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[58.152.77.182]) by smtp.gmail.com with ESMTPSA id n19-20020a17090a929300b001f02a72f29csm776529pjo.8.2022.07.12.23.58.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 12 Jul 2022 23:58:22 -0700 (PDT) Date: Wed, 13 Jul 2022 14:58:17 +0800 From: Leo Yan To: carsten.haitzler@foss.arm.com Cc: linux-kernel@vger.kernel.org, coresight@lists.linaro.org, suzuki.poulose@arm.com, mathieu.poirier@linaro.org, mike.leach@linaro.org, linux-perf-users@vger.kernel.org, acme@kernel.org Subject: Re: [PATCH 01/14] perf test: Refactor shell tests allowing subdirs Message-ID: <20220713065817.GC1354743@leoy-ThinkPad-X240s> References: <20220712135750.2212005-1-carsten.haitzler@foss.arm.com> <20220712135750.2212005-2-carsten.haitzler@foss.arm.com> <20220713065328.GB1354743@leoy-ThinkPad-X240s> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220713065328.GB1354743@leoy-ThinkPad-X240s> X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Correct the typo for Carsten's email address, sorry I inputed some unexpected chars. On Wed, Jul 13, 2022 at 02:53:28PM +0800, Leo Yan wrote: > On Tue, Jul 12, 2022 at 02:57:37PM +0100, carsten.haitzler@foss.arm.com wrote: > > From: "Carsten Haitzler (Rasterman)" > > > > This is a prelude to adding more tests to shell tests and in order to > > support putting those tests into subdirectories, I need to change the > > test code that scans/finds and runs them. > > > > To support subdirs I have to recurse so it's time to refactor the code to > > allow this and centralize the shell script finding into one location and > > only one single scan that builds a list of all the found tests in memory > > instead of it being duplicated in 3 places. > > > > This code also optimizes things like knowing the max width of desciption > > strings (as we can do that while we scan instead of a whole new pass > > of opening files). It also more cleanly filters scripts to see only > > *.sh files thus skipping random other files in directories like *~ > > backup files, other random junk/data files that may appear and the > > scripts must be executable to make the cut (this ensures the script > > lib dir is not seen as scripts to run). This avoids perf test running > > previous older versions of test scripts that are editor backup files > > as well as skipping perf.data files that may appear and so on. > > > > Signed-off-by: Carsten Haitzler > > --- > > tools/perf/tests/Build | 1 + > > tools/perf/tests/builtin-test-list.c | 201 +++++++++++++++++++++++++++ > > tools/perf/tests/builtin-test-list.h | 12 ++ > > tools/perf/tests/builtin-test.c | 152 +++----------------- > > 4 files changed, 232 insertions(+), 134 deletions(-) > > create mode 100644 tools/perf/tests/builtin-test-list.c > > create mode 100644 tools/perf/tests/builtin-test-list.h > > > > diff --git a/tools/perf/tests/Build b/tools/perf/tests/Build > > index af2b37ef7c70..2064a640facb 100644 > > --- a/tools/perf/tests/Build > > +++ b/tools/perf/tests/Build > > @@ -1,6 +1,7 @@ > > # SPDX-License-Identifier: GPL-2.0 > > > > perf-y += builtin-test.o > > +perf-y += builtin-test-list.o > > perf-y += parse-events.o > > perf-y += dso-data.o > > perf-y += attr.o > > diff --git a/tools/perf/tests/builtin-test-list.c b/tools/perf/tests/builtin-test-list.c > > new file mode 100644 > > index 000000000000..1e60088c1005 > > --- /dev/null > > +++ b/tools/perf/tests/builtin-test-list.c > > @@ -0,0 +1,201 @@ > > +/* SPDX-License-Identifier: GPL-2.0 */ > > +#include > > +#include > > +#include > > +#include > > +#include > > +#include > > +#include > > +#include > > +#include > > +#include "builtin.h" > > +#include "hist.h" > > +#include "intlist.h" > > +#include "tests.h" > > +#include "debug.h" > > +#include "color.h" > > +#include > > +#include "string2.h" > > +#include "symbol.h" > > +#include "util/rlimit.h" > > +#include > > +#include > > +#include > > +#include > > I know some files in perf do not strictly use the alphabet ordering > for headers, but this is the convention for Linux mainline code. > > It would be better to use the below ordering (just an example which > doesn't contain complete headers for this patch): > > > + > > +#include "builtin-test-list.h" > > + > > +#include > > #include > #include > #include > ... > #include > #include > #include > #include > #include > ... > #include > > #include "builtin.h" > #include "debug.h" > ... > > > + > > +/* As this is a singleton built once for the run of the process, there is > > + * no value in trying to free it and just let it stay around until process > > + * exits when it's cleaned up. */ > > Multple comments format is: > > /* > * As this is a singleton built once for the run of the process, there is > * no value in trying to free it and just let it stay around until process > * exits when it's cleaned up. > */ > > > +static size_t files_num = 0; > > +static struct script_file *files = NULL; > > +static int files_max_width = 0; > > + > > +static const char *shell_tests__dir(char *path, size_t size) > > +{ > > + const char *devel_dirs[] = { "./tools/perf/tests", "./tests", }; > > + char *exec_path; > > + unsigned int i; > > + > > + for (i = 0; i < ARRAY_SIZE(devel_dirs); ++i) { > > + struct stat st; > > + > > + if (!lstat(devel_dirs[i], &st)) { > > + scnprintf(path, size, "%s/shell", devel_dirs[i]); > > + if (!lstat(devel_dirs[i], &st)) > > + return path; > > + } > > + } > > + > > + /* Then installed path. */ > > + exec_path = get_argv_exec_path(); > > + scnprintf(path, size, "%s/tests/shell", exec_path); > > + free(exec_path); > > + return path; > > +} > > + > > +static const char *shell_test__description(char *description, size_t size, > > + const char *path, const char *name) > > +{ > > + FILE *fp; > > + char filename[PATH_MAX]; > > + int ch; > > + > > + path__join(filename, sizeof(filename), path, name); > > + fp = fopen(filename, "r"); > > + if (!fp) > > + return NULL; > > + > > + /* Skip first line - should be #!/bin/sh Shebang */ > > + do { > > + ch = fgetc(fp); > > + } while (ch != EOF && ch != '\n'); > > + > > + description = fgets(description, size, fp); > > + fclose(fp); > > + > > + /* Assume first char on line is omment everything after that desc */ > > + return description ? strim(description + 1) : NULL; > > +} > > + > > +static bool is_shell_script(const char *path) > > +{ /* is this full file path a shell script */ > > + const char *ext; > > + > > + ext = strrchr(path, '.'); > > + if (!ext) > > + return false; > > + if (!strcmp(ext, ".sh")) { /* Has .sh extension */ > > + if (access(path, R_OK | X_OK) == 0) /* Is executable */ > > + return true; > > + } > > + return false; > > +} > > + > > +static bool is_test_script(const char *path, const char *name) > > +{ /* Is this file in this dir a shell script (for test purposes) */ > > If this is a comment for function, place the comment on the top of the > function. > > > + char filename[PATH_MAX]; > > + > > + path__join(filename, sizeof(filename), path, name); > > This patch is not only for refactoring handling test sub folders, > there have many minor changes, IIUC, here it drops macro > for_each_shell_test() and is_directory(), etc. > > I am not saying this is wrong, but this is not easy for review. > > > + if (!is_shell_script(filename)) return false; > > if (!is_shell_script(filename)) > return false; > > > + return true; > > +} > > + > > +static char *strdup_check(const char *str) > > +{ /* Duplicate a string and fall