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* benchtests: Add difficult strstr needle for bruteforce algorithmsWilco Dijkstra2024-04-241-0/+27
| | | | | | | Add another difficult needle to strstr that clearly shows the quadratic complexity of bruteforce algorithms. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* Update copyright dates with scripts/update-copyrightsPaul Eggert2024-01-011-1/+1
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* Update copyright dates with scripts/update-copyrightsJoseph Myers2023-01-061-1/+1
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* benchtests: Improve benchtests for strstr, memmem, and memchrNoah Goldstein2022-05-271-36/+149
| | | | | | | | | 1. Use json_ctx for output to help standardize format across all benchtests. 2. Add some additional tests to strstr and memchr expanding alignments and adding more small values. Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
* Update copyright dates with scripts/update-copyrightsPaul Eggert2022-01-011-1/+1
| | | | | | | | | | | | | | | | | | | | | | | I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 7061 files FOO. I then removed trailing white space from math/tgmath.h, support/tst-support-open-dev-null-range.c, and sysdeps/x86_64/multiarch/strlen-vec.S, to work around the following obscure pre-commit check failure diagnostics from Savannah. I don't know why I run into these diagnostics whereas others evidently do not. remote: *** 912-#endif remote: *** 913: remote: *** 914- remote: *** error: lines with trailing whitespace found ... remote: *** error: sysdeps/unix/sysv/linux/statx_cp.c: trailing lines
* Update copyright dates with scripts/update-copyrightsPaul Eggert2021-01-021-1/+1
| | | | | | | | | | | | | | | | I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 6694 files FOO. I then removed trailing white space from benchtests/bench-pthread-locks.c and iconvdata/tst-iconv-big5-hkscs-to-2ucs4.c, to work around this diagnostic from Savannah: remote: *** pre-commit check failed ... remote: *** error: lines with trailing whitespace found remote: error: hook declined to update refs/heads/master
* Update copyright dates with scripts/update-copyrights.Joseph Myers2020-01-011-1/+1
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* Prefer https to http for gnu.org and fsf.org URLsPaul Eggert2019-09-071-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Also, change sources.redhat.com to sourceware.org. This patch was automatically generated by running the following shell script, which uses GNU sed, and which avoids modifying files imported from upstream: sed -ri ' s,(http|ftp)(://(.*\.)?(gnu|fsf|sourceware)\.org($|[^.]|\.[^a-z])),https\2,g s,(http|ftp)(://(.*\.)?)sources\.redhat\.com($|[^.]|\.[^a-z]),https\2sourceware.org\4,g ' \ $(find $(git ls-files) -prune -type f \ ! -name '*.po' \ ! -name 'ChangeLog*' \ ! -path COPYING ! -path COPYING.LIB \ ! -path manual/fdl-1.3.texi ! -path manual/lgpl-2.1.texi \ ! -path manual/texinfo.tex ! -path scripts/config.guess \ ! -path scripts/config.sub ! -path scripts/install-sh \ ! -path scripts/mkinstalldirs ! -path scripts/move-if-change \ ! -path INSTALL ! -path locale/programs/charmap-kw.h \ ! -path po/libc.pot ! -path sysdeps/gnu/errlist.c \ ! '(' -name configure \ -execdir test -f configure.ac -o -f configure.in ';' ')' \ ! '(' -name preconfigure \ -execdir test -f preconfigure.ac ';' ')' \ -print) and then by running 'make dist-prepare' to regenerate files built from the altered files, and then executing the following to cleanup: chmod a+x sysdeps/unix/sysv/linux/riscv/configure # Omit irrelevant whitespace and comment-only changes, # perhaps from a slightly-different Autoconf version. git checkout -f \ sysdeps/csky/configure \ sysdeps/hppa/configure \ sysdeps/riscv/configure \ sysdeps/unix/sysv/linux/csky/configure # Omit changes that caused a pre-commit check to fail like this: # remote: *** error: sysdeps/powerpc/powerpc64/ppc-mcount.S: trailing lines git checkout -f \ sysdeps/powerpc/powerpc64/ppc-mcount.S \ sysdeps/unix/sysv/linux/s390/s390-64/syscall.S # Omit change that caused a pre-commit check to fail like this: # remote: *** error: sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S: last line does not end in newline git checkout -f sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S
* Further improve string bench timingWilco Dijkstra2019-06-281-1/+1
| | | | | | | | | | | | | | | | | | | | | | | Further improve the timings of the string benchmarks. Ensure most take between 1 and 4 seconds to improve accuracy. Overall time taken increases by 35%. Tested on AArch64. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org> * benchtests/bench-math-inlines.c: Increase iterations. * benchtests/bench-memcmp.c: Likewise. * benchtests/bench-rawmemchr.c: Likewise. * benchtests/bench-strcmp.c: Likewise. * benchtests/bench-strcpy_chk.c: Likewise. * benchtests/bench-string.h (INNER_LOOP_ITERS8): Add define. (INNER_LOOP_ITERS_MEDIUM): Increase iterations. (INNER_LOOP_ITERS_SMALL): Likewise. * benchtests/bench-strncat.c: Increase iterations. * benchtests/bench-strncmp.c: Increase iterations. * benchtests/bench-strncpy.c: Reduce iterations for wide strings. * benchtests/bench-strrchr.c: Increase iterations. * benchtests/bench-strstr.c: Keep iterations unchanged. * benchtests/bench-strtod.c: Increase iterations.
