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authorArnaldo Carvalho de Melo <acme@redhat.com>2012-02-14 14:05:30 -0200
committerArnaldo Carvalho de Melo <acme@redhat.com>2012-03-03 12:19:56 -0300
commitbc76efe64533305b55d1f0834fd03414da8a12b2 (patch)
tree4494b12fe85f4a4f088a82588d23b2e19e6500ad /tools/perf
parent8f54ed4a2d8cf001456d3779bdb33985a050bf03 (diff)
perf tools: Handle kernels that don't support attr.exclude_{guest,host}
Just fall back to resetting those fields, if set, warning the user that that feature is not available. If guest samples appear they will just be discarded because no struct machine will be found and thus the event will be accounted as not handled and dropped, see 0c09571. Reported-by: Namhyung Kim <namhyung@gmail.com> Tested-by: Joerg Roedel <joerg.roedel@amd.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Joerg Roedel <joerg.roedel@amd.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-vuwxig36mzprl5n7nzvnxxsh@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf')
-rw-r--r--tools/perf/builtin-record.c29
-rw-r--r--tools/perf/builtin-top.c23
-rw-r--r--tools/perf/perf.h1
-rw-r--r--tools/perf/util/top.h1
4 files changed, 39 insertions, 15 deletions
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 39b6a4067f88..227b6ae99785 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -204,6 +204,9 @@ static void perf_record__open(struct perf_record *rec)
if (opts->group && pos != first)
group_fd = first->fd;
+fallback_missing_features:
+ if (opts->exclude_guest_missing)
+ attr->exclude_guest = attr->exclude_host = 0;
retry_sample_id:
attr->sample_id_all = opts->sample_id_all_avail ? 1 : 0;
try_again:
@@ -217,15 +220,23 @@ try_again:
} else if (err == ENODEV && opts->cpu_list) {
die("No such device - did you specify"
" an out-of-range profile CPU?\n");
- } else if (err == EINVAL && opts->sample_id_all_avail) {
- /*
- * Old kernel, no attr->sample_id_type_all field
- */
- opts->sample_id_all_avail = false;
- if (!opts->sample_time && !opts->raw_samples && !time_needed)
- attr->sample_type &= ~PERF_SAMPLE_TIME;
-
- goto retry_sample_id;
+ } else if (err == EINVAL) {
+ if (!opts->exclude_guest_missing &&
+ (attr->exclude_guest || attr->exclude_host)) {
+ pr_debug("Old kernel, cannot exclude "
+ "guest or host samples.\n");
+ opts->exclude_guest_missing = true;
+ goto fallback_missing_features;
+ } else if (opts->sample_id_all_avail) {
+ /*
+ * Old kernel, no attr->sample_id_type_all field
+ */
+ opts->sample_id_all_avail = false;
+ if (!opts->sample_time && !opts->raw_samples && !time_needed)
+ attr->sample_type &= ~PERF_SAMPLE_TIME;
+
+ goto retry_sample_id;
+ }
}
/*
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index dd162aa24baa..ecff31257eb3 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -857,6 +857,9 @@ static void perf_top__start_counters(struct perf_top *top)
attr->mmap = 1;
attr->comm = 1;
attr->inherit = top->inherit;
+fallback_missing_features:
+ if (top->exclude_guest_missing)
+ attr->exclude_guest = attr->exclude_host = 0;
retry_sample_id:
attr->sample_id_all = top->sample_id_all_avail ? 1 : 0;
try_again:
@@ -868,12 +871,20 @@ try_again:
if (err == EPERM || err == EACCES) {
ui__error_paranoid();
goto out_err;
- } else if (err == EINVAL && top->sample_id_all_avail) {
- /*
- * Old kernel, no attr->sample_id_type_all field
- */
- top->sample_id_all_avail = false;
- goto retry_sample_id;
+ } else if (err == EINVAL) {
+ if (!top->exclude_guest_missing &&
+ (attr->exclude_guest || attr->exclude_host)) {
+ pr_debug("Old kernel, cannot exclude "
+ "guest or host samples.\n");
+ top->exclude_guest_missing = true;
+ goto fallback_missing_features;
+ } else if (top->sample_id_all_avail) {
+ /*
+ * Old kernel, no attr->sample_id_type_all field
+ */
+ top->sample_id_all_avail = false;
+ goto retry_sample_id;
+ }
}
/*
* If it's cycles then fall back to hrtimer
diff --git a/tools/perf/perf.h b/tools/perf/perf.h
index 64f8bee31ced..16e7d20eee83 100644
--- a/tools/perf/perf.h
+++ b/tools/perf/perf.h
@@ -199,6 +199,7 @@ struct perf_record_opts {
bool sample_address;
bool sample_time;
bool sample_id_all_avail;
+ bool exclude_guest_missing;
bool system_wide;
bool period;
unsigned int freq;
diff --git a/tools/perf/util/top.h b/tools/perf/util/top.h
index a248f3c2c60d..f2eab81435ae 100644
--- a/tools/perf/util/top.h
+++ b/tools/perf/util/top.h
@@ -34,6 +34,7 @@ struct perf_top {
bool inherit;
bool group;
bool sample_id_all_avail;
+ bool exclude_guest_missing;
bool dump_symtab;
const char *cpu_list;
struct hist_entry *sym_filter_entry;