over and die if we run out of memory */ > > Place comment on the top of function. > > > + char *newstr; > > + > > + newstr = strdup(str); > > + if (!newstr) { > > + pr_err("Out of memory while duplicating test script string\n"); > > + abort(); > > + } > > + return newstr; > > +} > > + > > +static void append_script(const char *dir, const char *file, const char *desc) > > +{ > > + struct script_file *files_tmp; > > + size_t files_num_tmp; > > + int width; > > + > > + files_num_tmp = files_num + 1; > > + if (files_num_tmp < 1) { > > How about below condition checking? > > if (files_num_tmp >= SIZE_MAX) { > > > + pr_err("Too many script files\n"); > > + abort(); > > Can don't use abort() and return error, so upper function can handle > the error gracefully? > > > + } > > + /* Realloc is good enough, though we could realloc by chunks, not that > > + * anyone will ever measure performance here */ > > + files_tmp = realloc(files, > > + (files_num_tmp + 1) * sizeof(struct script_file)); > > files = realloc(files, > (files_num_tmp + 1) * sizeof(struct script_file)); > > BTW, I don't see any where to free the memory for "files". > > > + if (files_tmp == NULL) { > > + pr_err("Out of memory while building test list\n"); > > + abort(); > > + } > > + /* Add file to end and NULL terminate the struct array */ > > + files = files_tmp; > > + files_num = files_num_tmp; > > + files[files_num - 1].dir = strdup_check(dir); > > + files[files_num - 1].file = strdup_check(file); > > + files[files_num - 1].desc = strdup_check(desc); > > + files[files_num].dir = NULL; > > + files[files_num].file = NULL; > > + files[files_num].desc = NULL; > > I personally think here it's over complex for using the last item in the > array as a redundant item and set NULL to its fields. We have the > global variable "files_num", which can be used for checking boundary > for the array. > > > + > > + width = strlen(desc); /* Track max width of desc */ > > + if (width > files_max_width) > > + files_max_width = width; > > +} > > + > > +static void append_scripts_in_dir(const char *path) > > +{ > > + struct dirent **entlist; > > + struct dirent *ent; > > + int n_dirs, i; > > + char filename[PATH_MAX]; > > + > > + /* List files, sorted by alpha */ > > + n_dirs = scandir(path, &entlist, NULL, alphasort); > > + if (n_dirs == -1) > > + return; > > + for (i = 0; i < n_dirs && (ent = entlist[i]); i++) { > > + if (ent->d_name[0] == '.') continue; /* Skip hidden files */ > > Here really need to check '.'? The function is_shell_script() has > checked for hidden files. > > The code format should be: > > /* Skip hidden files */ > if (ent->d_name[0] == '.') > continue; > > > + if (is_test_script(path, ent->d_name)) { /* It's a test */ > > + char bf[256]; > > + const char *desc = shell_test__description > > + (bf, sizeof(bf), path, ent->d_name); > > + > > + if (desc) /* It has a desc line - valid script */ > > + append_script(path, ent->d_name, desc); > > + } else if (is_directory(path, ent)) { /* Scan the subdir */ > > + path__join(filename, sizeof(filename), > > + path, ent->d_name); > > + append_scripts_in_dir(filename); > > + } > > + } > > + for (i = 0; i < n_dirs; i++) /* Clean up */ > > + zfree(&entlist[i]); > > + free(entlist); > > +} > > + > > +const struct script_file *list_script_files(void) > > +{ > > + char path_dir[PATH_MAX]; > > + const char *path; > > + > > + if (files) return files; /* Singleton - we already know our list */ > > if (files) > return files; > > The rest part of this patch looks good to me. > > I strongly suggest you to consider how to organize the patches with > better format. This patch actually finishes below things: > > - Support sub folder searching for shell script (so the key change is > using