lkml.org 
[lkml]   [2017]   [Feb]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 04/14] perf tools: Propagate perf_config() errors
Date
From: Arnaldo Carvalho de Melo <acme@redhat.com>

Previously these were being ignored, sometimes silently.

Stop doing that, emitting debug messages and handling the errors.

Testing it:

$ cat ~/.perfconfig
cat: /home/acme/.perfconfig: No such file or directory
$ perf stat -e cycles usleep 1

Performance counter stats for 'usleep 1':

938,996 cycles:u

0.003813731 seconds time elapsed

$ perf top --stdio
Error:
You may not have permission to collect system-wide stats.

Consider tweaking /proc/sys/kernel/perf_event_paranoid,
<SNIP>
[ perf record: Captured and wrote 0.019 MB perf.data (7 samples) ]
[acme@jouet linux]$ perf report --stdio
# To display the perf.data header info, please use --header/--header-only options.
# Overhead Command Shared Object Symbol
# ........ ....... ................. .........................
71.77% usleep libc-2.24.so [.] _dl_addr
27.07% usleep ld-2.24.so [.] _dl_next_ld_env_entry
1.13% usleep [kernel.kallsyms] [k] page_fault
$
$ touch ~/.perfconfig
$ ls -la ~/.perfconfig
-rw-rw-r--. 1 acme acme 0 Jan 27 12:14 /home/acme/.perfconfig
$
$ perf stat -e instructions usleep 1

Performance counter stats for 'usleep 1':

244,610 instructions:u

0.000805383 seconds time elapsed

$
[root@jouet ~]# chown acme.acme ~/.perfconfig
[root@jouet ~]# perf stat -e cycles usleep 1
Warning: File /root/.perfconfig not owned by current user or root, ignoring it.

Performance counter stats for 'usleep 1':

937,615 cycles

0.000836931 seconds time elapsed
#

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-j2rq96so6xdqlr8p8rd6a3jx@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/builtin-help.c | 6 ++++--
tools/perf/builtin-kmem.c | 8 ++++++--
tools/perf/builtin-record.c | 4 +++-
tools/perf/builtin-report.c | 4 +++-
tools/perf/builtin-top.c | 4 +++-
tools/perf/perf.c | 15 ++++++++++-----
tools/perf/util/callchain.c | 16 ++++++++++++++--
tools/perf/util/config.c | 9 +++++----
tools/perf/util/data-convert-bt.c | 7 +++++--
tools/perf/util/hist.c | 4 +++-
tools/perf/util/intel-pt.c | 4 +++-
tools/perf/util/llvm-utils.c | 4 +++-
12 files changed, 62 insertions(+), 23 deletions(-)

diff --git a/tools/perf/builtin-help.c b/tools/perf/builtin-help.c
index 93da24a638be..aed0d844e8c2 100644
--- a/tools/perf/builtin-help.c
+++ b/tools/perf/builtin-help.c
@@ -447,11 +447,13 @@ int cmd_help(int argc, const char **argv, const char *prefix __maybe_unused)
NULL
};
const char *alias;
- int rc = 0;
+ int rc;

load_command_list("perf-", &main_cmds, &other_cmds);

- perf_config(perf_help_config, &help_format);
+ rc = perf_config(perf_help_config, &help_format);
+ if (rc)
+ return rc;

argc = parse_options_subcommand(argc, argv, builtin_help_options,
builtin_help_subcommands, builtin_help_usage, 0);
diff --git a/tools/perf/builtin-kmem.c b/tools/perf/builtin-kmem.c
index 915869e00d86..29f4751a3574 100644
--- a/tools/perf/builtin-kmem.c
+++ b/tools/perf/builtin-kmem.c
@@ -1920,10 +1920,12 @@ int cmd_kmem(int argc, const char **argv, const char *prefix __maybe_unused)
NULL
};
struct perf_session *session;
- int ret = -1;
const char errmsg[] = "No %s allocation events found. Have you run 'perf kmem record --%s'?\n";
+ int ret = perf_config(kmem_config, NULL);
+
+ if (ret)
+ return ret;

- perf_config(kmem_config, NULL);
argc = parse_options_subcommand(argc, argv, kmem_options,
kmem_subcommands, kmem_usage, 0);

@@ -1948,6 +1950,8 @@ int cmd_kmem(int argc, const char **argv, const char *prefix __maybe_unused)
if (session == NULL)
return -1;

