[LTP] [RFC PATCH] rm unused controllers/io-throttle tests

[Richard Palethorpe <rpalethorpe@suse.com>]

These files do not appear in any runtest file nor are they called from
anywhere else.

Signed-off-by: Richard Palethorpe <rpalethorpe@suse.com>
---

.../kernel/controllers/io-throttle/.gitignore |   1 -
 .../kernel/controllers/io-throttle/Makefile   |  32 --
 .../kernel/controllers/io-throttle/README     |  56 ----
 .../io-throttle/io_throttle_testplan.txt      |  36 ---
 .../kernel/controllers/io-throttle/iobw.c     | 281 ------------------
 .../controllers/io-throttle/myfunctions-io.sh |  61 ----
 .../io-throttle/run_io_throttle_test.sh       | 123 --------
 7 files changed, 590 deletions(-)
 delete mode 100644 testcases/kernel/controllers/io-throttle/.gitignore
 delete mode 100644 testcases/kernel/controllers/io-throttle/Makefile
 delete mode 100644 testcases/kernel/controllers/io-throttle/README
 delete mode 100644 testcases/kernel/controllers/io-throttle/io_throttle_testplan.txt
 delete mode 100644 testcases/kernel/controllers/io-throttle/iobw.c
 delete mode 100755 testcases/kernel/controllers/io-throttle/myfunctions-io.sh
 delete mode 100755 testcases/kernel/controllers/io-throttle/run_io_throttle_test.sh

