[benchmarking] reduce the shard count for win 7 builders

We only have 4 bots on win7-perf and there's no backup for those old models. Now we are only running a small set of tests on win 7, we can reduce the shard count to 3 to avoid capacity issue.

Bug: chromium:1146593
Change-Id: I05187c0b65742cd9f06d12ee1e180065a548f30b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2525860Reviewed-by: John Chen <johnchen@chromium.org>
Commit-Queue: Wenbin Zhang <wenbinzhang@google.com>
Cr-Commit-Position: refs/heads/master@{#825670}

testing/buildbot/chromium.perf.json

@@ -128,7 +128,7 @@
           "ignore_task_failure": false,
           "io_timeout": 21600,
           "service_account": "chrome-tester@chops-service-accounts.iam.gserviceaccount.com",
-          "shards": 4
+          "shards": 3
         },
         "trigger_script": {
           "args": [
@@ -173,7 +173,7 @@
           "ignore_task_failure": false,
           "io_timeout": 21600,
           "service_account": "chrome-tester@chops-service-accounts.iam.gserviceaccount.com",
-          "shards": 4
+          "shards": 3
         },
         "trigger_script": {
           "args": [

tools/perf/core/bot_platforms.py

@@ -491,9 +491,9 @@ WIN_10 = PerfPlatform(
     'Windows Intel HD 630 towers, Core i7-7700 3.6 GHz, 16GB RAM,'
     ' Intel Kaby Lake HD Graphics 630', _WIN_10_BENCHMARK_CONFIGS,
     26, 'win', executables=_WIN_10_EXECUTABLE_CONFIGS)
-WIN_7 = PerfPlatform('Win 7 Perf', 'N/A', _WIN_7_BENCHMARK_CONFIGS, 4, 'win')
+WIN_7 = PerfPlatform('Win 7 Perf', 'N/A', _WIN_7_BENCHMARK_CONFIGS, 3, 'win')
 WIN_7_GPU = PerfPlatform('Win 7 Nvidia GPU Perf', 'N/A',
-                         _WIN_7_GPU_BENCHMARK_CONFIGS, 4, 'win')
+                         _WIN_7_GPU_BENCHMARK_CONFIGS, 3, 'win')
 
 # Android
 ANDROID_GO = PerfPlatform(

tools/perf/core/shard_maps/timing_data/win_7_nvidia_gpu_perf_timing.json

 [
     {
-        "duration": "21.0",
+        "duration": "37.0",
         "name": "rendering.desktop/css_value_type_shadow"
     },
     {
-        "duration": "21.0",
+        "duration": "35.0",
         "name": "rendering.desktop/main_30fps_impl_60fps"
     }
 ]
\ No newline at end of file

tools/perf/core/shard_maps/timing_data/win_7_perf_timing.json

 [
     {
-        "duration": "54.0",
+        "duration": "56.0",
         "name": "loading.desktop/AirBnB_warm"
     },
     {
-        "duration": "34.0",
+        "duration": "36.0",
         "name": "loading.desktop/Aljayyash_cold"
     },
     {
-        "duration": "12.0",
+        "duration": "13.0",
         "name": "loading.desktop/AllRecipes_cold"
     },
     {
-        "duration": "44.0",
+        "duration": "48.0",
         "name": "loading.desktop/Baidu_warm"
     },
     {
-        "duration": "28.0",
+        "duration": "45.0",
         "name": "loading.desktop/Naver_cold"
     },
     {
-        "duration": "7.0",
+        "duration": "8.0",
         "name": "loading.desktop/Orange_cold"
     },
     {
-        "duration": "7.0",
+        "duration": "8.0",
         "name": "loading.desktop/Orange_warm"
     },
     {
-        "duration": "54.0",
+        "duration": "40.0",
         "name": "loading.desktop/Taobao_warm"
     },
     {
-        "duration": "29.0",
+        "duration": "31.0",
         "name": "loading.desktop/TheOnion_cold"
     },
     {
-        "duration": "23.0",
+        "duration": "24.0",
         "name": "loading.desktop/ru.wikipedia_warm"
     }
 ]
\ No newline at end of file

tools/perf/core/shard_maps/win_7_nvidia_gpu_perf_map.json

@@ -11,7 +11,7 @@
         "benchmarks": {
             "rendering.desktop": {
                 "begin": 4,
-                "end": 6,
+                "end": 7,
                 "abridged": true
             }
         }
@@ -19,29 +19,19 @@
     "2": {
         "benchmarks": {
             "rendering.desktop": {
-                "begin": 6,
-                "end": 8,
-                "abridged": true
-            }
-        }
-    },
-    "3": {
-        "benchmarks": {
-            "rendering.desktop": {
-                "begin": 8,
+                "begin": 7,
                 "abridged": true
             }
         }
     },
     "extra_infos": {
         "num_stories": 12,
-        "predicted_min_shard_time": 31.0,
-        "predicted_min_shard_index": 1,
-        "predicted_max_shard_time": 40,
-        "predicted_max_shard_index": 0,
+        "predicted_min_shard_time": 40,
+        "predicted_min_shard_index": 0,
+        "predicted_max_shard_time": 82.0,
+        "predicted_max_shard_index": 1,
         "shard #0": 40,
-        "shard #1": 31.0,
-        "shard #2": 31.0,
-        "shard #3": 40
+        "shard #1": 82.0,
+        "shard #2": 50
     }
 }
\ No newline at end of file

tools/perf/core/shard_maps/win_7_perf_map.json

@@ -2,7 +2,7 @@
     "0": {
         "benchmarks": {
             "loading.desktop": {
-                "end": 4,
+                "end": 5,
                 "abridged": true
             }
         }
@@ -10,8 +10,8 @@
     "1": {
         "benchmarks": {
             "loading.desktop": {
-                "begin": 4,
-                "end": 6,
+                "begin": 5,
+                "end": 7,
                 "abridged": true
             }
         }
@@ -19,29 +19,19 @@
     "2": {
         "benchmarks": {
             "loading.desktop": {
-                "begin": 6,
-                "end": 8,
-                "abridged": true
-            }
-        }
-    },
-    "3": {
-        "benchmarks": {
-            "loading.desktop": {
-                "begin": 8,
+                "begin": 7,
                 "abridged": true
             }
         }
     },
     "extra_infos": {
         "num_stories": 10,
-        "predicted_min_shard_time": 228.0,
-        "predicted_min_shard_index": 2,
-        "predicted_max_shard_time": 392.0,
-        "predicted_max_shard_index": 1,
-        "shard #0": 284.0,
-        "shard #1": 392.0,
-        "shard #2": 228.0,
-        "shard #3": 264.0
+        "predicted_min_shard_time": 170.0,
+        "predicted_min_shard_index": 1,
+        "predicted_max_shard_time": 248.0,
+        "predicted_max_shard_index": 0,
+        "shard #0": 248.0,
+        "shard #1": 170.0,
+        "shard #2": 200.0
     }
 }
\ No newline at end of file