23 files changed, 277 insertions, 144 deletions
diff --git a/tools/perf/Documentation/perf-diff.txt b/tools/perf/Documentation/perf-diff.txt
index 6a9ec2b35310..74d7481ed7a6 100644
--- a/tools/perf/Documentation/perf-diff.txt
+++ b/tools/perf/Documentation/perf-diff.txt
@@ -66,6 +66,8 @@ OPTIONS
 --force::
       Don't complain, do it.
+--symfs=<directory>::
+        Look for files with symbols relative to this directory.
 SEE ALSO
 --------
diff --git a/tools/perf/Documentation/perf-probe.txt b/tools/perf/Documentation/perf-probe.txt
index 4e2323276984..86b797a35aa6 100644
--- a/tools/perf/Documentation/perf-probe.txt
+++ b/tools/perf/Documentation/perf-probe.txt
@@ -117,7 +117,7 @@ LINE SYNTAX
 -----------
 Line range is described by following syntax.
- "FUNC[:RLN[+NUM|-RLN2]]|SRC:ALN[+NUM|-ALN2]"
+ "FUNC[:RLN[+NUM|-RLN2]]|SRC[:ALN[+NUM|-ALN2]]"
 FUNC specifies the function name of showing lines. 'RLN' is the start line
 number from function entry line, and 'RLN2' is the end line number. As same as
diff --git a/tools/perf/Documentation/perf-report.txt b/tools/perf/Documentation/perf-report.txt
index fefea77ec6e9..8ba03d6e5398 100644
--- a/tools/perf/Documentation/perf-report.txt
+++ b/tools/perf/Documentation/perf-report.txt
@@ -116,6 +116,9 @@ OPTIONS
 --force::
        Don't complain, do it.
+--symfs=<directory>::
+        Look for files with symbols relative to this directory.
 SEE ALSO
 --------
 linkperf:perf-stat[1]
diff --git a/tools/perf/Documentation/perf-timechart.txt b/tools/perf/Documentation/perf-timechart.txt
index 4b1788355eca..d7b79e2ba2ad 100644
--- a/tools/perf/Documentation/perf-timechart.txt
+++ b/tools/perf/Documentation/perf-timechart.txt
@@ -38,6 +38,8 @@ OPTIONS
 --process::
        Select the processes to display, by name or PID
+--symfs=<directory>::
+        Look for files with symbols relative to this directory.
 SEE ALSO
 --------
diff --git a/tools/perf/builtin-annotate.c b/tools/perf/builtin-annotate.c
index 569a2761b90a..c056cdc06912 100644
--- a/tools/perf/builtin-annotate.c
+++ b/tools/perf/builtin-annotate.c
@@ -375,6 +375,8 @@ static struct perf_event_ops event_ops = {
        .mmap   = event__process_mmap,
        .comm   = event__process_comm,
        .fork   = event__process_task,
+        .ordered_samples = true,
+        .ordering_requires_timestamps = true,
 };
 static int __cmd_annotate(void)
@@ -382,7 +384,7 @@ static int __cmd_annotate(void)
        int ret;
        struct perf_session *session;
-        session = perf_session__new(input_name, O_RDONLY, force, false);
+        session = perf_session__new(input_name, O_RDONLY, force, false, &event_ops);
        if (session == NULL)
                return -ENOMEM;
diff --git a/tools/perf/builtin-buildid-list.c b/tools/perf/builtin-buildid-list.c
index 44a47e13bd67..3b06f9ca2638 100644
--- a/tools/perf/builtin-buildid-list.c
+++ b/tools/perf/builtin-buildid-list.c
@@ -39,7 +39,8 @@ static int __cmd_buildid_list(void)
        int err = -1;
        struct perf_session *session;
-        session = perf_session__new(input_name, O_RDONLY, force, false);
+        session = perf_session__new(input_name, O_RDONLY, force, false,
+                                    &build_id__mark_dso_hit_ops);
        if (session == NULL)
                return -1;
diff --git a/tools/perf/builtin-diff.c b/tools/perf/builtin-diff.c
index 5e1a043aae03..3153e492dbcc 100644
--- a/tools/perf/builtin-diff.c
+++ b/tools/perf/builtin-diff.c
@@ -61,6 +61,8 @@ static struct perf_event_ops event_ops = {
        .exit   = event__process_task,
        .fork   = event__process_task,
        .lost   = event__process_lost,
+        .ordered_samples = true,
+        .ordering_requires_timestamps = true,
 };
 static void perf_session__insert_hist_entry_by_name(struct rb_root *root,
@@ -142,8 +144,8 @@ static int __cmd_diff(void)
        int ret, i;
        struct perf_session *session[2];
-        session[0] = perf_session__new(input_old, O_RDONLY, force, false);
+        session[0] = perf_session__new(input_old, O_RDONLY, force, false, &event_ops);
-        session[1] = perf_session__new(input_new, O_RDONLY, force, false);
+        session[1] = perf_session__new(input_new, O_RDONLY, force, false, &event_ops);
        if (session[0] == NULL || session[1] == NULL)
                return -ENOMEM;
@@ -192,6 +194,8 @@ static const struct option options[] = {
        OPT_STRING('t', "field-separator", &symbol_conf.field_sep, "separator",
                   "separator for columns, no spaces will be added between "
                   "columns '.' is reserved."),
+        OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory",
+                    "Look for files with symbols relative to this directory"),
        OPT_END()
 };
diff --git a/tools/perf/builtin-inject.c b/tools/perf/builtin-inject.c
index 4b66b8579410..0c78ffa7bf67 100644
--- a/tools/perf/builtin-inject.c
+++ b/tools/perf/builtin-inject.c
@@ -196,7 +196,7 @@ static int __cmd_inject(void)
                inject_ops.tracing_data = event__repipe_tracing_data;
        }
-        session = perf_session__new(input_name, O_RDONLY, false, true);
+        session = perf_session__new(input_name, O_RDONLY, false, true, &inject_ops);
        if (session == NULL)
                return -ENOMEM;
diff --git a/tools/perf/builtin-kmem.c b/tools/perf/builtin-kmem.c
index c9620ff6496f..def7ddc2fd4f 100644
--- a/tools/perf/builtin-kmem.c
+++ b/tools/perf/builtin-kmem.c
@@ -481,7 +481,8 @@ static void sort_result(void)
 static int __cmd_kmem(void)
 {
        int err = -EINVAL;
-        struct perf_session *session = perf_session__new(input_name, O_RDONLY, 0, false);
