim Kuvyrkov
Hi Yupeng, There are many changes from Linaro GCC 7.x to ARM GCC 8.x, so it is difficult to guess what may be going wrong. Do you have a testcase that you can share? With a testcase we can investigate the problem and, possibly, fix it. Regards, -- Maxim Kuvyrkov www.linaro.org > On Aug 19