In trace file version 7, only CPUs with trace data are stored in the
file. Each instance may have its own CPU count, depending on collected
traces. As the main input handler is used by the top trace instance, the
CPU count there is for the top trace instance and may differ with cpu
counts of the other instances. Added a new "max_cpu" member of the input
handler, that tracks the maximum CPU count of all instances, recorded in
the file.
Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@xxxxxxxxx>
---
lib/trace-cmd/trace-input.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/lib/trace-cmd/trace-input.c b/lib/trace-cmd/trace-input.c
index 1cc72092..b66436ab 100644
--- a/lib/trace-cmd/trace-input.c
+++ b/lib/trace-cmd/trace-input.c
@@ -133,6 +133,7 @@ struct tracecmd_input {
int long_size;
int page_size;
int page_map_size;
+ int max_cpu;
int cpus;
int ref;
int nr_buffers; /* buffer instances */
@@ -953,6 +954,7 @@ static int read_cpus(struct tracecmd_input *handle)
return -1;
handle->cpus = cpus;
+ handle->max_cpu = cpus;
tep_set_cpus(handle->pevent, handle->cpus);
handle->file_state = TRACECMD_FILE_CPU_COUNT;
@@ -2908,6 +2910,8 @@ static int handle_options(struct tracecmd_input *handle)
case TRACECMD_OPTION_CPUCOUNT:
cpus = *(int *)buf;
handle->cpus = tep_read_number(handle->pevent, &cpus, 4);
+ handle->max_cpu = handle->cpus;
+ tep_set_cpus(handle->pevent, handle->cpus);
break;
case TRACECMD_OPTION_PROCMAPS:
if (buf[size-1] == '\0')
@@ -4216,7 +4220,7 @@ int tracecmd_page_size(struct tracecmd_input *handle)
*/
int tracecmd_cpus(struct tracecmd_input *handle)
{
- return handle->cpus;
+ return handle->max_cpu;
}
/**
--
2.31.1
|