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2019-01-01Update copyright dates with scripts/update-copyrights.Joseph Myers
* 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.
2018-12-27Improve bench-strlenWilco Dijkstra
The current bench-strlen compares against a slow byte-oriented strlen which is not useful given it's too easy to beat. Remove it and compare against the generic C strlen version and memchr. * benchtests/bench-strlen.c (generic_strlen): New function. (memchr_strlen): New function.
2018-12-21Refactor string benchtestsWilco Dijkstra
Refactor string benchtests by moving duplicated defines into bench-string.h. * benchtests/bench-memchr.c: Cleanup defines. * benchtests/bench-memcmp.c: Likewise. * benchtests/bench-memset.c: Likewise. * benchtests/bench-memset-large.c: Likewise. * benchtests/bench-memset-walk.c: Likewise. * benchtests/bench-stpcpy.c: Likewise. * benchtests/bench-stpncpy.c: Likewise. * benchtests/bench-strcat.c: Likewise. * benchtests/bench-strchr.c: Likewise. * benchtests/bench-strcmp.c: Likewise. * benchtests/bench-strcpy.c: Likewise. * benchtests/bench-strcspn.c: Likewise. * benchtests/bench-string.h: Likewise. * benchtests/bench-strlen.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.
2018-12-12benchtests: send non-consumable data to stderrLeonardo Sandoval
Non-consumable data, alias data not related to benchmarks, should be sent to the standard error, thus pipelines can work as expected. * benchtests/scripts/compare_bench.py (do_compare): write to stderr in case stat is not present. * benchtests/scripts/compare_bench.py (plot_graphs): write to stderr in case timings field is not present. Also string showing the output filename goes into the stderr.
2018-12-12benchtests: include --stats parameterLeonardo Sandoval
Allows user to pick a statistic, defaulting to min and mean, from command line. At the same time, if stat does not exit, catch the run-time exception and keep comparing the rest of benchmarked functions. Finally, take care of division-by-zero exceptions and as the latter, keep comparing the rest of the functions, turning the script a bit more fault tolerant thus useful. * benchtests/scripts/compare_bench.py (do_compare): Catch KeyError and ZeroDivisorError exceptions. * benchtests/scripts/compare_bench.py (compare_runs): Use stats argument to loop through user provided statistics. * benchtests/scripts/compare_bench.py (main): Include the --stats argument.
2018-12-12benchtests: keep comparing even if function timings do not matchLeonardo Sandoval
Allows other functions to be processed, making the script a bit more fault tolerant thus useful. * benchtests/scripts/compare_bench.py (compare_runs): Continue instead of return.
2018-10-29Patch to require Python 3.4 or later to build glibc.Joseph Myers
This patch makes Python 3.4 or later a required tool for building glibc, so allowing changes of awk, perl etc. code used in the build and test to Python code without any such changes needing makefile conditionals or to handle older Python versions. This patch makes the configure test for Python check the version and give an error if Python is missing or too old, and removes makefile conditionals that are no longer needed. It does not itself convert any code from another language to Python, and does not remove any compatibility with older Python versions from existing scripts. Tested for x86_64. * configure.ac (PYTHON_PROG): Use AC_CHECK_PROG_VER. Set critic_missing for versions before 3.4. * configure: Regenerated. * manual/install.texi (Tools for Compilation): Document requirement for Python to build glibc. * INSTALL: Regenerated. * Rules [PYTHON]: Make code unconditional. * benchtests/Makefile [PYTHON]: Likewise. * conform/Makefile [PYTHON]: Likewise. * manual/Makefile [PYTHON]: Likewise. * math/Makefile [PYTHON]: Likewise.
2018-10-24x86: Support RDTSCP for benchtestsH.J. Lu
RDTSCP waits until all previous instructions have executed and all previous loads are globally visible before reading the counter. RDTSC doesn't wait until all previous instructions have been executed before reading the counter. All x86 processors since 2010 support RDTSCP instruction. This patch adds RDTSCP support to benchtests. * benchtests/Makefile (CPPFLAGS-nonlib): Add -DUSE_RDTSCP if USE_RDTSCP is defined. * sysdeps/x86/hp-timing.h (HP_TIMING_NOW): Use RDTSCP if USE_RDTSCP is defined.
2018-10-17Don't reduce test timeout to less than defaultAndreas Schwab
This removes all overrides of TIMEOUT that are less than or equal to the default timeout.
