-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 08/30/2014 06:45 PM, Matthias Schiffer wrote: > On 08/30/2014 06:42 PM, Matthias Schiffer wrote: >> Hi, I've noticed that the code produced by Barrier Breaker's >> toolchain sometimes has significantly worse performance that that >> built by Attitude Adjustment. >> >> I can see this extremely with the VPN tool "fastd" developed and >> maintained by me: On the same Barrier Breaker system, a binary >> built by the default Barrier Breaker toolchain (GCC 4.8-linaro) >> gets about 35% less throughput than one built with Attitude >> Adjustment (GCC 4.6-linaro). With the 4.6-linaro toolchain of >> Barrier Breaker, I still get 20% worse performance than with the >> 4.6-linaro of Attitude Adjustment. >> >> Do you have any suggestions what I can do to solve or analyze the >> issue? Any compiler flags I should try fiddling with? Optimizing >> with -Os vs. -O3 doesn't seem to make a difference. >> >> Thanks, Matthias >> > > I forgot to tell that this is on ar71xx.
This could be a problem caused by mips16. We use that in BB to create smaller binaries. but Jonas saw a performance problem in some applications, mostly stuff doing crypto (big integer calculations). Can you try to build the BB toolchain without the mips16 feature in target/linux/ar71xx/Makefile and try your application again. Hauke -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAEBAgAGBQJUAgDuAAoJEIZ0px9YPRMyoaIP/2poElmUMxw/LyDL4I5Il/c3 eYsqGmB13PTYhnRBnHKfokG/1us43Q6bZgMx6AqktEEp+rCGfB4N771ed653YEwU q2SiKIvMU+7z3bPfON9tie6lRA3Ubv/BlSXHS/PKFpJ3H0veywitvqDRhywEfsD6 JCo44Vh5o6p5CTCc3HFJ5FvH/UUiNBEtvSSAbMOBM/z+cO1dJL40yFKf49WLL9BI hTVXaUCbQpBFlISl8202IZJkxNDvpytHMRMPmy1ntweHalOXhmHYEL1BsJszxeZO ntmCIa6lhZnA2JvzZda/drle6Wo9t51QUH/DCf9xL6FgdTyWnEE1QUkJpvkxJlH+ 2iZIpK0FVQ3QFxFQ1eFloSjiiGZUbkhAGknQXLRa/6FfU/QNGSzysgqRrtK8Ekji RdUfQLTKrq6r8vwOGVo2QwB0tAKjoCOm8PTGyctGcIXAZqs5+jb8SdVmHirmR5dm 1IVGIbsI4UvN2lkbgz/Xkz0y0E8en0uo/4/vclv62RzC6PYh0j7GJoI0CUJUDEyI h5ZFbAj54F3v+riEB0YYPKBeS9CF2Gv6PVTGc1szIkc7lvURDk3aMiPc/hwqQ6E7 RFepHBQ0HLf8wzXa6d709P5/xEWVlER4kbWOI4Iij84fyUbLdI6pASnihX0GaP6h RRQ5Z7nUAcns46VMtAzp =e4/e -----END PGP SIGNATURE----- _______________________________________________ openwrt-devel mailing list openwrt-devel@lists.openwrt.org https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-devel