+        struct perf_session *session = perf_session__new(input_name, O_RDONLY,
+                                                         0, false, &event_ops);
        if (session == NULL)
                return -ENOMEM;
diff --git a/tools/perf/builtin-lock.c b/tools/perf/builtin-lock.c
index b41b4492b1cc..b9c6e5432971 100644
--- a/tools/perf/builtin-lock.c
+++ b/tools/perf/builtin-lock.c
@@ -858,7 +858,7 @@ static struct perf_event_ops eops = {
 static int read_events(void)
 {
-        session = perf_session__new(input_name, O_RDONLY, 0, false);
+        session = perf_session__new(input_name, O_RDONLY, 0, false, &eops);
        if (!session)
                die("Initializing perf session failed\n");
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index e9be6ae87a27..5149e3deb7bc 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -285,7 +285,7 @@ static void create_counter(int counter, int cpu)
        if (system_wide)
                attr->sample_type       |= PERF_SAMPLE_CPU;
-        if (sample_time)
+        if (sample_time || system_wide || !no_inherit || cpu_list)
                attr->sample_type       |= PERF_SAMPLE_TIME;
        if (raw_samples) {
@@ -327,6 +327,9 @@ try_again:
                                 * Old kernel, no attr->sample_id_type_all field
                                 */
                                sample_id_all_avail = false;
+                                if (!sample_time && !raw_samples)
+                                        attr->sample_type &= ~PERF_SAMPLE_TIME;
                                goto retry_sample_id;
                        }
@@ -572,7 +575,7 @@ static int __cmd_record(int argc, const char **argv)
        }
        session = perf_session__new(output_name, O_WRONLY,
-                                    write_mode == WRITE_FORCE, false);
+                                    write_mode == WRITE_FORCE, false, NULL);
        if (session == NULL) {
                pr_err("Not enough memory for reading perf file header\n");
                return -1;
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index b6a2a899aa8f..75183a4518e6 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -244,6 +244,8 @@ static struct perf_event_ops event_ops = {
        .event_type = event__process_event_type,
        .tracing_data = event__process_tracing_data,
        .build_id = event__process_build_id,
+        .ordered_samples = true,
+        .ordering_requires_timestamps = true,
 };
 extern volatile int session_done;
@@ -308,7 +310,7 @@ static int __cmd_report(void)
        signal(SIGINT, sig_handler);
-        session = perf_session__new(input_name, O_RDONLY, force, false);
+        session = perf_session__new(input_name, O_RDONLY, force, false, &event_ops);
        if (session == NULL)
                return -ENOMEM;
@@ -481,6 +483,8 @@ static const struct option options[] = {
                   "columns '.' is reserved."),
        OPT_BOOLEAN('U', "hide-unresolved", &hide_unresolved,
                    "Only display entries resolved to a symbol"),
+        OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory",
+                    "Look for files with symbols relative to this directory"),
        OPT_END()
 };
diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c
index c7753940aea0..7a4ebeb8b016 100644
--- a/tools/perf/builtin-sched.c
+++ b/tools/perf/builtin-sched.c
@@ -1643,7 +1643,8 @@ static struct perf_event_ops event_ops = {
 static int read_events(void)
 {
        int err = -EINVAL;
-        struct perf_session *session = perf_session__new(input_name, O_RDONLY, 0, false);
+        struct perf_session *session = perf_session__new(input_name, O_RDONLY,
+                                                         0, false, &event_ops);
        if (session == NULL)
                return -ENOMEM;
diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index 54f1ea808db5..6ef65c04ab9a 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -779,7 +779,7 @@ int cmd_script(int argc, const char **argv, const char *prefix __used)
        if (!script_name)
                setup_pager();
-        session = perf_session__new(input_name, O_RDONLY, 0, false);
+        session = perf_session__new(input_name, O_RDONLY, 0, false, &event_ops);
        if (session == NULL)
                return -ENOMEM;
diff --git a/tools/perf/builtin-timechart.c b/tools/perf/builtin-timechart.c
index d2fc46103f83..d75084bccdb7 100644
--- a/tools/perf/builtin-timechart.c
+++ b/tools/perf/builtin-timechart.c
@@ -937,7 +937,8 @@ static struct perf_event_ops event_ops = {
 static int __cmd_timechart(void)
 {
-        struct perf_session *session = perf_session__new(input_name, O_RDONLY, 0, false);
+        struct perf_session *session = perf_session__new(input_name, O_RDONLY,
+                                                         0, false, &event_ops);
        int ret = -EINVAL;
        if (session == NULL)
@@ -1021,6 +1022,8 @@ static const struct option options[] = {
        OPT_CALLBACK('p', "process", NULL, "process",
                      "process selector. Pass a pid or process name.",
                       parse_process),
+        OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory",
+                    "Look for files with symbols relative to this directory"),
        OPT_END()
 };
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 0515ce9d3d3e..ae15f046c405 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -1272,7 +1272,7 @@ static int __cmd_top(void)
         * FIXME: perf_session__new should allow passing a O_MMAP, so that all this
         * mmap reading, etc is encapsulated in it. Use O_WRONLY for now.