2018-10-08benchtests: Set float type on --threshold argumentLeonardo Sandoval
Otherwise, we see the following runtime error when using the parameter: File "./glibc/benchtests/scripts/compare_bench.py", line 46, in do_compare if d > threshold: TypeError: '>' not supported between instances of 'float' and 'str' * benchtests/scripts/compare_bench.py (main): set float type on threshold argument.
2018-08-16Reallocate buffers for every run in strlenSiddhesh Poyarekar
Try and avoid influencing performance of neighbouring functions.
2018-08-16Print strlen benchmark output in jsonSiddhesh Poyarekar
Allow reading the benchmark using the compare_strings.py script.
2018-08-11[benchtests] Add workload test properties to schemaSiddhesh Poyarekar
Add the workload test properties (max-throughput, latency, etc.) to the schema to prevent benchmark output validation from failing. * benchtests/scripts/benchout.schema.json (properties): Add new properties.
2018-08-11[benchtests] Add mandatory attributes to workload testsSiddhesh Poyarekar
Add the duration and iterations attributes to the workloads tests to make the json schema parser happy * benchtests/bench-skeleton.c (main): Add duration and iterations attributes.
2018-08-08benchtests: Clean up the alloc_bufsSiddhesh Poyarekar
Drop realloc_bufs in favour of making alloc_bufs transparently reallocate the buffers if it had allocated before. Also consolidate computation of buffer lengths so that they don't get repeated on every reallocation. * benchtests/bench-string.h (buf1_size, buf2_size): New variables. (init_sizes): New function. (test_init): Use it. (alloc_buf, exit_error): New functions. (alloc_bufs): Use ALLOC_BUF. (realloc_bufs): Remove. * benchtests/bench-memcmp.c (do_test): Adjust. * benchtests/bench-memset-large.c (do_test): Likewise. * benchtests/bench-memset-walk.c (do_test): Likewise. * benchtests/bench-memset.c (do_test): Likewise. * benchtests/bench-strncmp.c (do_test): Likewise.
2018-08-03[benchtests] Fix compare_strings.py for python2Siddhesh Poyarekar
Python 2 does not have a FileNotFoundError so drop it in favour of simply printing out the last (and most informative) line of the exception. * benchtests/scripts/compare_strings.py: Import traceback. (parse_file): Pretty-print error.
2018-07-19benchtests: improve argument parsing through argparse libraryLeonardo Sandoval
The argparse library is used on compare_bench script to improve command line argument parsing. The 'schema validation file' is now optional, reducing by one the number of required parameters. * benchtests/scripts/compare_bench.py (__main__): use the argparse library to improve command line parsing. (__main__): make schema file as optional parameter (--schema), defaulting to benchtests/scripts/benchout.schema.json. (main): move out of the parsing stuff to __main_  and leave it only as caller of main comparison functions.
2018-07-16Improve strstr performanceWilco Dijkstra
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>
2018-06-12benchtests: Add -f/--functions argumentH.J. Lu
On x86-64, there may be multiple IFUNC implementations for a given function. But we may be only interested in a subset of them. This patch adds -f/--functions argument to compare a subset of IFUNC implementations. * benchtests/scripts/compare_strings.py (process_results): Add funcs argument. Compare only functions which are selected. (main): Check if base function is among selected functions. Pass selected functions to process_results. (__main__): Add -f/--functions argument.
2018-06-01benchtests: Catch exceptions in input argumentsLeonardo Sandoval
Catch runtime exceptions in case the user provided: wrong base function, attribute(s) or input file. In any of the latter, quit immediately with non-zero return code. * benchtests/scripts/compare_string.py: (process_results) Catch exception in non-existent base_func and catch exception in non-existent attribute. (parse_file) Catch exception in non-existent input file.
2018-06-01benchtests: Add --no-diff and --no-header optionsLeonardo Sandoval
Having a string comparison report with neither diff numbers nor header yields a more useful output to be consumed by other tools. * benchtests/scripts/compare_string.py: Add --no-diff and --no-header options to avoid diff calculation and omit header, respectively. (main): process --no-diff and --no-header
2018-05-07benchtests: Move iterator declaration into loop headerSiddhesh Poyarekar
This is a minor style change to move the definition of I to its usage scope instead of at the top of the function. This is consistent with glibc style guidelines and more importantly it was getting in the way of my testing. * benchtests/bench-memcpy-walk.c (do_test): Move declaration of I into loop header. * benchtests/bench-memmove-walk.c (do_test): Likewise.
