commit 17d4b822a04a12b896fdbdbd6a9ae29ac0d8ccdc
author Mike Klein <mtklein@chromium.org> Mon Apr 23 11:26:23 2018 -0400
committer Skia Commit-Bot <skia-commit-bot@chromium.org> Mon Apr 23 15:39:48 2018 +0000
tree 68686e0966e7683125daf98b01e100f0fa60ffa4
parent 71966da6705d6e49b518e56bb829708b797b67b9

SKCMS_PROFILE support on ARMv7

__builtin_readcyclecounter() is privileged there...

Change-Id: I299eb116847bc85b8be2b82692427b32d8211dca
Reviewed-on: https://skia-review.googlesource.com/122958
Auto-Submit: Mike Klein <mtklein@chromium.org>
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>

build/android-arm.profile

diff --git a/build/android-arm.profile b/build/android-arm.profile
new file mode 100644
index 0000000..54d67b5
--- /dev/null
+++ b/build/android-arm.profile
@@ -0,0 +1,3 @@
+mode         = .profile
+extra_cflags = -DSKCMS_PROFILE
+include build/android-arm

src/Transform.c

diff --git a/src/Transform.c b/src/Transform.c
index 204bb9f..4edff05 100644
--- a/src/Transform.c
+++ b/src/Transform.c
@@ -22,17 +22,26 @@
     #include <stdio.h>
     #include <stdlib.h>
 
+    #if defined(__arm__)
+        #include <time.h>
+        static const char* now_units = "ticks";
+        static uint64_t now() { return (uint64_t)clock(); }
+    #else
+        static const char* now_units = "cycles";
+        static uint64_t now() { return __builtin_readcyclecounter(); }
+    #endif
+
     #define M(op) +1
-    static uint64_t cycles[FOREACH_Op(M)];
+    static uint64_t counts[FOREACH_Op(M)];
     #undef M
 
     static void profile_dump_stats() {
     #define M(op) #op,
         static const char* names[] = { FOREACH_Op(M) };
     #undef M
-        for (int i = 0; i < ARRAY_COUNT(cycles); i++) {
-            if (cycles[i]) {
-                fprintf(stderr, "%16s: %12llu cycles\n", names[i], cycles[i]);
+        for (int i = 0; i < ARRAY_COUNT(counts); i++) {
+            if (counts[i]) {
+                fprintf(stderr, "%16s: %12llu %s\n", names[i], counts[i], now_units);
             }
         }
     }
@@ -44,11 +53,11 @@
         if (!current) {
             atexit(profile_dump_stats);
         } else {
-            *current += __builtin_readcyclecounter() - start;
+            *current += now() - start;
         }
 
-        current = &cycles[op];
-        start   = __builtin_readcyclecounter();
+        current = &counts[op];
+        start   = now();
         return op;
     }
 #else