commit 654904f0f9c42458cae2b1931265f97f8fb6cb95
author Mark Salyzyn <salyzyn@google.com> Mon Apr 20 13:35:15 2015 -0700
committer Mark Salyzyn <salyzyn@google.com> Wed May 13 09:23:01 2015 -0700
tree 9c6e749b9f0cd6ac1eaff346cf0e5fddd458235c
parent 66091f11f427587bf810d89b0f64be556e1cd168

logd: Add TID statistics

(cherry pick from commit 17ed6797df722464eb5cc6dfc3e1e32aec284b70)

Bug: 19608965
Change-Id: Ifbf0b00c48ef12b5970b9f9f217bd1dd8f587f2c

logd/LogStatistics.cpp

diff --git a/logd/LogStatistics.cpp b/logd/LogStatistics.cpp
index 675b692..90c49c0 100644
--- a/logd/LogStatistics.cpp
+++ b/logd/LogStatistics.cpp
@@ -83,6 +83,7 @@
     }
 
     pidTable.add(e->getPid(), e);
+    tidTable.add(e->getTid(), e);
 
     uint32_t tag = e->getTag();
     if (tag) {
@@ -107,6 +108,7 @@
     }
 
     pidTable.subtract(e->getPid(), e);
+    tidTable.subtract(e->getTid(), e);
 
     uint32_t tag = e->getTag();
     if (tag) {
@@ -128,6 +130,7 @@
     }
 
     pidTable.drop(e->getPid(), e);
+    tidTable.drop(e->getTid(), e);
 }
 
 // caller must own and free character string
@@ -390,6 +393,63 @@
         }
     }
 
+    if (enable) {
+        // Tid table
+        bool headerPrinted = false;
+        // sort() returns list of references, unique_ptr makes sure self-delete
+        std::unique_ptr<const TidEntry *[]> sorted = tidTable.sort(maximum_sorted_entries);
+        ssize_t index = -1;
+        while ((index = tidTable.next(index, sorted, maximum_sorted_entries)) >= 0) {
+            const TidEntry *entry = sorted[index];
+            uid_t u = entry->getUid();
+            if ((uid != AID_ROOT) && (u != uid)) {
+                continue;
+            }
+
+            if (!headerPrinted) { // Only print header if we have table to print
+                output.appendFormat("\n\n");
+                android::String8 name("Chattiest TIDs:");
+                android::String8 size("Size");
+                android::String8 pruned("Pruned");
+                format_line(output, name, size, pruned);
+
+                name.setTo("  TID/UID   COMM");
+                size.setTo("BYTES");
+                pruned.setTo("LINES");
+                format_line(output, name, size, pruned);
+
+                headerPrinted = true;
+            }
+
+            android::String8 name("");
+            name.appendFormat("%5u/%u", entry->getKey(), u);
+            const char *n = entry->getName();
+            if (n) {
+                name.appendFormat("%*s%s", (int)std::max(12 - name.length(), (size_t)1), "", n);
+            } else {
+                // if we do not have a PID name, lets punt to try UID name?
+                char *un = uidToName(u);
+                if (un) {
+                    name.appendFormat("%*s%s", (int)std::max(12 - name.length(), (size_t)1), "", un);
+                    free(un);
+                }
+                // We tried, better to not have a name at all, we still
+                // have TID/UID by number to report in any case.
+            }
+
+            android::String8 size("");
+            size.appendFormat("%zu", entry->getSizes());
+
+            android::String8 pruned("");
+            size_t dropped = entry->getDropped();
+            if (dropped) {
+                pruned.appendFormat("%zu", dropped);
+            }
+
+            format_line(output, name, size, pruned);
+        }
+    }
+
     if (enable && (logMask & (1 << LOG_ID_EVENTS))) {
         // Tag table
         bool headerPrinted = false;