* Fix gcc 9 build errors for make xcheck. [BZ #24556]Stefan Liebler2019-06-191-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch fixes the following gcc 9 warnings for "make xcheck" / "make bench": -string/tst-strcasestr.c: ../include/bits/../../misc/bits/error.h:42:5: error: ‘%s’ directive argument is null [-Werror=format-overflow=] -argp/argp-test.c: argp-test.c:130:20: error: ‘%d’ directive writing between 1 and 11 bytes into a region of size 10 [-Werror=format-overflow=] argp-test.c:130:19: note: directive argument in the range [-2147483648, 122] argp-test.c:130:5: note: ‘sprintf’ output between 2 and 12 bytes into a destination of size 10 -nss/tst-field.c: tst-field.c:52:7: error: ‘%s’ directive argument is null [-Werror=format-overflow=] -benchtests/bench-strstr.c: ../include/bits/../../misc/bits/error.h:42:5: error: ‘%s’ directive argument is null [-Werror=format-overflow=] -benchtests/bench-malloc-simple.c: bench-malloc-simple.c:93:16: error: iteration 3 invokes undefined behavior [-Werror=aggressive-loop-optimizations] ChangeLog: [BZ #24556] * string/test-strcasestr.c (check_result): Add NULL check. * nss/tst-field.c (check_rewrite): Likewise. * benchtests/bench-strstr.c (do_one_test): Likewise. * string/test-strstr.c (check_result): Likewise. * argp/argp-test.c (popt): Increase size of buf to 12. * benchtests/bench-malloc-simple.c (bench): Do not initialize tests array out of bounds.
* Benchmark strstr hard needlesWilco Dijkstra2019-06-111-0/+79
| | | | | | | | | | | | | | | Benchmark needles which exhibit worst-case performance. This shows that basic_strstr is quadratic and thus unsuitable for large needles. On the other hand the Two-way and new strstr implementations are linear with increasing needle sizes. The slowest cases of the two implementations are within a factor of 2 on several different microarchitectures. Two-way is slowest on inputs which cause a branch mispredict on almost every character. The new strstr is slowest on inputs which almost match and result in many calls to memcmp. Thanks to Szabolcs for providing various hard needles. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org> * benchtests/bench-strstr.c (test_hard_needle): New function.
* Improve string benchtest timingWilco Dijkstra2019-05-211-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | Improve string benchtest timing. Many tests run for 0.01s which is way too short to give accurate results. Other tests take over 40 seconds which is way too long. Significantly increase the iterations of the short running tests. Reduce number of alignment variations in the long running memcpy walk tests so they take less than 5 seconds. As a result most tests take at least 0.1s and all finish within 5 seconds. * benchtests/bench-memcpy-random.c (do_one_test): Use medium iterations. * benchtests/bench-memcpy-walk.c (test_main): Reduce alignment tests. * benchtests/bench-memmem.c (do_one_test): Use small iterations. * benchtests/bench-memmove-walk.c (test_main): Reduce alignment tests. * benchtests/bench-memset-walk.c (test_main): Reduce alignment tests. * benchtests/bench-strcasestr.c (do_one_test): Use small iterations. * benchtests/bench-string.h (INNER_LOOP_ITERS): Increase iterations. (INNER_LOOP_ITERS_MEDIUM): New define. (INNER_LOOP_ITERS_SMALL): New define. * benchtests/bench-strpbrk.c (do_one_test): Use medium iterations. * benchtests/bench-strsep.c (do_one_test): Use small iterations. * benchtests/bench-strspn.c (do_one_test): Use medium iterations. * benchtests/bench-strstr.c (do_one_test): Use small iterations. * benchtests/bench-strtok.c (do_one_test): Use small iterations.