2018-03-19Undefine attribute_hidden to fix benchtestsWilco Dijkstra
Add an undefine of attribute_hidden since it may be defined in some cases (it must be defined since it is used by some hp-timing configurations). * benchtests/bench-timing.h (attribute_hidden): Undefine.
2018-03-15Use correct includes in benchtestsWilco Dijkstra
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.
2018-03-06benchtests: Don't benchmark 0 length calls for strncmpSiddhesh Poyarekar
The 0 length strncmp is interesting for correctness but not for performance. * benchtests/bench-strncmp.c (test_main): Remove 0 length tests. (do_test_limit): Likewise.
2018-03-06benchtests: Reallocate buffers for every strncmp implementationSiddhesh Poyarekar
Don't reuse buffers for different strncmp implementations since the earlier implementation will end up warming the cache for the later one. Eventually there should be a more elegant way to do this. * benchtests/bench-strncmp.c (do_test_limit): Reallocate buffers for every implementation. (do_test): Likewise.
2018-03-06benchtests: Convert strncmp benchmark output to jsonSiddhesh Poyarekar
Make the output usable through the compare_strings.py script. * benchtests/bench-strncmp.c: Convert output to json.
2018-02-12Remove slow paths from powWilco Dijkstra
Remove the slow paths from pow. Like several other double precision math functions, pow is exactly rounded. This is not required from math functions and causes major overheads as it requires multiple fallbacks using higher precision arithmetic if a result is close to 0.5ULP. Ridiculous slowdowns of up to 100000x have been reported when the highest precision path triggers. All GLIBC math tests pass on AArch64 and x64 (with ULP of pow set to 1). The worst case error is ~0.506ULP. A simple test over a few hundred million values shows pow is 10% faster on average. This fixes BZ #13932. [BZ #13932] * sysdeps/ieee754/dbl-64/uexp.h (err_1): Remove. * benchtests/pow-inputs: Update comment for slow path cases. * manual/probes.texi (slowpow_p10): Delete removed probe. (slowpow_p10): Likewise. * math/Makefile: Remove halfulp.c and slowpow.c. * sysdeps/aarch64/libm-test-ulps: Set ULP of pow to 1. * sysdeps/generic/math_private.h (__exp1): Remove error argument. (__halfulp): Remove. (__slowpow): Remove. * sysdeps/i386/fpu/halfulp.c: Delete file. * sysdeps/i386/fpu/slowpow.c: Likewise. * sysdeps/ia64/fpu/halfulp.c: Likewise. * sysdeps/ia64/fpu/slowpow.c: Likewise. * sysdeps/ieee754/dbl-64/e_exp.c (__exp1): Remove error argument, improve comments and add error analysis. * sysdeps/ieee754/dbl-64/e_pow.c (__ieee754_pow): Add error analysis. (power1): Remove function: (log1): Remove error argument, add error analysis. (my_log2): Remove function. * sysdeps/ieee754/dbl-64/halfulp.c: Delete file. * sysdeps/ieee754/dbl-64/slowpow.c: Likewise. * sysdeps/m68k/m680x0/fpu/halfulp.c: Likewise. * sysdeps/m68k/m680x0/fpu/slowpow.c: Likewise. * sysdeps/powerpc/power4/fpu/Makefile: Remove CPPFLAGS-slowpow.c. * sysdeps/x86_64/fpu/libm-test-ulps: Set ULP of pow to 1. * sysdeps/x86_64/fpu/multiarch/Makefile: Remove slowpow-fma.c, slowpow-fma4.c, halfulp-fma.c, halfulp-fma4.c. * sysdeps/x86_64/fpu/multiarch/e_pow-fma.c (__slowpow): Remove define. * sysdeps/x86_64/fpu/multiarch/e_pow-fma4.c (__slowpow): Likewise. * sysdeps/x86_64/fpu/multiarch/halfulp-fma.c: Delete file. * sysdeps/x86_64/fpu/multiarch/halfulp-fma4.c: Likewise. * sysdeps/x86_64/fpu/multiarch/slowpow-fma.c: Likewise. * sysdeps/x86_64/fpu/multiarch/slowpow-fma4.c: Likewise.
2018-02-02benchtests: Make bench-memcmp print jsonSiddhesh Poyarekar
The benchamrk result can now be studied using the compare_strings.py script. * benchtests/bench-memcmp.c: Print json instead of plain text.
2018-02-02benchtests: Reallocate buffers for every test runSiddhesh Poyarekar
Keeping the buffers the same across test runs gives later invocations the advantage since they access cached data. Reallocate so that all test runs are on equal grounds. * benchtests/bench-memcmp.c (do_test): Call realloc_buf for every test run.