         */
-        struct perf_session *session = perf_session__new(NULL, O_WRONLY, false, false);
+        struct perf_session *session = perf_session__new(NULL, O_WRONLY, false, false, NULL);
        if (session == NULL)
                return -ENOMEM;
diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
index a3b84160c42e..d5036700a435 100644
--- a/tools/perf/util/hist.c
+++ b/tools/perf/util/hist.c
@@ -1092,6 +1092,12 @@ int hist_entry__annotate(struct hist_entry *self, struct list_head *head,
        FILE *file;
        int err = 0;
        u64 len;
+        char symfs_filename[PATH_MAX];
+        if (filename) {
+                snprintf(symfs_filename, sizeof(symfs_filename), "%s%s",
+                         symbol_conf.symfs, filename);
+        }
        if (filename == NULL) {
                if (dso->has_build_id) {
@@ -1100,9 +1106,9 @@ int hist_entry__annotate(struct hist_entry *self, struct list_head *head,
                        return -ENOMEM;
                }
                goto fallback;
-        } else if (readlink(filename, command, sizeof(command)) < 0 ||
+        } else if (readlink(symfs_filename, command, sizeof(command)) < 0 ||
                   strstr(command, "[kernel.kallsyms]") ||
-                   access(filename, R_OK)) {
+                   access(symfs_filename, R_OK)) {
                free(filename);
 fallback:
                /*
@@ -1111,6 +1117,8 @@ fallback:
                 * DSO is the same as when 'perf record' ran.
                 */
                filename = dso->long_name;
+                snprintf(symfs_filename, sizeof(symfs_filename), "%s%s",
+                         symbol_conf.symfs, filename);
                free_filename = false;
        }
@@ -1137,7 +1145,7 @@ fallback:
                 "objdump --start-address=0x%016Lx --stop-address=0x%016Lx -dS -C %s|grep -v %s|expand",
                 map__rip_2objdump(map, sym->start),
                 map__rip_2objdump(map, sym->end),
-                 filename, filename);
+                 symfs_filename, filename);
        pr_debug("Executing: %s\n", command);
diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index 3b6a5297bf16..099336ed34b4 100644
--- a/tools/perf/util/probe-event.c
+++ b/tools/perf/util/probe-event.c
@@ -95,7 +95,7 @@ static int init_vmlinux(void)
                goto out;
        if (machine__create_kernel_maps(&machine) < 0) {
-                pr_debug("machine__create_kernel_maps ");
+                pr_debug("machine__create_kernel_maps() failed.\n");
                goto out;
        }
 out:
@@ -140,7 +140,8 @@ static int open_vmlinux(const char *module)
 {
        const char *path = kernel_get_module_path(module);
        if (!path) {
-                pr_err("Failed to find path of %s module", module ?: "kernel");
+                pr_err("Failed to find path of %s module.\n",
+                       module ?: "kernel");
                return -ENOENT;
        }
        pr_debug("Try to open %s\n", path);
@@ -217,7 +218,7 @@ static int try_to_find_probe_trace_events(struct perf_probe_event *pev,
                pr_warning("Warning: No dwarf info found in the vmlinux - "
                        "please rebuild kernel with CONFIG_DEBUG_INFO=y.\n");
                if (!need_dwarf) {
-                        pr_debug("Trying to use symbols.\nn");
+                        pr_debug("Trying to use symbols.\n");
                        return 0;
                }
        }
@@ -286,42 +287,49 @@ static int get_real_path(const char *raw_path, const char *comp_dir,
 #define LINEBUF_SIZE 256
 #define NR_ADDITIONAL_LINES 2
-static int show_one_line(FILE *fp, int l, bool skip, bool show_num)
+static int __show_one_line(FILE *fp, int l, bool skip, bool show_num)
 {
        char buf[LINEBUF_SIZE];
-        const char *color = PERF_COLOR_BLUE;
+        const char *color = show_num ? "" : PERF_COLOR_BLUE;
+        const char *prefix = NULL;
-        if (fgets(buf, LINEBUF_SIZE, fp) == NULL)
+        do {
-                goto error;
-        if (!skip) {
-                if (show_num)
-                        fprintf(stdout, "%7d  %s", l, buf);
-                else
-                        color_fprintf(stdout, color, "         %s", buf);
-        }
-        while (strlen(buf) == LINEBUF_SIZE - 1 &&
-               buf[LINEBUF_SIZE - 2] != '\n') {
                if (fgets(buf, LINEBUF_SIZE, fp) == NULL)
                        goto error;
-                if (!skip) {
+                if (skip)
-                        if (show_num)
+                        continue;
-                                fprintf(stdout, "%s", buf);
+                if (!prefix) {
-                        else
+                        prefix = show_num ? "%7d  " : "         ";
-                                color_fprintf(stdout, color, "%s", buf);
+                        color_fprintf(stdout, color, prefix, l);
                }
-        }
