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 0c095715.
Reported-by: default avatarNamhyung Kim <namhyung@gmail.com>
Tested-by: default avatarJoerg 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.orgSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 7e1ccd38
......@@ -205,6 +205,9 @@ 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:
......@@ -218,15 +221,23 @@ static void perf_record__open(struct perf_record *rec)
} 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;
}
}
/*
......
......@@ -872,6 +872,9 @@ 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:
......@@ -883,12 +886,20 @@ static void perf_top__start_counters(struct perf_top *top)
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
......
......@@ -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;
......
......@@ -35,6 +35,7 @@ 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;
......
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