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 <davem@davemloft.net> Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <4c055fb7.df0ce30a.5f0d.ffffae52@mx.google.com> Signed-off-by: Stephane Eranian <eranian@google.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
parent
8e5564e6c7
commit
45de34bbe3
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@ -78,8 +78,7 @@ static int __cmd_buildid_cache(void)
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struct str_node *pos;
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struct str_node *pos;
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char debugdir[PATH_MAX];
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char debugdir[PATH_MAX];
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snprintf(debugdir, sizeof(debugdir), "%s/%s", getenv("HOME"),
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snprintf(debugdir, sizeof(debugdir), "%s", buildid_dir);
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DEBUG_CACHE_DIR);
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if (add_name_list_str) {
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if (add_name_list_str) {
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list = strlist__new(true, add_name_list_str);
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list = strlist__new(true, add_name_list_str);
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@ -7,7 +7,17 @@ if [ $# -ne 0 ] ; then
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PERF_DATA=$1
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PERF_DATA=$1
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fi
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fi
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DEBUGDIR=~/.debug/
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#
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# PERF_BUILDID_DIR environment variable set by perf
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# path to buildid directory, default to $HOME/.debug
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#
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if [ -z $PERF_BUILDID_DIR ]; then
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PERF_BUILDID_DIR=~/.debug/
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else
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# append / to make substitutions work
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PERF_BUILDID_DIR=$PERF_BUILDID_DIR/
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fi
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BUILDIDS=$(mktemp /tmp/perf-archive-buildids.XXXXXX)
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BUILDIDS=$(mktemp /tmp/perf-archive-buildids.XXXXXX)
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NOBUILDID=0000000000000000000000000000000000000000
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NOBUILDID=0000000000000000000000000000000000000000
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@ -22,13 +32,13 @@ MANIFEST=$(mktemp /tmp/perf-archive-manifest.XXXXXX)
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cut -d ' ' -f 1 $BUILDIDS | \
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cut -d ' ' -f 1 $BUILDIDS | \
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while read build_id ; do
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while read build_id ; do
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linkname=$DEBUGDIR.build-id/${build_id:0:2}/${build_id:2}
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linkname=$PERF_BUILDID_DIR.build-id/${build_id:0:2}/${build_id:2}
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filename=$(readlink -f $linkname)
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filename=$(readlink -f $linkname)
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echo ${linkname#$DEBUGDIR} >> $MANIFEST
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echo ${linkname#$PERF_BUILDID_DIR} >> $MANIFEST
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echo ${filename#$DEBUGDIR} >> $MANIFEST
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echo ${filename#$PERF_BUILDID_DIR} >> $MANIFEST
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done
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done
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tar cfj $PERF_DATA.tar.bz2 -C $DEBUGDIR -T $MANIFEST
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tar cfj $PERF_DATA.tar.bz2 -C $PERF_BUILDID_DIR -T $MANIFEST
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rm -f $MANIFEST $BUILDIDS
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rm -f $MANIFEST $BUILDIDS
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echo -e "Now please run:\n"
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echo -e "Now please run:\n"
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echo -e "$ tar xvf $PERF_DATA.tar.bz2 -C ~/.debug\n"
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echo -e "$ tar xvf $PERF_DATA.tar.bz2 -C ~/.debug\n"
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@ -458,6 +458,8 @@ int main(int argc, const char **argv)
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handle_options(&argv, &argc, NULL);
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handle_options(&argv, &argc, NULL);
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commit_pager_choice();
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commit_pager_choice();
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set_debugfs_path();
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set_debugfs_path();
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set_buildid_dir();
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if (argc > 0) {
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if (argc > 0) {
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if (!prefixcmp(argv[0], "--"))
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if (!prefixcmp(argv[0], "--"))
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argv[0] += 2;
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argv[0] += 2;
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@ -43,19 +43,17 @@ struct perf_event_ops build_id__mark_dso_hit_ops = {
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char *dso__build_id_filename(struct dso *self, char *bf, size_t size)
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char *dso__build_id_filename(struct dso *self, char *bf, size_t size)
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{
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{
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char build_id_hex[BUILD_ID_SIZE * 2 + 1];
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char build_id_hex[BUILD_ID_SIZE * 2 + 1];
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const char *home;
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if (!self->has_build_id)
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if (!self->has_build_id)
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return NULL;
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return NULL;
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build_id__sprintf(self->build_id, sizeof(self->build_id), build_id_hex);
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build_id__sprintf(self->build_id, sizeof(self->build_id), build_id_hex);
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home = getenv("HOME");
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if (bf == NULL) {
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if (bf == NULL) {
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if (asprintf(&bf, "%s/%s/.build-id/%.2s/%s", home,
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if (asprintf(&bf, "%s/.build-id/%.2s/%s", buildid_dir,
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DEBUG_CACHE_DIR, build_id_hex, build_id_hex + 2) < 0)
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build_id_hex, build_id_hex + 2) < 0)
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return NULL;
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return NULL;
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} else
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} else
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snprintf(bf, size, "%s/%s/.build-id/%.2s/%s", home,
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snprintf(bf, size, "%s/.build-id/%.2s/%s", buildid_dir,
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DEBUG_CACHE_DIR, build_id_hex, build_id_hex + 2);
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build_id_hex, build_id_hex + 2);
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return bf;
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return bf;
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}
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}
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@ -23,6 +23,7 @@ extern int perf_config(config_fn_t fn, void *);
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extern int perf_config_int(const char *, const char *);
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extern int perf_config_int(const char *, const char *);
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extern int perf_config_bool(const char *, const char *);
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extern int perf_config_bool(const char *, const char *);
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extern int config_error_nonbool(const char *);
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extern int config_error_nonbool(const char *);
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extern const char *perf_config_dirname(const char *, const char *);
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/* pager.c */
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/* pager.c */
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extern void setup_pager(void);
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extern void setup_pager(void);
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@ -11,6 +11,11 @@
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#define MAXNAME (256)
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#define MAXNAME (256)
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#define DEBUG_CACHE_DIR ".debug"
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char buildid_dir[MAXPATHLEN]; /* root dir for buildid, binary cache */
