[PATCH] tests: add one: create 60 partitions on a scsi device

[Jim Meyering]

FYI, here's a new test case.
For reference, when I run this on F13, it takes about 15 seconds
to create its 60 partitions.

>From 246c953b53c1bd49b1f835f84a1ca29a6d2fbc1c Mon Sep 17 00:00:00 2001
From: Jim Meyering <address@hidden>
Date: Thu, 6 May 2010 14:11:33 +0200
Subject: [PATCH] tests: add one: create 60 partitions on a scsi device

* tests/t9040-many-partitions.sh: New test.
* tests/Makefile.am (TESTS): Add it.
(TESTS_ENVIRONMENT): Export AWK to test scripts.
Inspired by the report of a many-partition test
taking far longer on RHEL5 than on RHEL4 in
http://bugzilla.redhat.com/589117
---
 tests/Makefile.am              |    4 ++-
 tests/t9040-many-partitions.sh |   78 ++++++++++++++++++++++++++++++++++++++++
 2 files changed, 81 insertions(+), 1 deletions(-)
 create mode 100644 tests/t9040-many-partitions.sh

diff --git a/tests/Makefile.am b/tests/Makefile.am
index 21fead4..aa67f99 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -42,7 +42,8 @@ TESTS = \
   t9010-big-sector.sh \
   t9020-alignment.sh \
   t9021-maxima.sh \
-  t9030-align-check.sh
+  t9030-align-check.sh \
+  t9040-many-partitions.sh

 EXTRA_DIST = \
   $(TESTS) test-lib.sh t-lib.sh lvm-utils.sh t-local.sh t-lvm.sh init.sh
@@ -100,6 +101,7 @@ TESTS_ENVIRONMENT =                         \
   built_programs=parted                                \
   srcdir='$(srcdir)'                           \
   top_srcdir='$(top_srcdir)'                   \
+  AWK='$(AWK)'                                 \
   CC='$(CC)'                                   \
   MAKE=$(MAKE)                                 \
   PACKAGE_BUGREPORT='$(PACKAGE_BUGREPORT)'     \
diff --git a/tests/t9040-many-partitions.sh b/tests/t9040-many-partitions.sh
new file mode 100644
index 0000000..0afc315
--- /dev/null
+++ b/tests/t9040-many-partitions.sh
@@ -0,0 +1,78 @@
+#!/bin/sh
+# Ensure that creating many partitions works.
+
+# Copyright (C) 2010 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+if test "$VERBOSE" = yes; then
+  set -x
+  parted --version
+fi
+
+: ${srcdir=.}
+. $srcdir/t-lib.sh
+
+require_root_
+require_scsi_debug_module_
+
+# check for scsi_debug module
+modprobe -n scsi_debug ||
+  skip_test_ "you lack the scsi_debug kernel module"
+
+grep '^#define USE_BLKID 1' "$CONFIG_HEADER" > /dev/null ||
+  skip_test_ 'this system lacks a new-enough libblkid'
+
+ss=$sector_size_
+partition_sectors=256  # sectors per partition
+n_partitions=60        # how many partitions to create
+start=2048             # start sector for the first partition
+gpt_slop=34            # sectors at end of disk reserved for GPT
+
+n_sectors=$(($start + n_partitions * partition_sectors + gpt_slop))
+
+sectors_per_MiB=$((1024 * 1024 / ss))
+n_MiB=$(((n_sectors + sectors_per_MiB - 1) / sectors_per_MiB))
+# create memory-backed device
+scsi_debug_setup_ dev_size_mb=$n_MiB > dev-name ||
+  skip_test_ 'failed to create scsi_debug device'
+scsi_dev=$(cat dev-name)
+
+fail=0
+
+n=$((n_MiB * sectors_per_MiB))
+printf "BYT;\n$scsi_dev:${n}s:scsi:$ss:$ss:gpt:Linux scsi_debug;\n" \
+  > exp || fail=1
+
+parted -s $scsi_dev mklabel gpt || fail=1
+parted -s $scsi_dev u s p || fail=1
+
+i=1
+t0=$(date +%s.%N)
+while :; do
+    end=$((start + partition_sectors - 1))
+    parted -s $scsi_dev mkpart p$i ${start}s ${end}s || fail=1
+    printf "$i:${start}s:${end}s:${partition_sectors}s::p$i:;\n" >> exp
+    test $i = $n_partitions && break
+    start=$((start + partition_sectors))
+    i=$((i+1))
+done
+t_final=$(date +%s.%N)
+$AWK 'BEGIN {printf "created %d partitions in %.2f seconds\n",'\
+"$n_partitions, $t_final - $t0 }" /dev/null
+
+parted -m -s $scsi_dev u s p > out || fail=1
+compare out exp || fail=1
+
+Exit $fail
--
1.7.1.166.gf2086