+                color_fprintf(stdout, color, "%s", buf);
-        return 0;
+        } while (strchr(buf, '\n') == NULL);
+        return 1;
 error:
-        if (feof(fp))
+        if (ferror(fp)) {
                pr_warning("Source file is shorter than expected.\n");
-        else
+                return -1;
-                pr_warning("File read error: %s\n", strerror(errno));
+        }
+        return 0;
+}
-        return -1;
+static int _show_one_line(FILE *fp, int l, bool skip, bool show_num)
+{
+        int rv = __show_one_line(fp, l, skip, show_num);
+        if (rv == 0) {
+                pr_warning("Source file is shorter than expected.\n");
+                rv = -1;
+        }
+        return rv;
 }
+#define show_one_line_with_num(f,l)     _show_one_line(f,l,false,true)
+#define show_one_line(f,l)              _show_one_line(f,l,false,false)
+#define skip_one_line(f,l)              _show_one_line(f,l,true,false)
+#define show_one_line_or_eof(f,l)       __show_one_line(f,l,false,false)
 /*
 * Show line-range always requires debuginfo to find source file and
 * line number.
@@ -370,7 +378,7 @@ int show_line_range(struct line_range *lr, const char *module)
                fprintf(stdout, "<%s:%d>\n", lr->function,
                        lr->start - lr->offset);
        else
-                fprintf(stdout, "<%s:%d>\n", lr->file, lr->start);
+                fprintf(stdout, "<%s:%d>\n", lr->path, lr->start);
        fp = fopen(lr->path, "r");
        if (fp == NULL) {
@@ -379,26 +387,30 @@ int show_line_range(struct line_range *lr, const char *module)
                return -errno;
        }
        /* Skip to starting line number */
-        while (l < lr->start && ret >= 0)
+        while (l < lr->start) {
-                ret = show_one_line(fp, l++, true, false);
+                ret = skip_one_line(fp, l++);
-        if (ret < 0)
+                if (ret < 0)
-                goto end;
+                        goto end;
+        }
        list_for_each_entry(ln, &lr->line_list, list) {
-                while (ln->line > l && ret >= 0)
+                for (; ln->line > l; l++) {
-                        ret = show_one_line(fp, (l++) - lr->offset,
+                        ret = show_one_line(fp, l - lr->offset);
-                                            false, false);
+                        if (ret < 0)
-                if (ret >= 0)
+                                goto end;
-                        ret = show_one_line(fp, (l++) - lr->offset,
+                }
-                                            false, true);
+                ret = show_one_line_with_num(fp, l++ - lr->offset);
                if (ret < 0)
                        goto end;
        }
        if (lr->end == INT_MAX)
                lr->end = l + NR_ADDITIONAL_LINES;
-        while (l <= lr->end && !feof(fp) && ret >= 0)
+        while (l <= lr->end) {
-                ret = show_one_line(fp, (l++) - lr->offset, false, false);
+                ret = show_one_line_or_eof(fp, l++ - lr->offset);
+                if (ret <= 0)
+                        break;
+        }
 end:
        fclose(fp);
        return ret;
@@ -457,7 +469,7 @@ int show_available_vars(struct perf_probe_event *pevs, int npevs,
        fd = open_vmlinux(module);
        if (fd < 0) {
-                pr_warning("Failed to open debuginfo file.\n");
+                pr_warning("Failed to open debug information file.\n");
                return fd;
        }
@@ -517,56 +529,87 @@ int show_available_vars(struct perf_probe_event *pevs __unused,
 }
 #endif
+static int parse_line_num(char **ptr, int *val, const char *what)
+{
+        const char *start = *ptr;
+        errno = 0;
+        *val = strtol(*ptr, ptr, 0);
+        if (errno || *ptr == start) {
+                semantic_error("'%s' is not a valid number.\n", what);
+                return -EINVAL;
+        }
+        return 0;
+}
+/*
+ * Stuff 'lr' according to the line range described by 'arg'.
+ * The line range syntax is described by:
+ *
+ *         SRC[:SLN[+NUM|-ELN]]
+ *         FNC[:SLN[+NUM|-ELN]]
+ */
 int parse_line_range_desc(const char *arg, struct line_range *lr)
 {
-        const char *ptr;
+        char *range, *name = strdup(arg);
-        char *tmp;
+        int err;
-        /*
-         * <Syntax>
+        if (!name)
-         * SRC:SLN[+NUM|-ELN]
+                return -ENOMEM;
-         * FUNC[:SLN[+NUM|-ELN]]
-         */
+        lr->start = 0;
-        ptr = strchr(arg, ':');
+        lr->end = INT_MAX;
-        if (ptr) {
-                lr->start = (int)strtoul(ptr + 1, &tmp, 0);
+        range = strchr(name, ':');
-                if (*tmp == '+') {
+        if (range) {
-                        lr->end = lr->start + (int)strtoul(tmp + 1, &tmp, 0);
+                *range++ = '\0';
-                        lr->end--;      /*
-                                         * Adjust the number of lines here.