the recursion in append_scripts_in_dir()); > - Refactoring to a common code for iterating testing scripts; > - Many minor refactoring, like dropping macro for_each_shell_test() > and introduces new function is_shell_script(). > > Seems every part above is deserved to use a separate patch, which would > be much easier for review. > > Thanks, > Leo > > > + > > + path = shell_tests__dir(path_dir, sizeof(path_dir)); /* Walk dir */ > > + append_scripts_in_dir(path); > > + > > + return files; > > +} > > + > > +int list_script_max_width(void) > > +{ > > + list_script_files(); /* Ensure we have scanned all scriptd */ > > + return files_max_width; > > +} > > diff --git a/tools/perf/tests/builtin-test-list.h b/tools/perf/tests/builtin-test-list.h > > new file mode 100644 > > index 000000000000..eb81f3aa6683 > > --- /dev/null > > +++ b/tools/perf/tests/builtin-test-list.h > > @@ -0,0 +1,12 @@ > > +/* SPDX-License-Identifier: GPL-2.0 */ > > + > > +struct script_file { > > + char *dir; > > + char *file; > > + char *desc; > > +}; > > + > > +/* List available script tests to run - singleton - never freed */ > > +const struct script_file *list_script_files(void); > > +/* Get maximum width of description string */ > > +int list_script_max_width(void); > > diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c > > index 81cf241cd109..7122eae1d98d 100644 > > --- a/tools/perf/tests/builtin-test.c > > +++ b/tools/perf/tests/builtin-test.c > > @@ -28,6 +28,8 @@ > > #include > > #include > > > > +#include "builtin-test-list.h" > > + > > static bool dont_fork; > > > > struct test_suite *__weak arch_tests[] = { > > @@ -274,91 +276,6 @@ static int test_and_print(struct test_suite *t, int subtest) > > return err; > > } > > > > -static const char *shell_test__description(char *description, size_t size, > > - const char *path, const char *name) > > -{ > > - FILE *fp; > > - char filename[PATH_MAX]; > > - int ch; > > - > > - path__join(filename, sizeof(filename), path, name); > > - fp = fopen(filename, "r"); > > - if (!fp) > > - return NULL; > > - > > - /* Skip shebang */ > > - do { > > - ch = fgetc(fp); > > - } while (ch != EOF && ch != '\n'); > > - > > - description = fgets(description, size, fp); > > - fclose(fp); > > - > > - return description ? strim(description + 1) : NULL; > > -} > > - > > -#define for_each_shell_test(entlist, nr, base, ent) \ > > - for (int __i = 0; __i < nr && (ent = entlist[__i]); __i++) \ > > - if (!is_directory(base, ent) && \ > > - is_executable_file(base, ent) && \ > > - ent->d_name[0] != '.') > > - > > -static const char *shell_tests__dir(char *path, size_t size) > > -{ > > - const char *devel_dirs[] = { "./tools/perf/tests", "./tests", }; > > - char *exec_path; > > - unsigned int i; > > - > > - for (i = 0; i < ARRAY_SIZE(devel_dirs); ++i) { > > - struct stat st; > > - if (!lstat(devel_dirs[i], &st)) { > > - scnprintf(path, size, "%s/shell", devel_dirs[i]); > > - if (!lstat(devel_dirs[i], &st)) > > - return path; > > - } > > - } > > - > > - /* Then installed path. */ > > - exec_path = get_argv_exec_path(); > > - scnprintf(path, size, "%s/tests/shell", exec_path); > > - free(exec_path); > > - return path; > > -} > > - > > -static int shell_tests__max_desc_width(void) > > -{ > > - struct dirent **entlist; > > - struct dirent *ent; > > - int n_dirs, e; > > - char path_dir[PATH_MAX]; > > - const char *path = shell_tests__dir(path_dir, sizeof(path_dir)); > > - int width = 0; > > - > > - if (path == NULL) > > - return -1; > > - > > - n_dirs = scandir(path, &entlist, NULL, alphasort); > > - if (n_dirs == -1) > > - return -1; > > - > > - for_each_shell_test(entlist, n_dirs, path, ent) { > > - char bf[256]; > > - const char *desc = shell_test__description(bf, sizeof(bf), path, ent->d_name); > > - > > - if (desc) { > > - int len = strlen(desc); > > - > > - if (width < len) > > - width = len; > > - } > > - } > > - > > - for (e = 0; e < n_dirs; e++) > > - zfree(&entlist[e]); > > - free(entlist); > > - return width; > > -} > > - > > struct shell_test { > > const char *dir; > > const char *file; > > @@ -385,33 +302,17 @@ static int shell_test__run(struct test_suite *test, int subdir __maybe_unused) > > static int run_shell_tests(int argc, const char *argv[], int i, int width, > > struct intlist *skiplist) > > { > > - struct dirent **entlist; > > - struct dirent *ent; > > - int n_dirs, e; > > - char path_dir[PATH_MAX]; > > - struct shell_test st = { > > - .dir = shell_tests__dir(path_dir, sizeof(path_dir)), > > - }; > > - > > - if (st.dir == NULL) > > - return -1; > > + struct shell_test st; > > + const struct script_file *files, *file; > > > > - n_dirs = scandir(st.dir, &entlist, NULL, alphasort); > > - if (n_dirs == -1) { > > - pr_err("failed to open shell test directory: %s\n", > > - st.dir); > > - return -1; > > - } > > - > > - for_each_shell_test(entlist, n_dirs, st.dir, ent) { > > + files = list_script_files(); > > + if (!files) > > + return 0; > > + for (file = files; file->dir; file++) { > > int curr = i++; > > - char desc[256]; > > struct test_case test_cases[] = { > > { > > - .desc = shell_test__description(desc, > > - sizeof(desc), > > - st.dir, > > - ent->d_name), > > + .desc = file->desc, > > .run_case = shell_test__run, > > }, > > { .name = NULL, } > > @@ -421,12 +322,13 @@ static int run_shell_tests(int argc, const char *argv[], int i, int width, > > .test_cases = test_cases, > > .priv = &st, > > }; > > + st.dir = file->dir; > > > > if (test_suite.desc == NULL || > > !perf_test__matches(test_suite.desc, curr, argc, argv)) > > continue; > > > > - st.file = ent->d_name; > > + st.file = file->file; > > pr_info("%3d: %-*s:", i, width, test_suite.desc); > > > > if (intlist__find(skiplist, i)) { > > @@ -436,10 +338,6 @@ static int run_shell_tests(int argc, const char *argv[], int i, int width, > > > > test_and_print(&test_suite, 0); > > } > > - > > - for (e = 0; e < n_dirs; e++) > > - zfree(&entlist[e]); > > - free(entlist); > > return 0; > > } > > > > @@ -448,7 +346,7 @@ static int __cmd_test(int argc, const char *argv[], struct intlist *skiplist) > > struct test_suite *t; > > unsigned int j, k; > > int i = 0; > > - int width = shell_tests__max_desc_width(); > > + int width = list_script_max_width(); > > > > for_each_test(j, k, t) { > > int len = strlen(test_description(t, -1)); > > @@ -529,36 +427,22 @@ static int __cmd_test(int argc, const char *argv[], struct intlist *skiplist) > > > > static int perf_test__list_shell(int argc, const char **argv, int i) > > { > > - struct dirent **entlist; > > - struct dirent *ent; > > - int n_dirs, e; > > - char path_dir[PATH_MAX]; > > - const char *path = shell_tests__dir(path_dir, sizeof(path_dir)); > > - > > - if (path == NULL) > > - return -1; > > + const struct script_file *files, *file; > > > > - n_dirs = scandir(path, &entlist, NULL, alphasort); > > - if (n_dirs == -1) > > - return -1; > > - > > - for_each_shell_test(entlist, n_dirs, path, ent) { > > + files = list_script_files(); > > + if (!files) > > + return 0; > > + for (file = files; file->dir; file++) { > > int curr = i++; > > - char bf[256]; > > struct test_suite t = { > > - .desc = shell_test__description(bf, sizeof(bf), path, ent->d_name), > > + .desc = file->desc > > }; > > > > if (!perf_test__matches(t.desc, curr, argc, argv)) > > continue; > > > > pr_info("%3d: %s\n", i, t.desc); > > - > > } > > - > > - for (e = 0; e < n_dirs; e++) > > - zfree(&entlist[e]); > > - free(entlist); > > return 0; > > } > > > > -- > > 2.32.0 > >