------- Comment From i...@de.ibm.com 2021-08-11 06:59 EDT------- zlib1g_1.2.11.dfsg-2ubuntu7~ppa2_s390x.deb works fine, thanks!
# time -p env DFLTCC=0 python3 -c 'import gzip; gzip.decompress(gzip.compress(b"\x00" * 500000000, 1))' real 2.59 user 2.23 sys 0.35 # dpkg -i zlib1g_1.2.11.dfsg-2ubuntu7~ppa2_s390x.deb # time -p env DFLTCC=0 python3 -c 'import gzip; gzip.decompress(gzip.compress(b"\x00" * 500000000, 1))' real 1.99 user 1.62 sys 0.36 However, I'm not quite sure why does ++#ifdef S390_CRC32_VX ++ if (getauxval(AT_HWCAP) & HWCAP_S390_VX) ++ return s390_crc32_vx; ++#endif work. For me getauxval() causes a segfault when called from an ifunc, that's why I have to use the s390-specific ifunc's hwcap parameter. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to zlib in Ubuntu. https://bugs.launchpad.net/bugs/1932010 Title: [21.10 FEAT] zlib CRC32 optimization for s390x Status in Ubuntu on IBM z Systems: In Progress Status in zlib package in Ubuntu: In Progress Bug description: Use SIMD instructions to accelerate the zlib CRC32 implementation. Business value: Performance improvement in database area The zlib CRC32 optimization for IBM Z is currently being discussed for inclusion into zlib-ng: https://github.com/zlib-ng/zlib-ng/pull/912 The patch for zlib will be based on that. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-z-systems/+bug/1932010/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
