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sysprof: fix double accounting in recursion

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We don't want to cost-account the same summary multiple times while walking
up to the root. Otherwise, you can get items which come out to a percentage
of > 100% which is not exactly what you're expecting to see as a normalized
value.
This commit is contained in:
Christian Hergert
2023-08-25 12:43:57 -07:00
parent a28353eb76
commit 8a43440f6a
1 changed files with 24 additions and 8 deletions
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32
src/sysprof/sysprof-weighted-callgraph-view.c
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@ -24,6 +24,8 @@
#include "sysprof-weighted-callgraph-view.h"
#include "sysprof-progress-cell-private.h"
#include "sysprof-callgraph-private.h"
struct _SysprofWeightedCallgraphView
{
SysprofCallgraphView parent_instance;
@ -57,6 +59,21 @@ typedef struct _AugmentWeight
G_DEFINE_FINAL_TYPE (SysprofWeightedCallgraphView, sysprof_weighted_callgraph_view, SYSPROF_TYPE_CALLGRAPH_VIEW)
static gboolean
seen_symbol (const SysprofCallgraphNode *node,
const SysprofCallgraphNode *toplevel)
{
for (const SysprofCallgraphNode *iter = toplevel;
iter != node;
iter = iter->parent)
{
if (iter->summary == node->summary)
return TRUE;
}
return FALSE;
}
static void
augment_weight (SysprofCallgraph *callgraph,
SysprofCallgraphNode *node,
@ -64,6 +81,7 @@ augment_weight (SysprofCallgraph *callgraph,
gboolean summarize,
gpointer user_data)
{
SysprofCallgraphNode *iter;
AugmentWeight *cur;
AugmentWeight *sum;
@ -83,16 +101,14 @@ augment_weight (SysprofCallgraph *callgraph,
sum->total += 1;
}
for (node = sysprof_callgraph_node_parent (node);
node != NULL;
node = sysprof_callgraph_node_parent (node))
for (iter = node->parent; iter; iter = iter->parent)
{
cur = sysprof_callgraph_get_augment (callgraph, node);
cur = sysprof_callgraph_get_augment (callgraph, iter);
cur->total += 1;
if (summarize)
if (summarize && !seen_symbol (iter, node))
{
sum = sysprof_callgraph_get_summary_augment (callgraph, node);
sum = sysprof_callgraph_get_summary_augment (callgraph, iter);
sum->total += 1;
}
}
@ -170,7 +186,7 @@ functions_get_total_fraction (GObject *item)
{
SysprofCallgraph *callgraph = sysprof_callgraph_symbol_get_callgraph (sym);
AugmentWeight *sum = sysprof_callgraph_symbol_get_summary_augment (sym);
AugmentWeight *root = sysprof_callgraph_get_augment (callgraph, NULL);
AugmentWeight *root = sysprof_callgraph_get_summary_augment (callgraph, NULL);
return sum->total / (double)root->total;
}
@ -189,7 +205,7 @@ functions_get_self_fraction (GObject *item)
{
SysprofCallgraph *callgraph = sysprof_callgraph_symbol_get_callgraph (sym);
AugmentWeight *sum = sysprof_callgraph_symbol_get_summary_augment (sym);
AugmentWeight *root = sysprof_callgraph_get_augment (callgraph, NULL);
AugmentWeight *root = sysprof_callgraph_get_summary_augment (callgraph, NULL);
return sum->size / (double)root->total;
}