+                err = parse_line_num(&range, &lr->start, "start line");
-                                         * If the number of lines == 1, the
+                if (err)
-                                         * the end of line should be equal to
+                        goto err;
-                                         * the start of line.
-                                         */
+                if (*range == '+' || *range == '-') {
-                } else if (*tmp == '-')
+                        const char c = *range++;
-                        lr->end = (int)strtoul(tmp + 1, &tmp, 0);
-                else
+                        err = parse_line_num(&range, &lr->end, "end line");
-                        lr->end = INT_MAX;
+                        if (err)
+                                goto err;
+                        if (c == '+') {
+                                lr->end += lr->start;
+                                /*
+                                 * Adjust the number of lines here.
+                                 * If the number of lines == 1, the
+                                 * the end of line should be equal to
+                                 * the start of line.
+                                 */
+                                lr->end--;
+                        }
+                }
                pr_debug("Line range is %d to %d\n", lr->start, lr->end);
+                err = -EINVAL;
                if (lr->start > lr->end) {
                        semantic_error("Start line must be smaller"
                                       " than end line.\n");
-                        return -EINVAL;
+                        goto err;
                }
-                if (*tmp != '\0') {
+                if (*range != '\0') {
-                        semantic_error("Tailing with invalid character '%d'.\n",
+                        semantic_error("Tailing with invalid str '%s'.\n", range);
-                                       *tmp);
+                        goto err;
-                        return -EINVAL;
                }
-                tmp = strndup(arg, (ptr - arg));
-        } else {
-                tmp = strdup(arg);
-                lr->end = INT_MAX;
        }
-        if (tmp == NULL)
+        if (strchr(name, '.'))
-                return -ENOMEM;
+                lr->file = name;
-        if (strchr(tmp, '.'))
-                lr->file = tmp;
        else
-                lr->function = tmp;
+                lr->function = name;
        return 0;
+err:
+        free(name);
+        return err;
 }
 /* Check the name is good for event/group */
@@ -690,39 +733,40 @@ static int parse_perf_probe_point(char *arg, struct perf_probe_event *pev)
        /* Exclusion check */
        if (pp->lazy_line && pp->line) {
-                semantic_error("Lazy pattern can't be used with line number.");
+                semantic_error("Lazy pattern can't be used with"
+                               " line number.\n");
                return -EINVAL;
        }
        if (pp->lazy_line && pp->offset) {
-                semantic_error("Lazy pattern can't be used with offset.");
+                semantic_error("Lazy pattern can't be used with offset.\n");
                return -EINVAL;
        }
        if (pp->line && pp->offset) {
-                semantic_error("Offset can't be used with line number.");
+                semantic_error("Offset can't be used with line number.\n");
                return -EINVAL;
        }
        if (!pp->line && !pp->lazy_line && pp->file && !pp->function) {
                semantic_error("File always requires line number or "
-                               "lazy pattern.");
+                               "lazy pattern.\n");
                return -EINVAL;
        }
        if (pp->offset && !pp->function) {
-                semantic_error("Offset requires an entry function.");
+                semantic_error("Offset requires an entry function.\n");
                return -EINVAL;
        }
        if (pp->retprobe && !pp->function) {
-                semantic_error("Return probe requires an entry function.");
+                semantic_error("Return probe requires an entry function.\n");
                return -EINVAL;
        }
        if ((pp->offset || pp->line || pp->lazy_line) && pp->retprobe) {
                semantic_error("Offset/Line/Lazy pattern can't be used with "
-                               "return probe.");
+                               "return probe.\n");
                return -EINVAL;
        }
@@ -996,7 +1040,7 @@ int synthesize_perf_probe_arg(struct perf_probe_arg *pa, char *buf, size_t len)
        return tmp - buf;
 error:
-        pr_debug("Failed to synthesize perf probe argument: %s",
+        pr_debug("Failed to synthesize perf probe argument: %s\n",
                 strerror(-ret));
        return ret;
 }
@@ -1046,7 +1090,7 @@ static char *synthesize_perf_probe_point(struct perf_probe_point *pp)
        return buf;
 error:
-        pr_debug("Failed to synthesize perf probe point: %s",
+        pr_debug("Failed to synthesize perf probe point: %s\n",
                 strerror(-ret));
        if (buf)
                free(buf);
@@ -1787,7 +1831,7 @@ static int del_trace_probe_event(int fd, const char *group,
        ret = e_snprintf(buf, 128, "%s:%s", group, event);
        if (ret < 0) {
-                pr_err("Failed to copy event.");
+                pr_err("Failed to copy event.\n");
                return ret;
        }
diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c
index 3991d73d1cff..90b629226bd7 100644
--- a/tools/perf/util/probe-finder.c
+++ b/tools/perf/util/probe-finder.c