+ ret = -1;
+
if (kmem_slab) {
if (!perf_evlist__find_tracepoint_by_name(session->evlist,
"kmem:kmalloc")) {
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 33a9eaaf9db4..ffac8ca9fb01 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -1670,7 +1670,9 @@ int cmd_record(int argc, const char **argv, const char *prefix __maybe_unused)
if (rec->evlist == NULL)
return -ENOMEM;

- perf_config(perf_record_config, rec);
+ err = perf_config(perf_record_config, rec);
+ if (err)
+ return err;

argc = parse_options(argc, argv, record_options, record_usage,
PARSE_OPT_STOP_AT_NON_OPTION);
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 06cc759a4597..dbd7fa028861 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -847,7 +847,9 @@ int cmd_report(int argc, const char **argv, const char *prefix __maybe_unused)
if (ret < 0)
return ret;

- perf_config(report__config, &report);
+ ret = perf_config(report__config, &report);
+ if (ret)
+ return ret;

argc = parse_options(argc, argv, options, report_usage, 0);
if (argc) {
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 3df4178ba378..20aef9815cd8 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -1216,7 +1216,9 @@ int cmd_top(int argc, const char **argv, const char *prefix __maybe_unused)
if (top.evlist == NULL)
return -ENOMEM;

- perf_config(perf_top_config, &top);
+ status = perf_config(perf_top_config, &top);
+ if (status)
+ return status;

argc = parse_options(argc, argv, options, top_usage, 0);
if (argc)
diff --git a/tools/perf/perf.c b/tools/perf/perf.c
index 34bcf90f8871..6d5479e03e0d 100644
--- a/tools/perf/perf.c
+++ b/tools/perf/perf.c
@@ -90,11 +90,12 @@ static int pager_command_config(const char *var, const char *value, void *data)
/* returns 0 for "no pager", 1 for "use pager", and -1 for "not specified" */
int check_pager_config(const char *cmd)
{
+ int err;
struct pager_config c;
c.cmd = cmd;
c.val = -1;
- perf_config(pager_command_config, &c);
- return c.val;
+ err = perf_config(pager_command_config, &c);
+ return err ?: c.val;
}

static int browser_command_config(const char *var, const char *value, void *data)
@@ -113,11 +114,12 @@ static int browser_command_config(const char *var, const char *value, void *data
*/
static int check_browser_config(const char *cmd)
{
+ int err;
struct pager_config c;
c.cmd = cmd;
c.val = -1;
- perf_config(browser_command_config, &c);
- return c.val;
+ err = perf_config(browser_command_config, &c);
+ return err ?: c.val;
}

static void commit_pager_choice(void)
@@ -509,6 +511,7 @@ static void cache_line_size(int *cacheline_sizep)

int main(int argc, const char **argv)
{
+ int err;
const char *cmd;
char sbuf[STRERR_BUFSIZE];
int value;
@@ -534,7 +537,9 @@ int main(int argc, const char **argv)
srandom(time(NULL));

perf_config__init();
- perf_config(perf_default_config, NULL);
+ err = perf_config(perf_default_config, NULL);
+ if (err)
+ return err;
set_buildid_dir(NULL);

/* get debugfs/tracefs mount point from /proc/mounts */
diff --git a/tools/perf/util/callchain.c b/tools/perf/util/callchain.c
index 42922512c1c6..e16db30dfe40 100644
--- a/tools/perf/util/callchain.c
+++ b/tools/perf/util/callchain.c
@@ -48,6 +48,8 @@ static int parse_callchain_mode(const char *value)
callchain_param.mode = CHAIN_FOLDED;
return 0;
}
+
+ pr_err("Invalid callchain mode: %s\n", value);
return -1;
}

@@ -63,6 +65,8 @@ static int parse_callchain_order(const char *value)
callchain_param.order_set = true;
return 0;
}
+
+ pr_err("Invalid callchain order: %s\n", value);
return -1;
}

@@ -80,6 +84,8 @@ static int parse_callchain_sort_key(const char *value)
callchain_param.branch_callstack = 1;
return 0;
}
+
+ pr_err("Invalid callchain sort key: %s\n", value);
return -1;
}

@@ -97,6 +103,8 @@ static int parse_callchain_value(const char *value)
callchain_param.value = CCVAL_COUNT;
return 0;
}
+
+ pr_err("Invalid callchain config key: %s\n", value);
return -1;
}