2018-01-01Update copyright dates with scripts/update-copyrights.Joseph Myers
* 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.
2017-12-15Convert strcmp benchmark output to json formatSiddhesh Poyarekar
The format is now parseable with the compare_strings.py script.
2017-11-28benchtests: Enable BENCHSET to run subset of testsVictor Rodriguez
This patch adds BENCHSET variable to benchtests/Makefile in order to provide the capability to run a list of subsets of benchmark tests, ie; make bench BENCHSET="bench-pthread bench-math malloc-thread" This helps users to benchmark specific glibc area ChangeLog: * benchtests/Makefile:Add BENCHSET to allow subsets of benchmarks to be run. * benchtests/README: Add documentation for: Running subsets of benchmarks. Signed-off-by: Victor Rodriguez <victor.rodriguez.bahena@intel.com> Signed-off-by: Icarus Sparry <icarus.w.sparry@intel.com> Reviewed-By: Siddhesh Poyarekar <siddhesh@sourceware.org>
2017-11-28benchtests: Expand range of tests names in schema.jsonVictor Rodriguez
When executing bench-math the benchmark output is invalid with this error msg: Invalid benchmark output: 'workload-spec2006.wrf' does not match any of the regexes: '^[_a-zA-Z0-9]*$¹ or Invalid benchmark output: Additional properties are not allowed ('workload-spec2006.wrf' was unexpected) The error was seen when running the test: workload-spec2006.wrf, 'stack=1024,guard=1' and 'stack=1024,guard=2'. The problem is that the current regex's do not accept the hyphen, dot, equal and comma in the output. This patch changes the regex in benchout.schema.json to accept symbols in benchmark tests names. ChangeLog: * benchtests/scripts/benchout.schema.json: Fix regex to accept a wider range of tests names. Signed-off-by: Victor Rodriguez <victor.rodriguez.bahena@intel.com> Reviewed-By: Siddhesh Poyarekar <siddhesh@sourceware.org>
2017-11-28benchtests: Adjust valid and accepted propertiesVictor Rodriguez
Benchmark workload-spec2006.wrf does not produce max, min or mean results but instead produce throughput. This is represented in benchtests/bench-skeleton.c. This patch adjust benchout.schema.json to consider bench.out from bench-math benchmarks as valid ChangeLog: * benchtests/scripts/benchout.schema.json: Add throughput as accepted result from property and remove "max", min" and "mean" from required properties based on benchtests/bench-skeleton.c. Signed-off-by: Victor Rodriguez <victor.rodriguez.bahena@intel.com> Reviewed-By: Siddhesh Poyarekar <siddhesh@sourceware.org>
2017-11-20benchtests: Bump start size since smaller sizes are noisySiddhesh Poyarekar
Numbers for very small sizes (< 128B) are much noisier for non-cached benchmarks like the walk benchmarks, so don't include them. * benchtests/bench-memcpy-walk.c (START_SIZE): Set to 128. * benchtests/bench-memmove-walk.c (START_SIZE): Likewise. * benchtests/bench-memset-walk.c (START_SIZE): Likewise.
2017-11-20benchtests: Fix walking sizes and directions for *-walk benchmarksSiddhesh Poyarekar
Make the walking benchmarks walk only backwards since copying both ways is biased in favour of implementations that use non-temporal stores for larger sizes; falkor is one of them. This also fixes up bugs in computation of the result which ended up multiplying the length with the timing result unnecessarily. * benchtests/bench-memcpy-walk.c (do_one_test): Copy only backwards. Fix timing computation. * benchtests/bench-memmove-walk.c (do_one_test): Likewise. * benchtests/bench-memset-walk.c (do_one_test): Walk backwards on memset by N at a time. Fix timing computation.
2017-10-13Benchtests for sinf, cosf and sincosfRajalakshmi Srinivasaraghavan
Numbers used from cos and sin inputs.
2017-10-05benchtests: Memory walking benchmark for memmoveSiddhesh Poyarekar
This benchmark is an attempt to eliminate cache effects from string benchmarks. The benchmark walks both ways through a large memory area and copies different sizes of memory and alignments one at a time instead of looping around in the same memory area. This is a good metric to have alongside the simple memmove benchmark (which is only really useful for smaller sizes) especially for larger sizes where the likelihood of the call being done only once is pretty high. This benchmark is different from memcpy in that it also tests overlapping copies. * benchtests/bench-memmove-walk.c: New file. * benchtests/Makefile (string-benchset): Add it.