@@ -627,8 +627,8 @@ static_var:
        regs = get_arch_regstr(regn);
        if (!regs) {
                /* This should be a bug in DWARF or this tool */
-                pr_warning("Mapping for DWARF register number %u "
+                pr_warning("Mapping for the register number %u "
-                           "missing on this architecture.", regn);
+                           "missing on this architecture.\n", regn);
                return -ERANGE;
        }
@@ -674,13 +674,14 @@ static int convert_variable_type(Dwarf_Die *vr_die,
                if (ret != DW_TAG_pointer_type &&
                    ret != DW_TAG_array_type) {
                        pr_warning("Failed to cast into string: "
-                                   "%s(%s) is not a pointer nor array.",
+                                   "%s(%s) is not a pointer nor array.\n",
                                   dwarf_diename(vr_die), dwarf_diename(&type));
                        return -EINVAL;
                }
                if (ret == DW_TAG_pointer_type) {
                        if (die_get_real_type(&type, &type) == NULL) {
-                                pr_warning("Failed to get a type information.");
+                                pr_warning("Failed to get a type"
+                                           " information.\n");
                                return -ENOENT;
                        }
                        while (*ref_ptr)
@@ -695,7 +696,7 @@ static int convert_variable_type(Dwarf_Die *vr_die,
                if (!die_compare_name(&type, "char") &&
                    !die_compare_name(&type, "unsigned char")) {
                        pr_warning("Failed to cast into string: "
-                                   "%s is not (unsigned) char *.",
+                                   "%s is not (unsigned) char *.\n",
                                   dwarf_diename(vr_die));
                        return -EINVAL;
                }
@@ -805,8 +806,8 @@ static int convert_variable_fields(Dwarf_Die *vr_die, const char *varname,
                        return -EINVAL;
                }
                if (field->name[0] == '[') {
-                        pr_err("Semantic error: %s is not a pointor nor array.",
+                        pr_err("Semantic error: %s is not a pointor"
-                               varname);
+                               " nor array.\n", varname);
                        return -EINVAL;
                }
                if (field->ref) {
@@ -953,7 +954,7 @@ static int convert_to_trace_point(Dwarf_Die *sp_die, Dwarf_Addr paddr,
        name = dwarf_diename(sp_die);
        if (name) {
                if (dwarf_entrypc(sp_die, &eaddr) != 0) {
-                        pr_warning("Failed to get entry pc of %s\n",
+                        pr_warning("Failed to get entry address of %s\n",
                                   dwarf_diename(sp_die));
                        return -ENOENT;
                }
@@ -969,7 +970,7 @@ static int convert_to_trace_point(Dwarf_Die *sp_die, Dwarf_Addr paddr,
        if (retprobe) {
                if (eaddr != paddr) {
                        pr_warning("Return probe must be on the head of"
-                                   " a real function\n");
+                                   " a real function.\n");
                        return -EINVAL;
                }
                tp->retprobe = true;
@@ -1008,7 +1009,7 @@ static int call_probe_finder(Dwarf_Die *sp_die, struct probe_finder *pf)
                Dwarf_Frame *frame;
                if (dwarf_cfi_addrframe(pf->cfi, pf->addr, &frame) != 0 ||
                    dwarf_frame_cfa(frame, &pf->fb_ops, &nops) != 0) {
-                        pr_warning("Failed to get CFA on 0x%jx\n",
+                        pr_warning("Failed to get call frame on 0x%jx\n",
                                   (uintmax_t)pf->addr);
                        return -ENOENT;
                }
@@ -1035,7 +1036,7 @@ static int find_probe_point_by_line(struct probe_finder *pf)
        int ret = 0;
        if (dwarf_getsrclines(&pf->cu_die, &lines, &nlines) != 0) {
-                pr_warning("No source lines found in this CU.\n");
+                pr_warning("No source lines found.\n");
                return -ENOENT;
        }
@@ -1137,7 +1138,7 @@ static int find_probe_point_lazy(Dwarf_Die *sp_die, struct probe_finder *pf)
        }
        if (dwarf_getsrclines(&pf->cu_die, &lines, &nlines) != 0) {
-                pr_warning("No source lines found in this CU.\n");
+                pr_warning("No source lines found.\n");
                return -ENOENT;
        }
@@ -1195,7 +1196,7 @@ static int probe_point_inline_cb(Dwarf_Die *in_die, void *data)
        else {
                /* Get probe address */
                if (dwarf_entrypc(in_die, &addr) != 0) {
-                        pr_warning("Failed to get entry pc of %s.\n",
+                        pr_warning("Failed to get entry address of %s.\n",
                                   dwarf_diename(in_die));
                        param->retval = -ENOENT;
                        return DWARF_CB_ABORT;
@@ -1236,8 +1237,8 @@ static int probe_point_search_cb(Dwarf_Die *sp_die, void *data)
                        param->retval = find_probe_point_lazy(sp_die, pf);
                else {
                        if (dwarf_entrypc(sp_die, &pf->addr) != 0) {
-                                pr_warning("Failed to get entry pc of %s.\n",
+                                pr_warning("Failed to get entry address of "
-                                           dwarf_diename(sp_die));
+                                           "%s.\n", dwarf_diename(sp_die));
                                param->retval = -ENOENT;