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static FILE *config_file;
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static FILE *config_file;
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static const char *config_file_name;
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static const char *config_file_name;
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static int config_linenr;
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static int config_linenr;
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@ -127,7 +132,7 @@ static int get_value(config_fn_t fn, void *data, char *name, unsigned int len)
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break;
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break;
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if (!iskeychar(c))
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if (!iskeychar(c))
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break;
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break;
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name[len++] = tolower(c);
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name[len++] = c;
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if (len >= MAXNAME)
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if (len >= MAXNAME)
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return -1;
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return -1;
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}
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}
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@ -327,6 +332,13 @@ int perf_config_bool(const char *name, const char *value)
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return !!perf_config_bool_or_int(name, value, &discard);
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return !!perf_config_bool_or_int(name, value, &discard);
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}
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}
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const char *perf_config_dirname(const char *name, const char *value)
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{
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if (!name)
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return NULL;
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return value;
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}
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static int perf_default_core_config(const char *var __used, const char *value __used)
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static int perf_default_core_config(const char *var __used, const char *value __used)
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{
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{
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/* Add other config variables here and to Documentation/config.txt. */
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/* Add other config variables here and to Documentation/config.txt. */
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@ -428,3 +440,53 @@ int config_error_nonbool(const char *var)
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{
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{
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return error("Missing value for '%s'", var);
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return error("Missing value for '%s'", var);
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}
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}
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struct buildid_dir_config {
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char *dir;
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};
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static int buildid_dir_command_config(const char *var, const char *value,
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void *data)
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{
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struct buildid_dir_config *c = data;
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const char *v;
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/* same dir for all commands */
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if (!prefixcmp(var, "buildid.") && !strcmp(var + 8, "dir")) {
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v = perf_config_dirname(var, value);
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if (!v)
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return -1;
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strncpy(c->dir, v, MAXPATHLEN-1);
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c->dir[MAXPATHLEN-1] = '\0';
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}
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return 0;
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}
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static void check_buildid_dir_config(void)
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{
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struct buildid_dir_config c;
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c.dir = buildid_dir;
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perf_config(buildid_dir_command_config, &c);
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}
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void set_buildid_dir(void)
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{
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buildid_dir[0] = '\0';
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/* try config file */
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check_buildid_dir_config();
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/* default to $HOME/.debug */
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if (buildid_dir[0] == '\0') {
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char *v = getenv("HOME");
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if (v) {
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snprintf(buildid_dir, MAXPATHLEN-1, "%s/%s",
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v, DEBUG_CACHE_DIR);
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} else {
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strncpy(buildid_dir, DEBUG_CACHE_DIR, MAXPATHLEN-1);
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}
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buildid_dir[MAXPATHLEN-1] = '\0';
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}
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/* for communicating with external commands */
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setenv("PERF_BUILDID_DIR", buildid_dir, 1);
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}
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@ -385,8 +385,7 @@ static int perf_session__cache_build_ids(struct perf_session *self)
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int ret;
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int ret;
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char debugdir[PATH_MAX];
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char debugdir[PATH_MAX];
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snprintf(debugdir, sizeof(debugdir), "%s/%s", getenv("HOME"),
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snprintf(debugdir, sizeof(debugdir), "%s", buildid_dir);
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DEBUG_CACHE_DIR);
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if (mkdir(debugdir, 0755) != 0 && errno != EEXIST)
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if (mkdir(debugdir, 0755) != 0 && errno != EEXIST)
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return -1;
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return -1;
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@ -9,8 +9,6 @@
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#include <linux/rbtree.h>
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#include <linux/rbtree.h>
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#include <stdio.h>
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#include <stdio.h>
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#define DEBUG_CACHE_DIR ".debug"
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#ifdef HAVE_CPLUS_DEMANGLE
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#ifdef HAVE_CPLUS_DEMANGLE
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extern char *cplus_demangle(const char *, int);
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extern char *cplus_demangle(const char *, int);
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extern const char *graph_line;
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extern const char *graph_line;
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extern const char *graph_dotted_line;
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extern const char *graph_dotted_line;
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extern char buildid_dir[];
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/* On most systems <limits.h> would have given us this, but
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/* On most systems <limits.h> would have given us this, but
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* not on some systems (e.g. GNU/Hurd).
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* not on some systems (e.g. GNU/Hurd).
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extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
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extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
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extern int prefixcmp(const char *str, const char *prefix);
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extern int prefixcmp(const char *str, const char *prefix);
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extern void set_buildid_dir(void);
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static inline const char *skip_prefix(const char *str, const char *prefix)
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static inline const char *skip_prefix(const char *str, const char *prefix)
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{
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{
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