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perf session: Create guest machines from id_index

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Now that id_index has machine_pid, use it to create guest machines.
Create the guest machines with an idle thread because guest events
for "swapper" will be possible.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Ian Rogers <irogers@google.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: kvm@vger.kernel.org
Link: https://lore.kernel.org/r/20220711093218.10967-12-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Adrian Hunter
2022-07-11 12:31:54 +03:00
committed by Arnaldo Carvalho de Melo
parent b47bb18661
commit ff7a78c210
1 changed files with 31 additions and 0 deletions
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tools/perf/util/session.c
+31
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@@ -2751,6 +2751,24 @@ void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
fprintf(fp, "# ========\n#\n");
}
static int perf_session__register_guest(struct perf_session *session, pid_t machine_pid)
{
struct machine *machine = machines__findnew(&session->machines, machine_pid);
struct thread *thread;
if (!machine)
return -ENOMEM;
machine->single_address_space = session->machines.host.single_address_space;
thread = machine__idle_thread(machine);
if (!thread)
return -ENOMEM;
thread__put(thread);
return 0;
}
int perf_event__process_id_index(struct perf_session *session,
union perf_event *event)
{
@@ -2762,6 +2780,7 @@ int perf_event__process_id_index(struct perf_session *session,
size_t e2_sz = sizeof(struct id_index_entry_2);
size_t etot_sz = e1_sz + e2_sz;
struct id_index_entry_2 *e2;
pid_t last_pid = 0;
max_nr = sz / e1_sz;
nr = ie->nr;
@@ -2787,6 +2806,7 @@ int perf_event__process_id_index(struct perf_session *session,
for (i = 0; i < nr; i++, (e2 ? e2++ : 0)) {
struct id_index_entry *e = &ie->entries[i];
struct perf_sample_id *sid;
int ret;
if (dump_trace) {
fprintf(stdout, " ... id: %"PRI_lu64, e->id);
@@ -2814,6 +2834,17 @@ int perf_event__process_id_index(struct perf_session *session,
sid->machine_pid = e2->machine_pid;
sid->vcpu.cpu = e2->vcpu;
if (!sid->machine_pid)
continue;
if (sid->machine_pid != last_pid) {
ret = perf_session__register_guest(session, sid->machine_pid);
if (ret)
return ret;
last_pid = sid->machine_pid;
perf_guest = true;
}
}
return 0;
}