                                return DWARF_CB_ABORT;
                        }
@@ -1279,7 +1280,7 @@ static int find_probes(int fd, struct probe_finder *pf)
        dbg = dwfl_init_offline_dwarf(fd, &dwfl, &bias);
        if (!dbg) {
-                pr_warning("No dwarf info found in the vmlinux - "
+                pr_warning("No debug information found in the vmlinux - "
                        "please rebuild with CONFIG_DEBUG_INFO=y.\n");
                return -EBADF;
        }
@@ -1524,7 +1525,7 @@ int find_perf_probe_point(unsigned long addr, struct perf_probe_point *ppt)
        /* Open the live linux kernel */
        dbg = dwfl_init_live_kernel_dwarf(addr, &dwfl, &bias);
        if (!dbg) {
-                pr_warning("No dwarf info found in the vmlinux - "
+                pr_warning("No debug information found in the vmlinux - "
                        "please rebuild with CONFIG_DEBUG_INFO=y.\n");
                ret = -EINVAL;
                goto end;
@@ -1534,7 +1535,8 @@ int find_perf_probe_point(unsigned long addr, struct perf_probe_point *ppt)
        addr += bias;
        /* Find cu die */
        if (!dwarf_addrdie(dbg, (Dwarf_Addr)addr - bias, &cudie)) {
-                pr_warning("No CU DIE is found at %lx\n", addr);
+                pr_warning("Failed to find debug information for address %lx\n",
+                           addr);
                ret = -EINVAL;
                goto end;
        }
@@ -1659,7 +1661,7 @@ static int find_line_range_by_line(Dwarf_Die *sp_die, struct line_finder *lf)
        line_list__init(&lf->lr->line_list);
        if (dwarf_getsrclines(&lf->cu_die, &lines, &nlines) != 0) {
-                pr_warning("No source lines found in this CU.\n");
+                pr_warning("No source lines found.\n");
                return -ENOENT;
        }
@@ -1784,7 +1786,7 @@ int find_line_range(int fd, struct line_range *lr)
        dbg = dwfl_init_offline_dwarf(fd, &dwfl, &bias);
        if (!dbg) {
-                pr_warning("No dwarf info found in the vmlinux - "
+                pr_warning("No debug information found in the vmlinux - "
                        "please rebuild with CONFIG_DEBUG_INFO=y.\n");
                return -EBADF;
        }
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index b59abf5aba36..0f7e544544f5 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -125,7 +125,9 @@ static void perf_session__destroy_kernel_maps(struct perf_session *self)
        machines__destroy_guest_kernel_maps(&self->machines);
 }
-struct perf_session *perf_session__new(const char *filename, int mode, bool force, bool repipe)
+struct perf_session *perf_session__new(const char *filename, int mode,
+                                       bool force, bool repipe,
+                                       struct perf_event_ops *ops)
 {
        size_t len = filename ? strlen(filename) + 1 : 0;
        struct perf_session *self = zalloc(sizeof(*self) + len);
@@ -170,6 +172,13 @@ struct perf_session *perf_session__new(const char *filename, int mode, bool forc
        }
        perf_session__update_sample_type(self);
+        if (ops && ops->ordering_requires_timestamps &&
+            ops->ordered_samples && !self->sample_id_all) {
+                dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n");
+                ops->ordered_samples = false;
+        }
 out:
        return self;
 out_free:
diff --git a/tools/perf/util/session.h b/tools/perf/util/session.h
index ac36f99f14af..ffe4b98db8f0 100644
--- a/tools/perf/util/session.h
+++ b/tools/perf/util/session.h
@@ -78,9 +78,12 @@ struct perf_event_ops {
                        build_id;
        event_op2       finished_round;
        bool            ordered_samples;
+        bool            ordering_requires_timestamps;
 };
-struct perf_session *perf_session__new(const char *filename, int mode, bool force, bool repipe);
+struct perf_session *perf_session__new(const char *filename, int mode,
+                                       bool force, bool repipe,
+                                       struct perf_event_ops *ops);
 void perf_session__delete(struct perf_session *self);
 void perf_event_header__bswap(struct perf_event_header *self);
diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index ceefa6568def..561db6361f57 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -41,6 +41,7 @@ struct symbol_conf symbol_conf = {
        .exclude_other    = true,
        .use_modules      = true,
        .try_vmlinux_path = true,
+        .symfs            = "",
 };
 int dso__name_len(const struct dso *self)
@@ -839,8 +840,11 @@ static int dso__synthesize_plt_symbols(struct  dso *self, struct map *map,
        char sympltname[1024];
        Elf *elf;
        int nr = 0, symidx, fd, err = 0;
+        char name[PATH_MAX];
-        fd = open(self->long_name, O_RDONLY);
+        snprintf(name, sizeof(name), "%s%s",
+                 symbol_conf.symfs, self->long_name);
+        fd = open(name, O_RDONLY);
        if (fd < 0)
                goto out;
@@ -1452,16 +1456,19 @@ int dso__load(struct dso *self, struct map *map, symbol_filter_t filter)
             self->origin++) {
                switch (self->origin) {
                case DSO__ORIG_BUILD_ID_CACHE:
-                        if (dso__build_id_filename(self, name, size) == NULL)
+                        /* skip the locally configured cache if a symfs is given */
+                        if (symbol_conf.symfs[0] ||
+                            (dso__build_id_filename(self, name, size) == NULL)) {
                                continue;
+                        }
                        break;
                case DSO__ORIG_FEDORA:
