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2011-08-20Use kwset in grepLibravatar Fredrik Kuivinen1-2/+2
Benchmarks for the hot cache case: before: $ perf stat --repeat=5 git grep qwerty > /dev/null Performance counter stats for 'git grep qwerty' (5 runs): 3,478,085 cache-misses # 2.322 M/sec ( +- 2.690% ) 11,356,177 cache-references # 7.582 M/sec ( +- 2.598% ) 3,872,184 branch-misses # 0.363 % ( +- 0.258% ) 1,067,367,848 branches # 712.673 M/sec ( +- 2.622% ) 3,828,370,782 instructions # 0.947 IPC ( +- 0.033% ) 4,043,832,831 cycles # 2700.037 M/sec ( +- 0.167% ) 8,518 page-faults # 0.006 M/sec ( +- 3.648% ) 847 CPU-migrations # 0.001 M/sec ( +- 3.262% ) 6,546 context-switches # 0.004 M/sec ( +- 2.292% ) 1497.695495 task-clock-msecs # 3.303 CPUs ( +- 2.550% ) 0.453394396 seconds time elapsed ( +- 0.912% ) after: $ perf stat --repeat=5 git grep qwerty > /dev/null Performance counter stats for 'git grep qwerty' (5 runs): 2,989,918 cache-misses # 3.166 M/sec ( +- 5.013% ) 10,986,041 cache-references # 11.633 M/sec ( +- 4.899% ) (scaled from 95.06%) 3,511,993 branch-misses # 1.422 % ( +- 0.785% ) 246,893,561 branches # 261.433 M/sec ( +- 3.967% ) 1,392,727,757 instructions # 0.564 IPC ( +- 0.040% ) 2,468,142,397 cycles # 2613.494 M/sec ( +- 0.110% ) 7,747 page-faults # 0.008 M/sec ( +- 3.995% ) 897 CPU-migrations # 0.001 M/sec ( +- 2.383% ) 6,535 context-switches # 0.007 M/sec ( +- 1.993% ) 944.384228 task-clock-msecs # 3.177 CPUs ( +- 0.268% ) 0.297257643 seconds time elapsed ( +- 0.450% ) So we gain about 35% by using the kwset code. As a side effect of using kwset two grep tests are fixed by this patch. The first is fixed because kwset can deal with case-insensitive search containing NULs, something strcasestr cannot do. The second one is fixed because we consider patterns containing NULs as fixed strings (regcomp cannot accept patterns with NULs). Signed-off-by: Fredrik Kuivinen <frekui@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-09-09t/t7008: workaround broken handling of \000 by printf on IRIXLibravatar Brandon Casey1-7/+7
On IRIX 6.5, the printf utility in /usr/bin does not appear to handle the \ddd notation according to POSIX. This printf appears to halt processing of the string argument and ignore any additional characters in the string. Work around this flaw by replacing the \000's with 'Q' and using the q_to_nul helper function provided by test-lib.sh This problem with printf is not apparent when using the Bash shell since Bash implements a POSIX compatible printf function internally. Signed-off-by: Brandon Casey <casey@nrlssc.navy.mil> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-08-19t/t7008-grep-binary.sh: un-TODO a test that needs REG_STARTENDLibravatar Ævar Arnfjörð Bjarmason1-1/+1
Now that we have a regex engine that supports REG_STARTEND this test should fail if "git grep" can't grep NULL characters. Platforms that don't have a POSIX regex engine which supports REG_STARTEND should always define NO_REGEX=YesPlease when compiling. Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Acked-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-05-24grep: support NUL chars in search strings for -FLibravatar René Scharfe1-0/+30
Search patterns in a file specified with -f can contain NUL characters. The current code ignores all characters on a line after a NUL. Pass the actual length of the line all the way from the pattern file to fixmatch() and use it for case-sensitive fixed string matching. Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-05-24grep: use REG_STARTEND for all matching if availableLibravatar René Scharfe1-0/+10
Refactor REG_STARTEND handling inlook_ahead() into a new helper, regmatch(), and use it for line matching, too. This allows regex matching beyond NUL characters if regexec() supports the flag. NUL characters themselves are not matched in any way, though. Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-05-24grep: continue case insensitive fixed string search after NUL charsLibravatar René Scharfe1-0/+4
Functions for C strings, like strcasestr(), can't see beyond NUL characters. Check if there is such an obstacle on the line and try again behind it. Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-05-24grep: use memmem() for fixed string searchLibravatar René Scharfe1-0/+4
Allow searching beyond NUL characters by using memmem() instead of strstr(). Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-05-24grep: --name-only over binaryLibravatar René Scharfe1-0/+6
As with the option -c/--count, git grep with the option -l/--name-only should work the same with binary files as with text files because there is no danger of messing up the terminal with control characters from the contents of matching files. GNU grep does the same. Move the check for ->name_only before the one for binary_match_only, thus making the latter irrelevant for git grep -l. Reported-by: Dmitry Potapov <dpotapov@gmail.com> Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-05-24grep: --count over binaryLibravatar René Scharfe1-0/+6
The intent of showing the message "Binary file xyz matches" for binary files is to avoid annoying users by potentially messing up their terminals by printing control characters. In --count mode, this precaution isn't necessary. Display counts of matches if -c/--count was specified, even if -a was not given. GNU grep does the same. Moving the check for ->count before the code for handling binary file also avoids printing context lines if --count and -[ABC] were used together, so we can remove the part of the comment that mentions this behaviour. Again, GNU grep does the same. Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-05-24grep: add test script for binary file handlingLibravatar René Scharfe1-0/+42
Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <gitster@pobox.com>