Fix timing scale

Author: ldematte

qa/vector/src/main/java/org/elasticsearch/test/knn/KnnIndexer.java

@@ -290,7 +290,7 @@ public void run() {
             } catch (IOException ioe) {
                 throw new UncheckedIOException(ioe);
             }
-            logger.debug("Index thread times: [{}s] read, [{}s] add doc", readTime / 1e-9, docAddTime / 1e-9);
+            logger.debug("Index thread times: [{}ms] read, [{}ms] add doc", readTime / 1_000_000, docAddTime / 1_000_000);
         }
 
         private void _run() throws IOException {

x-pack/plugin/gpu/src/main/java/org/elasticsearch/xpack/gpu/codec/CuVSResourceManager.java

@@ -183,7 +183,7 @@ public ManagedCuVSResources acquire(int numVectors, int dims, CuVSMatrix.DataTyp
                     }
                 }
                 var elapsed = started - System.nanoTime();
-                logger.debug("Resource acquired in [{}ms]", elapsed / 1e-6);
+                logger.debug("Resource acquired in [{}ms]", elapsed / 1_000_000.0);
                 res.locked = true;
                 return res;
             } finally {

x-pack/plugin/gpu/src/main/java/org/elasticsearch/xpack/gpu/codec/ES92GpuHnswVectorsWriter.java

@@ -170,7 +170,7 @@ public void flush(int maxDoc, Sorter.DocMap sortMap) throws IOException {
             throw new IOException("Failed to flush GPU index: ", t);
         }
         var elapsed = started - System.nanoTime();
-        logger.debug("Flush total time [{}ms]", elapsed / 1e-6);
+        logger.debug("Flush total time [{}ms]", elapsed / 1_000_000.0);
     }
 
     private void flushFieldsWithoutMemoryMappedFile(Sorter.DocMap sortMap) throws IOException, InterruptedException {
@@ -210,7 +210,7 @@ private void flushFieldsWithoutMemoryMappedFile(Sorter.DocMap sortMap) throws IO
                 }
             }
             var elapsed = started - System.nanoTime();
-            logger.debug("Flushed [{}] vectors in [{}ms]", numVectors, elapsed / 1e-6);
+            logger.debug("Flushed [{}] vectors in [{}ms]", numVectors, elapsed / 1_000_000.0);
         }
     }
 
@@ -534,7 +534,7 @@ public void mergeOneField(FieldInfo fieldInfo, MergeState mergeState) throws IOE
             deleteFilesIgnoringExceptions(mergeState.segmentInfo.dir, tempRawVectorsFileName);
         }
         var elapsed = started - System.nanoTime();
-        logger.debug("Merged [{}] vectors in [{}ms]", numVectors, elapsed / 1e-6);
+        logger.debug("Merged [{}] vectors in [{}ms]", numVectors, elapsed / 1_000_000.0);
     }
 
     private ByteVectorValues getMergedByteVectorValues(FieldInfo fieldInfo, MergeState mergeState) throws IOException {