AU: clean up logs

delta_performer.cc

 // Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "update_engine/delta_performer.h"
 #include <endian.h>
 #include <errno.h>
 #include <algorithm>
 #include <cstring>
 #include <string>
@@ skipping 175 matching lines @@
   ssize_t total_operations = manifest_.install_operations_size() +
       manifest_.kernel_install_operations_size();
   while (next_operation_num_ < total_operations) {
     const DeltaArchiveManifest_InstallOperation &op =
         next_operation_num_ < manifest_.install_operations_size() ?
         manifest_.install_operations(next_operation_num_) :
         manifest_.kernel_install_operations(
             next_operation_num_ - manifest_.install_operations_size());
     if (!CanPerformInstallOperation(op))
       break;
-    LOG(INFO) << "Performing operation " << next_operation_num_ << "/"
-              << total_operations;
+    // Log every thousandth operation, and also the first and last ones
+    if ((next_operation_num_ % 1000 == 0) ||
+        (next_operation_num_ + 1 == total_operations)) {
+      LOG(INFO) << "Performing operation " << (next_operation_num_ + 1) << "/"
+                << total_operations;
+    }
     bool is_kernel_partition =
         (next_operation_num_ >= manifest_.install_operations_size());
     if (op.type() == DeltaArchiveManifest_InstallOperation_Type_REPLACE ||
         op.type() == DeltaArchiveManifest_InstallOperation_Type_REPLACE_BZ) {
       if (!PerformReplaceOperation(op, is_kernel_partition)) {
         LOG(ERROR) << "Failed to perform replace operation "
                    << next_operation_num_;
         return -EINVAL;
       }
     } else if (op.type() == DeltaArchiveManifest_InstallOperation_Type_MOVE) {
@@ skipping 217 matching lines @@
         utils::PWriteAll(fd, &zeros[0], end_byte - begin_byte, begin_byte));
   }
 
   // Update buffer.
   buffer_offset_ += operation.data_length();
   RemoveBufferHeadBytes(&buffer_, operation.data_length());
   return true;
 }
 
 }  // namespace chromeos_update_engine