2017-10-05benchtests: Memory walking benchmark for memsetSiddhesh Poyarekar
This benchmark is an attempt to eliminate cache effects from string benchmarks. The benchmark walks backward through a large memory area and sets different sizes of memory and alignments one at a time instead of looping around in the same memory area. This is a good metric to have alongside the simple memset benchmark (which is only really useful for smaller sizes) especially for larger sizes where the likelihood of the call being done only once is pretty high. * benchtests/bench-memset-walk.c: New file. * benchtests/Makefile (string-benchset): Add it.
2017-10-05benchtests: Memory walking benchmark for memcpySiddhesh Poyarekar
This benchmark is an attempt to eliminate cache effects from string benchmarks. The benchmark walks both ways through a large memory area and copies different sizes of memory and alignments one at a time instead of looping around in the same memory area. This is a good metric to have alongside the other memcpy benchmarks, especially for larger sizes where the likelihood of the call being done only once is pretty high. * benchtests/bench-memcpy-walk.c: New file. * benchtests/Makefile (string-benchset): Add it.
2017-09-20Add exp2f and log2f benchmark traceSzabolcs Nagy
exp2f and log2f benchmark traces are just copies of the existing expf and logf traces from wrf_r. * benchtests/Makefile: Add exp2f and log2f benchmarks. * benchtests/exp2f-inputs: Copy of expf-inputs. * benchtests/log2f-inputs: Copy of logf-inputs.
2017-09-19Add logf traceWilco Dijkstra
Add a trace for logf. This is a reduced trace based on 2.8 billion samples extracted from wrf_r. * benchtests/Makefile: Add logf benchmark. * benchtests/logf-inputs: Add reduced trace from wrf_r.
2017-09-19Add expf traceWilco Dijkstra
Add a trace for expf. This is a reduced trace based on 2.4 billion samples extracted from wrf_r. * benchtests/Makefile: Add expf benchmark. * benchtests/expf-inputs: Add reduced trace from wrf_r.
2017-09-19Add benchtests for trunc and truncf.Joseph Myers
This patch adds benchtests for the trunc and truncf functions. The inputs listed are fairly arbitrary; I do not assert they are representative of any particular application. * benchtests/Makefile (bench-math): Add trunc and truncf. (CFLAGS-bench-trunc.c): New variable. (CFLAGS-bench-truncf.c): Likewise. * benchtests/trunc-inputs: New file. * benchtests/truncf-inputs: Likewise.
2017-09-16benchtests: New -g option to generate graphs in compare_strings.pySiddhesh Poyarekar
The compare_strings.py option unconditionally generates a graph PNG image of the input data, which can be unnecessary and slow. Put this behind an optional flag -g. * benchtests/scripts/compare_strings.py: New option -g. (draw_graph): Print a message that a graph is being generated. (process_results): Generate graph only if -g is passed. (main): Process option -g.
2017-09-16benchtests: Make compare_strings.py output a bit prettierSiddhesh Poyarekar
Make the column widths for the outputs fixed so that they look a little less messy. They will still look bad with lots of IFUNCs (like on x86) but it's still a step forward. * benchtests/scripts/compare_strings.py (process_results): Better spacing for output.
2017-09-16benchtests: Use argparse to parse argumentsSiddhesh Poyarekar
Make the script more usable by adding proper command line options along with a way to query the options. The script is capable of doing a bunch of things right now like choosing a base for comparison, choosing to generate graphs, etc. and they should be accessible via command line switches. * benchtests/scripts/compare_strings.py: Use argparse. * benchtests/README: Document existence of compare_strings.py.
2017-09-14benchtests: Reallocate buffers for memsetSiddhesh Poyarekar
Keeping the same buffers along with copying the same size of data into the same location means that the first routine is typically the slowest since it has to bear the cost of fetching data into to cache. Reallocating buffers stabilizes numbers by a bit. * benchtests/bench-string.h (realloc_bufs): New function. (test_init): Call it. * benchtests/bench-memset-large.c (do_test): Likewise. * benchtests/bench-memset.c (do_test): Likewise.
2017-09-14benchtests: Make memset benchmarks print jsonSiddhesh Poyarekar
Make the memset benchmarks (bench-memset and bench-memset-large) print their output in JSON so that they can be evaluated using the compare_strings.py script. * benchtests/bench-memset-large.c: Print output in JSON format. * benchtests/bench-memset.c: Likewise.
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