From: Stephane Eranian Date: Tue, 1 Jun 2010 19:25:01 +0000 (+0200) Subject: perf buildid: add perfconfig option to specify buildid cache dir X-Git-Tag: firefly_0821_release~9833^2~776^2~96^2~4 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=45de34bbe3e1;p=firefly-linux-kernel-4.4.55.git perf buildid: add perfconfig option to specify buildid cache dir This patch adds the ability to specify an alternate directory to store the buildid cache (buildids, copy of binaries). By default, it is hardcoded to $HOME/.debug. This directory contains immutable data. The layout of the directory is such that no conflicts in filenames are possible. A modification in a file, yields a different buildid and thus a different location in the subdir hierarchy. You may want to put the buildid cache elsewhere because of disk space limitation or simply to share the cache between users. It is also useful for remote collect vs. local analysis of profiles. This patch adds a new config option to the perfconfig file. Under the tag 'buildid', there is a dir option. For instance, if you have: $ cat /etc/perfconfig [buildid] dir = /var/cache/perf-buildid All buildids and binaries are be saved in the directory specified. The perf record, buildid-list, buildid-cache, report, annotate, and archive commands will it to pull information out. The option can be set in the system-wide perfconfig file or in the $HOME/.perfconfig file. Cc: David S. Miller Cc: Frédéric Weisbecker Cc: Ingo Molnar Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Stephane Eranian Cc: Tom Zanussi LKML-Reference: <4c055fb7.df0ce30a.5f0d.ffffae52@mx.google.com> Signed-off-by: Stephane Eranian Signed-off-by: Arnaldo Carvalho de Melo --- diff --git a/tools/perf/builtin-buildid-cache.c b/tools/perf/builtin-buildid-cache.c index f8e3d1852029..29ad20e67919 100644 --- a/tools/perf/builtin-buildid-cache.c +++ b/tools/perf/builtin-buildid-cache.c @@ -78,8 +78,7 @@ static int __cmd_buildid_cache(void) struct str_node *pos; char debugdir[PATH_MAX]; - snprintf(debugdir, sizeof(debugdir), "%s/%s", getenv("HOME"), - DEBUG_CACHE_DIR); + snprintf(debugdir, sizeof(debugdir), "%s", buildid_dir); if (add_name_list_str) { list = strlist__new(true, add_name_list_str); diff --git a/tools/perf/perf-archive.sh b/tools/perf/perf-archive.sh index 2e7a4f417e20..677e59d62a8d 100644 --- a/tools/perf/perf-archive.sh +++ b/tools/perf/perf-archive.sh @@ -7,7 +7,17 @@ if [ $# -ne 0 ] ; then PERF_DATA=$1 fi -DEBUGDIR=~/.debug/ +# +# PERF_BUILDID_DIR environment variable set by perf +# path to buildid directory, default to $HOME/.debug +# +if [ -z $PERF_BUILDID_DIR ]; then + PERF_BUILDID_DIR=~/.debug/ +else + # append / to make substitutions work + PERF_BUILDID_DIR=$PERF_BUILDID_DIR/ +fi + BUILDIDS=$(mktemp /tmp/perf-archive-buildids.XXXXXX) NOBUILDID=0000000000000000000000000000000000000000 @@ -22,13 +32,13 @@ MANIFEST=$(mktemp /tmp/perf-archive-manifest.XXXXXX) cut -d ' ' -f 1 $BUILDIDS | \ while read build_id ; do - linkname=$DEBUGDIR.build-id/${build_id:0:2}/${build_id:2} + linkname=$PERF_BUILDID_DIR.build-id/${build_id:0:2}/${build_id:2} filename=$(readlink -f $linkname) - echo ${linkname#$DEBUGDIR} >> $MANIFEST - echo ${filename#$DEBUGDIR} >> $MANIFEST + echo ${linkname#$PERF_BUILDID_DIR} >> $MANIFEST + echo ${filename#$PERF_BUILDID_DIR} >> $MANIFEST done -tar cfj $PERF_DATA.tar.bz2 -C $DEBUGDIR -T $MANIFEST +tar cfj $PERF_DATA.tar.bz2 -C $PERF_BUILDID_DIR -T $MANIFEST rm -f $MANIFEST $BUILDIDS echo -e "Now please run:\n" echo -e "$ tar xvf $PERF_DATA.tar.bz2 -C ~/.debug\n" diff --git a/tools/perf/perf.c b/tools/perf/perf.c index 6e4871191138..cdd6c03f1e14 100644 --- a/tools/perf/perf.c +++ b/tools/perf/perf.c @@ -458,6 +458,8 @@ int main(int argc, const char **argv) handle_options(&argv, &argc, NULL); commit_pager_choice(); set_debugfs_path(); + set_buildid_dir(); + if (argc > 0) { if (!prefixcmp(argv[0], "--")) argv[0] += 2; diff --git a/tools/perf/util/build-id.c b/tools/perf/util/build-id.c index 70c5cf87d020..5c26e2d314af 100644 --- a/tools/perf/util/build-id.c +++ b/tools/perf/util/build-id.c @@ -43,19 +43,17 @@ struct perf_event_ops build_id__mark_dso_hit_ops = { char *dso__build_id_filename(struct dso *self, char *bf, size_t size) { char build_id_hex[BUILD_ID_SIZE * 2 + 1]; - const char *home; if (!self->has_build_id) return NULL; build_id__sprintf(self->build_id, sizeof(self->build_id), build_id_hex); - home = getenv("HOME"); if (bf == NULL) { - if (asprintf(&bf, "%s/%s/.build-id/%.2s/%s", home, - DEBUG_CACHE_DIR, build_id_hex, build_id_hex + 