@@ -210,13 +218,17 @@ int perf_callchain_config(const char *var, const char *value)
return parse_callchain_sort_key(value);
if (!strcmp(var, "threshold")) {
callchain_param.min_percent = strtod(value, &endptr);
- if (value == endptr)
+ if (value == endptr) {
+ pr_err("Invalid callchain threshold: %s\n", value);
return -1;
+ }
}
if (!strcmp(var, "print-limit")) {
callchain_param.print_limit = strtod(value, &endptr);
- if (value == endptr)
+ if (value == endptr) {
+ pr_err("Invalid callchain print limit: %s\n", value);
return -1;
+ }
}

return 0;
diff --git a/tools/perf/util/config.c b/tools/perf/util/config.c
index 615e8b4a693b..0c7d5a4975cd 100644
--- a/tools/perf/util/config.c
+++ b/tools/perf/util/config.c
@@ -386,8 +386,10 @@ static int perf_buildid_config(const char *var, const char *value)
if (!strcmp(var, "buildid.dir")) {
const char *dir = perf_config_dirname(var, value);

- if (!dir)
+ if (!dir) {
+ pr_err("Invalid buildid directory!\n");
return -1;
+ }
strncpy(buildid_dir, dir, MAXPATHLEN-1);
buildid_dir[MAXPATHLEN-1] = '\0';
}
@@ -405,10 +407,9 @@ static int perf_default_core_config(const char *var __maybe_unused,
static int perf_ui_config(const char *var, const char *value)
{
/* Add other config variables here. */
- if (!strcmp(var, "ui.show-headers")) {
+ if (!strcmp(var, "ui.show-headers"))
symbol_conf.show_hist_headers = perf_config_bool(var, value);
- return 0;
- }
+
return 0;
}

diff --git a/tools/perf/util/data-convert-bt.c b/tools/perf/util/data-convert-bt.c
index 7123f4de32cc..4e6cbc99f08e 100644
--- a/tools/perf/util/data-convert-bt.c
+++ b/tools/perf/util/data-convert-bt.c
@@ -1473,7 +1473,7 @@ int bt_convert__perf2ctf(const char *input, const char *path,
},
};
struct ctf_writer *cw = &c.writer;
- int err = -1;
+ int err;

if (opts->all) {
c.tool.comm = process_comm_event;
@@ -1481,12 +1481,15 @@ int bt_convert__perf2ctf(const char *input, const char *path,
c.tool.fork = process_fork_event;
}

- perf_config(convert__config, &c);
+ err = perf_config(convert__config, &c);
+ if (err)
+ return err;

/* CTF writer */
if (ctf_writer__init(cw, path))
return -1;

+ err = -1;
/* perf.data session */
session = perf_session__new(&file, 0, &c.tool);
if (!session)
diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
index 6770a9645609..cff2e9041b15 100644
--- a/tools/perf/util/hist.c
+++ b/tools/perf/util/hist.c
@@ -2439,8 +2439,10 @@ int parse_filter_percentage(const struct option *opt __maybe_unused,
symbol_conf.filter_relative = true;
else if (!strcmp(arg, "absolute"))
symbol_conf.filter_relative = false;
- else
+ else {
+ pr_debug("Invalud percentage: %s\n", arg);
return -1;
+ }

return 0;
}
diff --git a/tools/perf/util/intel-pt.c b/tools/perf/util/intel-pt.c
index 85d5eeb66c75..da20cd5612e9 100644
--- a/tools/perf/util/intel-pt.c
+++ b/tools/perf/util/intel-pt.c
@@ -2159,7 +2159,9 @@ int intel_pt_process_auxtrace_info(union perf_event *event,

addr_filters__init(&pt->filts);

- perf_config(intel_pt_perf_config, pt);
+ err = perf_config(intel_pt_perf_config, pt);
+ if (err)
+ goto err_free;

err = auxtrace_queues__init(&pt->queues);
if (err)
diff --git a/tools/perf/util/llvm-utils.c b/tools/perf/util/llvm-utils.c
index b23ff44cf214..824356488ce6 100644
--- a/tools/perf/util/llvm-utils.c
+++ b/tools/perf/util/llvm-utils.c
@@ -48,8 +48,10 @@ int perf_llvm_config(const char *var, const char *value)
llvm_param.kbuild_opts = strdup(value);
else if (!strcmp(var, "dump-obj"))
llvm_param.dump_obj = !!perf_config_bool(var, value);
- else
+ else {
+ pr_debug("Invalid LLVM config option: %s\n", value);
return -1;
+ }
llvm_param.user_set_param = true;
return 0;
}
--
2.9.3
\
 
 \ /
  Last update: 2017-02-01 13:29    [W:0.096 / U:18.264 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site