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libsysprof-gtk: add track for samples with context switches

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This commit is contained in:
Christian Hergert
2023-07-05 16:31:45 -07:00
parent 3722dfefd2
commit 9263624fa0
3 changed files with 103 additions and 12 deletions
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44
src/libsysprof-analyze/sysprof-document.c
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@ -73,6 +73,7 @@ struct _SysprofDocument
EggBitset *allocations;
EggBitset *file_chunks;
EggBitset *samples;
EggBitset *samples_with_context_switch;
EggBitset *traceables;
EggBitset *processes;
EggBitset *mmaps;
@ -250,6 +251,7 @@ sysprof_document_finalize (GObject *object)
g_clear_pointer (&self->pids, egg_bitset_unref);
g_clear_pointer (&self->processes, egg_bitset_unref);
g_clear_pointer (&self->samples, egg_bitset_unref);
g_clear_pointer (&self->samples_with_context_switch, egg_bitset_unref);
g_clear_pointer (&self->traceables, egg_bitset_unref);
g_clear_pointer (&self->mark_groups, g_hash_table_unref);
@ -358,6 +360,7 @@ sysprof_document_init (SysprofDocument *self)
self->pids = egg_bitset_new_empty ();
self->processes = egg_bitset_new_empty ();
self->samples = egg_bitset_new_empty ();
self->samples_with_context_switch = egg_bitset_new_empty ();
self->traceables = egg_bitset_new_empty ();
self->files_first_position = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, NULL);
@ -911,6 +914,30 @@ sysprof_document_load_worker (GTask *task,
g_strdup (file_chunk->path),
GUINT_TO_POINTER (self->frames->len));
}
else if (tainted->type == SYSPROF_CAPTURE_FRAME_SAMPLE)
{
const SysprofCaptureSample *sample = (const SysprofCaptureSample *)tainted;
guint n_addrs = self->needs_swap ? GUINT16_SWAP_LE_BE (sample->n_addrs) : sample->n_addrs;
const guint8 *endptr = (const guint8 *)tainted + frame_len;
/* If the sample contains a context-switch, record it */
if ((const guint8 *)sample + (n_addrs * sizeof (SysprofAddress)) <= endptr)
{
SysprofAddressContext last_context = SYSPROF_ADDRESS_CONTEXT_USER;
for (guint i = 0; i < n_addrs; i++)
{
SysprofAddress addr = self->needs_swap ? GUINT64_SWAP_LE_BE (sample->addrs[i]) : sample->addrs[i];
if (sysprof_address_is_context_switch (addr, &last_context) &&
last_context == SYSPROF_ADDRESS_CONTEXT_KERNEL)
{
egg_bitset_add (self->samples_with_context_switch, self->frames->len);
break;
}
}
}
}
else if (tainted->type == SYSPROF_CAPTURE_FRAME_MARK)
{
const SysprofCaptureMark *mark = (const SysprofCaptureMark *)tainted;
@ -1392,6 +1419,23 @@ sysprof_document_list_samples (SysprofDocument *self)
return _sysprof_document_bitset_index_new (G_LIST_MODEL (self), self->samples);
}
/**
* sysprof_document_list_samples_with_context_switch:
* @self: a #SysprofDocument
*
* Gets a #GListModel containing #SysprofDocumentSample found within
* the #SysprofDocument which contain a context switch.
*
* Returns: (transfer full): a #GListModel of #SysprofDocumentSample
*/
GListModel *
sysprof_document_list_samples_with_context_switch (SysprofDocument *self)
{
g_return_val_if_fail (SYSPROF_IS_DOCUMENT (self), NULL);
return _sysprof_document_bitset_index_new (G_LIST_MODEL (self), self->samples_with_context_switch);
}
/**
* sysprof_document_list_processes:
* @self: a #SysprofDocument