2) < 0) + if (asprintf(&bf, "%s/.build-id/%.2s/%s", buildid_dir, + build_id_hex, build_id_hex + 2) < 0) return NULL; } else - snprintf(bf, size, "%s/%s/.build-id/%.2s/%s", home, - DEBUG_CACHE_DIR, build_id_hex, build_id_hex + 2); + snprintf(bf, size, "%s/.build-id/%.2s/%s", buildid_dir, + build_id_hex, build_id_hex + 2); return bf; } diff --git a/tools/perf/util/cache.h b/tools/perf/util/cache.h index 65fe664fddf6..27e9ebe4076e 100644 --- a/tools/perf/util/cache.h +++ b/tools/perf/util/cache.h @@ -23,6 +23,7 @@ extern int perf_config(config_fn_t fn, void *); extern int perf_config_int(const char *, const char *); extern int perf_config_bool(const char *, const char *); extern int config_error_nonbool(const char *); +extern const char *perf_config_dirname(const char *, const char *); /* pager.c */ extern void setup_pager(void); diff --git a/tools/perf/util/config.c b/tools/perf/util/config.c index dabe892d0e53..e02d78cae70f 100644 --- a/tools/perf/util/config.c +++ b/tools/perf/util/config.c @@ -11,6 +11,11 @@ #define MAXNAME (256) +#define DEBUG_CACHE_DIR ".debug" + + +char buildid_dir[MAXPATHLEN]; /* root dir for buildid, binary cache */ + static FILE *config_file; static const char *config_file_name; static int config_linenr; @@ -127,7 +132,7 @@ static int get_value(config_fn_t fn, void *data, char *name, unsigned int len) break; if (!iskeychar(c)) break; - name[len++] = tolower(c); + name[len++] = c; if (len >= MAXNAME) return -1; } @@ -327,6 +332,13 @@ int perf_config_bool(const char *name, const char *value) return !!perf_config_bool_or_int(name, value, &discard); } +const char *perf_config_dirname(const char *name, const char *value) +{ + if (!name) + return NULL; + return value; +} + static int perf_default_core_config(const char *var __used, const char *value __used) { /* Add other config variables here and to Documentation/config.txt. */ @@ -428,3 +440,53 @@ int config_error_nonbool(const char *var) { return error("Missing value for '%s'", var); } + +struct buildid_dir_config { + char *dir; +}; + +static int buildid_dir_command_config(const char *var, const char *value, + void *data) +{ + struct buildid_dir_config *c = data; + const char *v; + + /* same dir for all commands */ + if (!prefixcmp(var, "buildid.") && !strcmp(var + 8, "dir")) { + v = perf_config_dirname(var, value); + if (!v) + return -1; + strncpy(c->dir, v, MAXPATHLEN-1); + c->dir[MAXPATHLEN-1] = '\0'; + } + return 0; +} + +static void check_buildid_dir_config(void) +{ + struct buildid_dir_config c; + c.dir = buildid_dir; + perf_config(buildid_dir_command_config, &c); +} + +void set_buildid_dir(void) +{ + buildid_dir[0] = '\0'; + + /* try config file */ + check_buildid_dir_config(); + + /* default to $HOME/.debug */ + if (buildid_dir[0] == '\0') { + char *v = getenv("HOME"); + if (v) { + snprintf(buildid_dir, MAXPATHLEN-1, "%s/%s", + v, DEBUG_CACHE_DIR); + } else { + strncpy(buildid_dir, DEBUG_CACHE_DIR, MAXPATHLEN-1); + } + buildid_dir[MAXPATHLEN-1] = '\0'; + } + /* for communicating with external commands */ + setenv("PERF_BUILDID_DIR", buildid_dir, 1); +} diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c index 1f62435f96c2..4a6a4b3a4ab7 100644 --- a/tools/perf/util/header.c +++ b/tools/perf/util/header.c @@ -385,8 +385,7 @@ static int perf_session__cache_build_ids(struct perf_session *self) int ret; char debugdir[PATH_MAX]; - snprintf(debugdir, sizeof(debugdir), "%s/%s", getenv("HOME"), - DEBUG_CACHE_DIR); + snprintf(debugdir, sizeof(debugdir), "%s", buildid_dir); if (mkdir(debugdir, 0755) != 0 && errno != EEXIST) return -1; diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h index 5e02d2c17154..34760a2fc606 100644 --- a/tools/perf/util/symbol.h +++ b/tools/perf/util/symbol.h @@ -9,8 +9,6 @@ #include #include -#define DEBUG_CACHE_DIR ".debug" - #ifdef HAVE_CPLUS_DEMANGLE extern char *cplus_demangle(const char *, int); diff --git a/tools/perf/util/util.h b/tools/perf/util/util.h index 4e8b6b0c551c..de61441b6dd7 100644 --- a/tools/perf/util/util.h +++ b/tools/perf/util/util.h @@ -89,6 +89,7 @@ extern const char *graph_line; extern const char *graph_dotted_line; +extern char buildid_dir[]; /* On most systems would have given us this, but * not on some systems (e.g. GNU/Hurd). @@ -152,6 +153,7 @@ extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2))) extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN); extern int prefixcmp(const char *str, const char *prefix); +extern void set_buildid_dir(void); static inline const char *skip_prefix(const char *str, const char *prefix) {