* Improve bench-strstrWilco Dijkstra2019-04-091-83/+137
| | | | | | | | | | | | | | | | | | | | | Improve bench-strstr by using an extract from the manual as the input to make the test more realistic. Use the same input for both found and fail cases rather than using a memset of '0' for most of the string, which measures performance of strchr rather than strstr. Add result checking to catch potential errors. Remove the repeated tests at slightly different alignments and add more large needle and haystack testcases. Replace stupid_strstr with an efficient basic implementation. Add the Two-way implementation to simplify comparisons with much faster generic implementations. * benchtests/bench-strstr.c (input): Add realistic input text. (stupid_strstr): Remove function. (basic_strstr): Add function. (twoway_strstr): Add function. (do_one_test): Add result checking. (do_test): Use new input text. Remove accidental early matches. (test_main): Improve range of tests, reduce unaligned cases.
* Update copyright dates with scripts/update-copyrights.Joseph Myers2019-01-011-1/+1
| | | | | | | * All files with FSF copyright notices: Update copyright dates using scripts/update-copyrights. * locale/programs/charmap-kw.h: Regenerated. * locale/programs/locfile-kw.h: Likewise.
* Improve strstr performanceWilco Dijkstra2018-07-161-0/+1
| | | | | | | | | | | | | | | | | | Improve strstr performance. Strstr tends to be slow because it uses many calls to memchr and a slow byte loop to scan for the next match. Performance is significantly improved by using strnlen on larger blocks and using strchr to search for the next matching character. strcasestr can also use strnlen to scan ahead, and memmem can use memchr to check for the next match. On the GLIBC bench tests the performance gains on Cortex-A72 are: strstr: +25% strcasestr: +4.3% memmem: +18% On a 256KB dataset strstr performance improves by 67%, strcasestr by 47%. Reviewd-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* Use correct includes in benchtestsWilco Dijkstra2018-03-151-0/+1
| | | | | | | | | | | | | Currently the benchtests are run with internal GLIBC headers, which is incorrect. Defining _ISOMAC in the makefile ensures the internal headers are bypassed. Fix all tests which were relying on internal defines or includes. * benchtests/Makefile: Define _ISOMAC. * benchtests/bench-strcoll.c: Add missing sys/stat.h include. * benchtests/bench-string.h: Define inhibit_loop_to_libcall macro. * benchtests/bench-strstr.c: Define empty libc_hidden_builtin_def. * benchtests/bench-strtok.c (oldstrtok): Use rawmemchr. * benchtests/bench-timing.h: Define attribute_hidden.
* Update copyright dates with scripts/update-copyrights.Joseph Myers2018-01-011-1/+1
| | | | | | | * All files with FSF copyright notices: Update copyright dates using scripts/update-copyrights. * locale/programs/charmap-kw.h: Regenerated. * locale/programs/locfile-kw.h: Likewise.
