static void
sp_hostinfo_source_prepare (SpSource *source)
{
SpHostinfoSource *self = (SpHostinfoSource *)source;
SpCaptureCounter *counters;
g_assert (SP_IS_HOSTINFO_SOURCE (self));
self->stat_fd = open ("/proc/stat", O_RDONLY);
self->n_cpu = g_get_num_processors ();
g_array_set_size (self->cpu_info, 0);
counters = alloca (sizeof *counters * self->n_cpu * 2);
for (guint i = 0; i < self->n_cpu; i++)
{
SpCaptureCounter *ctr = &counters[i*2];
CpuInfo info = { 0 };
/*
* Request 2 counter values.
* One for CPU and one for Frequency.
*/
info.counter_base = sp_capture_writer_request_counter (self->writer, 2);
/*
* Define counters for capture file.
*/
ctr->id = info.counter_base;
ctr->type = SP_CAPTURE_COUNTER_DOUBLE;
ctr->value.vdbl = 0;
g_strlcpy (ctr->category, "CPU Percent", sizeof ctr->category);
g_snprintf (ctr->name, sizeof ctr->name, "Total CPU %d", i);
g_snprintf (ctr->description, sizeof ctr->description,
"Total CPU usage %d", i);
ctr++;
ctr->id = info.counter_base + 1;
ctr->type = SP_CAPTURE_COUNTER_DOUBLE;
ctr->value.vdbl = 0;
g_strlcpy (ctr->category, "CPU Frequency", sizeof ctr->category);
g_snprintf (ctr->name, sizeof ctr->name, "CPU %d", i);
g_snprintf (ctr->description, sizeof ctr->description,
"Frequency of CPU %d", i);
g_array_append_val (self->cpu_info, info);
}
sp_capture_writer_define_counters (self->writer,
SP_CAPTURE_CURRENT_TIME,
-1,
getpid (),
counters,
self->n_cpu * 2);
sp_source_emit_ready (SP_SOURCE (self));
}
static void
sp_hostinfo_source_stop (SpSource *source)
{
SpHostinfoSource *self = (SpHostinfoSource *)source;
g_assert (SP_IS_HOSTINFO_SOURCE (self));
g_source_remove (self->handler);
self->handler = 0;
sp_source_emit_finished (SP_SOURCE (self));
}
