iotests: Lower 064's memory usage

Test 064 reads a lot of data at once which currently results in qemu-io
having to allocate up to about 1 GB of memory (958 MB, to be exact).
This patch lowers that amount to 128 MB by making the test read smaller
chunks.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Jeff Cody <jcody@redhat.com>
Message-id: 1422025185-25229-1-git-send-email-mreitz@redhat.com

tests/qemu-iotests/064

@@ -54,7 +54,15 @@ $QEMU_IO -r -c "read -pP 0x96 33M 33M" "$TEST_IMG" | _filter_qemu_io
 
 echo
 echo "=== Verify pattern 0x00, 66M - 1024M ==="
-$QEMU_IO -r -c "read -pP 0x00 66M 958M" "$TEST_IMG" | _filter_qemu_io
+$QEMU_IO -r -c "read -pP 0x00 66M 62M" \
+            -c "read -pP 0x00 128M 128M" \
+            -c "read -pP 0x00 256M 128M" \
+            -c "read -pP 0x00 384M 128M" \
+            -c "read -pP 0x00 512M 128M" \
+            -c "read -pP 0x00 640M 128M" \
+            -c "read -pP 0x00 768M 128M" \
+            -c "read -pP 0x00 896M 128M" \
+            "$TEST_IMG" | _filter_qemu_io
 
 echo
 echo "=== Verify pattern write, 0xc3 99M-157M ==="
@@ -63,7 +71,14 @@ $QEMU_IO -c "write -pP 0xc3 99M 58M" "$TEST_IMG" | _filter_qemu_io
 $QEMU_IO -c "read -pP 0xa5 0 33M" "$TEST_IMG" | _filter_qemu_io
 $QEMU_IO -c "read -pP 0x96 33M 33M" "$TEST_IMG" | _filter_qemu_io
 $QEMU_IO -c "read -pP 0x00 66M 33M" "$TEST_IMG" | _filter_qemu_io
-$QEMU_IO -c "read -pP 0x00 157MM 867MM" "$TEST_IMG" | _filter_qemu_io
+$QEMU_IO -c "read -pP 0x00 157M 99M" \
+         -c "read -pP 0x00 256M 128M" \
+         -c "read -pP 0x00 384M 128M" \
+         -c "read -pP 0x00 512M 128M" \
+         -c "read -pP 0x00 640M 128M" \
+         -c "read -pP 0x00 768M 128M" \
+         -c "read -pP 0x00 896M 128M" \
+         "$TEST_IMG" | _filter_qemu_io
 # now verify what we should have actually written
 $QEMU_IO -c "read -pP 0xc3 99M 58M" "$TEST_IMG" | _filter_qemu_io
 

tests/qemu-iotests/064.out

@@ -9,8 +9,22 @@ read 34603008/34603008 bytes at offset 34603008
 33 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 
 === Verify pattern 0x00, 66M - 1024M ===
-read 1004535808/1004535808 bytes at offset 69206016
-958 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 65011712/65011712 bytes at offset 69206016
+62 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 134217728/134217728 bytes at offset 134217728
+128 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 134217728/134217728 bytes at offset 268435456
+128 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 134217728/134217728 bytes at offset 402653184
+128 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 134217728/134217728 bytes at offset 536870912
+128 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 134217728/134217728 bytes at offset 671088640
+128 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 134217728/134217728 bytes at offset 805306368
+128 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 134217728/134217728 bytes at offset 939524096
+128 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 
 === Verify pattern write, 0xc3 99M-157M ===
 wrote 60817408/60817408 bytes at offset 103809024
@@ -21,8 +35,20 @@ read 34603008/34603008 bytes at offset 34603008
 33 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 read 34603008/34603008 bytes at offset 69206016
 33 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-read 909115392/909115392 bytes at offset 164626432
-867 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 103809024/103809024 bytes at offset 164626432
+99 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 134217728/134217728 bytes at offset 268435456
+128 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 134217728/134217728 bytes at offset 402653184
+128 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 134217728/134217728 bytes at offset 536870912
+128 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 134217728/134217728 bytes at offset 671088640
+128 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 134217728/134217728 bytes at offset 805306368
+128 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 134217728/134217728 bytes at offset 939524096
+128 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 read 60817408/60817408 bytes at offset 103809024
 58 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 *** done