* Update copyright dates with scripts/update-copyrights.Joseph Myers2017-01-011-1/+1
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* Adjust benchtests to new support library.Adhemerval Zanella2016-12-191-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch basically replaces the test-skeleton.c inclusion by support/test-driver.c and also minor adjustments in bench-string.h. Checked on x86_64-linux-gnu and powerpc64le-linux-gnu. * benchtests/bench-string.h (TEST_FUNCTION): Use name without parenthesis. (CMDLINE_PROCESS): Define using function instead of macro. * benchtests/bench-memccpy.c: Include <support/test-driver.c> instead of test-skeleton. * benchtests/bench-memchr.c: Likewise. * benchtests/bench-memcmp.c: Likewise. * benchtests/bench-memcpy-large.c: Likewise. * benchtests/bench-memcpy.c: Likewise. * benchtests/bench-memmem.c: Likewise. * benchtests/bench-memmove-large.c: Likewise. * benchtests/bench-memmove.c: Likewise. * benchtests/bench-memset-large.c: Likewise. * benchtests/bench-memset.c: Likewise. * benchtests/bench-rawmemchr.c: Likewise. * benchtests/bench-strcasecmp.c: Likewise. * benchtests/bench-strcasestr.c: Likewise. * benchtests/bench-strcat.c: Likewise. * benchtests/bench-strchr.c: Likewise. * benchtests/bench-strcmp.c: Likewise. * benchtests/bench-strcpy.c: Likewise. * benchtests/bench-strcpy_chk.c: Likewise. * benchtests/bench-strlen.c: Likewise. * benchtests/bench-strncasecmp.c: Likewise. * benchtests/bench-strncmp.c: Likewise. * benchtests/bench-strncpy.c: Likewise. * benchtests/bench-strnlen.c: Likewise. * benchtests/bench-strpbrk.c: Likewise. * benchtests/bench-strrchr.c: Likewise. * benchtests/bench-strsep.c: Likewise. * benchtests/bench-strspn.c: Likewise. * benchtests/bench-strstr.c: Likewise. * benchtests/bench-strtok.c: Likewise.
* Update copyright dates with scripts/update-copyrights.Joseph Myers2016-01-041-1/+1
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* Update copyright dates with scripts/update-copyrights.Joseph Myers2015-01-021-1/+1
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* Update copyright notices with scripts/update-copyrightsAllan McRae2014-01-011-1/+1
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* benchtests: Switch string benchmarks to use bench-timing.h.Will Newton2013-09-041-19/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Switch the string benchmarks to using bench-timing.h instead of hp-timing.h directly. This allows the string benchmarks to be run usefully on architectures such as ARM that do not have support for hp-timing.h. In order to do this the tests have been changed from timing each individual call and picking the lowest execution time recorded to timing a number of calls and taking the mean execution time. ChangeLog: 2013-09-04 Will Newton <will.newton@linaro.org> * benchtests/bench-timing.h (TIMING_PRINT_MEAN): New macro. * benchtests/bench-string.h: Include bench-timing.h instead of including hp-timing.h directly. (INNER_LOOP_ITERS): New define. (HP_TIMING_BEST): Delete macro. (test_init): Remove call to HP_TIMING_DIFF_INIT. * benchtests/bench-memccpy.c: Use bench-timing.h macros instead of hp-timing.h macros. * benchtests/bench-memchr.c: Likewise. * benchtests/bench-memcmp.c: Likewise. * benchtests/bench-memcpy.c: Likewise. * benchtests/bench-memmem.c: Likewise. * benchtests/bench-memmove.c: Likewise. * benchtests/bench-memset.c: Likewise. * benchtests/bench-rawmemchr.c: Likewise. * benchtests/bench-strcasecmp.c: Likewise. * benchtests/bench-strcasestr.c: Likewise. * benchtests/bench-strcat.c: Likewise. * benchtests/bench-strchr.c: Likewise. * benchtests/bench-strcmp.c: Likewise. * benchtests/bench-strcpy.c: Likewise. * benchtests/bench-strcpy_chk.c: Likewise. * benchtests/bench-strlen.c: Likewise. * benchtests/bench-strncasecmp.c: Likewise. * benchtests/bench-strncat.c: Likewise. * benchtests/bench-strncmp.c: Likewise. * benchtests/bench-strncpy.c: Likewise. * benchtests/bench-strnlen.c: Likewise. * benchtests/bench-strpbrk.c: Likewise. * benchtests/bench-strrchr.c: Likewise. * benchtests/bench-strspn.c: Likewise. * benchtests/bench-strstr.c: Likewise.
* Copy over string performance tests into benchtestsSiddhesh Poyarekar2013-06-111-0/+183
Copy over already existing string performance tests into benchtests. Bits not related to performance measurements have been omitted.
generated by cgit-pink 1.4.1 (git 2.36.1) at 2024-06-14 04:04:17 +0000