-                        snprintf(name, size, "/usr/lib/debug%s.debug",
+                        snprintf(name, size, "%s/usr/lib/debug%s.debug",
-                                 self->long_name);
+                                 symbol_conf.symfs, self->long_name);
                        break;
                case DSO__ORIG_UBUNTU:
-                        snprintf(name, size, "/usr/lib/debug%s",
+                        snprintf(name, size, "%s/usr/lib/debug%s",
-                                 self->long_name);
+                                 symbol_conf.symfs, self->long_name);
                        break;
                case DSO__ORIG_BUILDID: {
                        char build_id_hex[BUILD_ID_SIZE * 2 + 1];
@@ -1473,19 +1480,26 @@ int dso__load(struct dso *self, struct map *map, symbol_filter_t filter)
                                          sizeof(self->build_id),
                                          build_id_hex);
                        snprintf(name, size,
-                                 "/usr/lib/debug/.build-id/%.2s/%s.debug",
+                                 "%s/usr/lib/debug/.build-id/%.2s/%s.debug",
-                                 build_id_hex, build_id_hex + 2);
+                                 symbol_conf.symfs, build_id_hex, build_id_hex + 2);
                        }
                        break;
                case DSO__ORIG_DSO:
-                        snprintf(name, size, "%s", self->long_name);
+                        snprintf(name, size, "%s%s",
+                             symbol_conf.symfs, self->long_name);
                        break;
                case DSO__ORIG_GUEST_KMODULE:
                        if (map->groups && map->groups->machine)
                                root_dir = map->groups->machine->root_dir;
                        else
                                root_dir = "";
-                        snprintf(name, size, "%s%s", root_dir, self->long_name);
+                        snprintf(name, size, "%s%s%s", symbol_conf.symfs,
+                                 root_dir, self->long_name);
+                        break;
+                case DSO__ORIG_KMODULE:
+                        snprintf(name, size, "%s%s", symbol_conf.symfs,
+                                 self->long_name);
                        break;
                default:
@@ -1784,17 +1798,20 @@ static int dso__load_vmlinux(struct dso *self, struct map *map,
                             const char *vmlinux, symbol_filter_t filter)
 {
        int err = -1, fd;
+        char symfs_vmlinux[PATH_MAX];
-        fd = open(vmlinux, O_RDONLY);
+        snprintf(symfs_vmlinux, sizeof(symfs_vmlinux), "%s/%s",
+                 symbol_conf.symfs, vmlinux);
+        fd = open(symfs_vmlinux, O_RDONLY);
        if (fd < 0)
                return -1;
        dso__set_loaded(self, map->type);
-        err = dso__load_sym(self, map, vmlinux, fd, filter, 0, 0);
+        err = dso__load_sym(self, map, symfs_vmlinux, fd, filter, 0, 0);
        close(fd);
        if (err > 0)
-                pr_debug("Using %s for symbols\n", vmlinux);
+                pr_debug("Using %s for symbols\n", symfs_vmlinux);
        return err;
 }
@@ -1872,6 +1889,10 @@ static int dso__load_kernel_sym(struct dso *self, struct map *map,
                        goto out_fixup;
        }
+        /* do not try local files if a symfs was given */
+        if (symbol_conf.symfs[0] != 0)
+                return -1;
        /*
         * Say the kernel DSO was created when processing the build-id header table,
         * we have a build-id, so check if it is the same as the running kernel,
@@ -2262,9 +2283,6 @@ static int vmlinux_path__init(void)
        struct utsname uts;
        char bf[PATH_MAX];
-        if (uname(&uts) < 0)
-                return -1;
        vmlinux_path = malloc(sizeof(char *) * 5);
        if (vmlinux_path == NULL)
                return -1;
@@ -2277,6 +2295,14 @@ static int vmlinux_path__init(void)
        if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
                goto out_fail;
        ++vmlinux_path__nr_entries;
+        /* only try running kernel version if no symfs was given */
+        if (symbol_conf.symfs[0] != 0)
+                return 0;
+        if (uname(&uts) < 0)
+                return -1;
        snprintf(bf, sizeof(bf), "/boot/vmlinux-%s", uts.release);
        vmlinux_path[vmlinux_path__nr_entries] = strdup(bf);
        if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
@@ -2336,6 +2362,8 @@ static int setup_list(struct strlist **list, const char *list_str,
 int symbol__init(void)
 {
+        const char *symfs;
        if (symbol_conf.initialized)
                return 0;
@@ -2364,6 +2392,18 @@ int symbol__init(void)
                       symbol_conf.sym_list_str, "symbol") < 0)
                goto out_free_comm_list;
+        /*
+         * A path to symbols of "/" is identical to ""
+         * reset here for simplicity.
+         */
+        symfs = realpath(symbol_conf.symfs, NULL);
+        if (symfs == NULL)
+                symfs = symbol_conf.symfs;
+        if (strcmp(symfs, "/") == 0)
+                symbol_conf.symfs = "";
+        if (symfs != symbol_conf.symfs)
+                free((void *)symfs);
        symbol_conf.initialized = true;
        return 0;
diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h
index 12defbe18c13..bcd2f986927e 100644
--- a/tools/perf/util/symbol.h
+++ b/tools/perf/util/symbol.h
@@ -86,6 +86,7 @@ struct symbol_conf {
       struct strlist   *dso_list,
                        *comm_list,
                        *sym_list;
+        const char      *symfs;
 };
 extern struct symbol_conf symbol_conf;