diff --git a/testcases/kernel/controllers/io-throttle/.gitignore b/testcases/kernel/controllers/io-throttle/.gitignore
deleted file mode 100644
index 6836f7b74..000000000
--- a/testcases/kernel/controllers/io-throttle/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-/iobw
diff --git a/testcases/kernel/controllers/io-throttle/Makefile b/testcases/kernel/controllers/io-throttle/Makefile
deleted file mode 100644
index ceeba7362..000000000
--- a/testcases/kernel/controllers/io-throttle/Makefile
+++ /dev/null
@@ -1,32 +0,0 @@
-#
-#    kernel/controllers/io-throttle testcase suite Makefile.
-#
-#    Copyright (C) 2009, Cisco Systems 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 2 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, write to the Free Software Foundation, Inc.,
-#    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
-#
-# Ngie Cooper, July 2009
-#
-
-top_srcdir		?= ../../../..
-
-include $(top_srcdir)/include/mk/testcases.mk
-include $(abs_srcdir)/../Makefile.inc
-
-INSTALL_TARGETS		:=  run_io_throttle_test.sh myfunctions-io.sh
-
-LDLIBS			+= -lm -lcontrollers
-
-include $(top_srcdir)/include/mk/generic_leaf_target.mk
diff --git a/testcases/kernel/controllers/io-throttle/README b/testcases/kernel/controllers/io-throttle/README
deleted file mode 100644
index e5980fb6c..000000000
--- a/testcases/kernel/controllers/io-throttle/README
+++ /dev/null
@@ -1,56 +0,0 @@
-TEST SUITE:
-
-The directory io-throttle contains the tests related to block device I/O
-bandwdith controller.
-
-More testcases are expected to be added in future.
-
-TESTS AIM:
-
-The aim of the tests is to check the block device I/O throttling functionality
-for cgroups.
-
-FILES DESCRIPTION:
-
-iobw.c
----------------
-Simple benchmark to generate parallel streams of direct I/O (O_DIRECT). This
-benchmark fork()s one task per stream. Each task creates a separate file in the
-current working directory, fills it with data using O_DIRECT writes and re-read
-the whole file always in O_DIRECT mode. Different timestamps are used to
-evaluate per-task I/O rate and total I/O rate (seen by the parent).
-
-myfunctions.sh
-----------
-This file contains the functions which are common for the io-throttle tests.
-For ex.  the setup and cleanup functions which do the setup for running the
-test and do the cleanup once the test finishes. The setup() function creates
-/dev/blockioctl directory and mounts cgroup filesystem on it with memory
-controller. It then creates a number(n) of groups in /dev/blockioctl. The
-cleanup function does a complete cleanup of the system.
-
-Most of the error scenarios have been taken care of for a sane cleanup of the
-system. However if cleanup fails in any case, just manually execute the
-commands written in cleanup function in myfunctions.sh.
-One of the most common causes of failed cleanup is that you have done cd into
-any of the groups in controller dir tree.
-
-run_io_throttle_test.sh
-------------------
-This script creates different scenarios for I/O bandwidth controller testing
-and fires (n) tasks in different groups to write and read different I/O streams
-etc. It waits for the return status from tasks and reports test pass/fail
-accordingly.
-
-Makefile
---------
-The usual makefile for this directory
-
-PASS/FAIL CRITERION:
-==================
-The test cases are intelligent enough in deciding the pass or failure of a
-test.
-
-README:
---------
-This file.
diff --git a/testcases/kernel/controllers/io-throttle/io_throttle_testplan.txt b/testcases/kernel/controllers/io-throttle/io_throttle_testplan.txt
deleted file mode 100644
index fa5b85b42..000000000
--- a/testcases/kernel/controllers/io-throttle/io_throttle_testplan.txt
+++ /dev/null
@@ -1,36 +0,0 @@
-The I/O bandwidth controller testplan includes a complete set of testcases to
-verify the effectiveness of the block device I/O throttling capabilities for
-cgroups.
-
-I/O bandwidth limitations are imposed by the testcase script and verified doing
-I/O activity on a limited block device. Tests are supposed to be passed if the
-I/O rates of all the different workloads always respect the I/O limitations.
-
-TESTCASE DESCRIPTION:
-====================
-First of all we evaluate the physical I/O bandwidth (physical-io-bw) of the
-block device where the current working directory resides.
-
-Based on the physical I/O bandwidth three cgroups are created: cgroup-1,
-cgroup-2, cgroup-3. Cgroups use respectively the following I/O bandwidth
-limitations:
-- cgroup-1: physical-io-bw / 2
-- cgroup-2: physical-io-bw / 4
-- cgroup-3: physical-io-bw / 8
-
-Each test is considered passed only if the I/O limitations above are respected.
-
-Currently the following different scenarios are tested:
-- 1 single stream per cgroup using leaky-bucket I/O throttling
-- 1 single stream per cgroup using token-bucket I/O throttling
-- 2 parallel streams per cgroup using leaky-bucket I/O throttling
-- 2 parallel streams per cgroup using token-bucket I/O throttling
-- 4 parallel streams per cgroup using leaky-bucket I/O throttling
-- 4 parallel streams per cgroup using token-bucket I/O throttling
-
-For any other information please refer to
-Documentation/controllers/io-throttle.txt in kernel documentation.
-
-Questions?
-----------
-Send email to: righi.andrea@gmail.com
diff --git a/testcases/kernel/controllers/io-throttle/iobw.c b/testcases/kernel/controllers/io-throttle/iobw.c
deleted file mode 100644
index e4d9c9bb6..000000000
--- a/testcases/kernel/controllers/io-throttle/iobw.c
+++ /dev/null
@@ -1,281 +0,0 @@
-/*
- * iobw.c - simple I/O bandwidth benchmark
- *
- * 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 2 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, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
- *
- * Copyright (C) 2008 Andrea Righi <righi.andrea@gmail.com>
- */
-
-#define _GNU_SOURCE
-#define __USE_GNU
-
-#include <errno.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <fcntl.h>
-#include <signal.h>
-#include <string.h>
-#include <unistd.h>
-#include <limits.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <sys/time.h>
-#include <sys/wait.h>
-
-#ifndef PAGE_SIZE
-#define PAGE_SIZE sysconf(_SC_PAGE_SIZE)
-#endif
-
-#define align(x,a)		__align_mask(x,(typeof(x))(a)-1)
-#define __align_mask(x,mask)	(((x)+(mask))&~(mask))
-#define kb(x)			((x) >> 10)
-
-const char usage[] = "Usage: iobw [-direct] threads chunk_size data_size\n";
-const char child_fmt[] = "(%s) task %3d: time %4lu.%03lu bw %7lu KiB/s (%s)\n";
-const char parent_fmt[] =
-    "(%s) parent %d: time %4lu.%03lu bw %7lu KiB/s (%s)\n";
-
-static int directio = 0;
-static size_t data_size = 0;
-static size_t chunk_size = 0;
-
-typedef enum {
-	OP_WRITE,
-	OP_READ,
-	NUM_IOPS,
-} iops_t;
-
-static const char *iops[] = {
-	"WRITE",
-	"READ ",
-	"TOTAL",
-};
-
-static int threads;
-pid_t *children;
-
-char *mygroup;
-
-static void print_results(int id, iops_t op, size_t bytes, struct timeval *diff)
-{
-	fprintf(stdout, id ? child_fmt : parent_fmt,
-		mygroup, id, diff->tv_sec, diff->tv_usec / 1000,
-		(bytes / (diff->tv_sec * 1000000L + diff->tv_usec))
-		* 1000000L / 1024, iops[op]);
-}
-
-static void thread(int id)
-{
-	struct timeval start, stop, diff;
-	int fd, i, ret;
-	size_t n;
-	void *buf;
-	int flags = O_CREAT | O_RDWR | O_LARGEFILE;
-	char filename[32];
-
-	ret = posix_memalign(&buf, PAGE_SIZE, chunk_size);
-	if (ret < 0) {
-		fprintf(stderr,
-			"ERROR: task %d couldn't allocate %zu bytes (%s)\n",
-			id, chunk_size, strerror(errno));
-		exit(1);
-	}
-	memset(buf, 0xaa, chunk_size);
-
-	snprintf(filename, sizeof(filename), "%s-%d-iobw.tmp", mygroup, id);
-	if (directio)
-		flags |= O_DIRECT;
-	fd = open(filename, flags, 0600);
-	if (fd < 0) {
-		fprintf(stderr, "ERROR: task %d couldn't open %s (%s)\n",
-			id, filename, strerror(errno));
-		free(buf);
-		exit(1);
-	}
-
-	/* Write */
-	lseek(fd, 0, SEEK_SET);
-	n = 0;
-	gettimeofday(&start, NULL);
-	while (n < data_size) {
-		i = write(fd, buf, chunk_size);
-		if (i < 0) {
-			fprintf(stderr, "ERROR: task %d writing to %s (%s)\n",
-				id, filename, strerror(errno));
-			ret = 1;
-			goto out;
-		}
-		n += i;
-	}
-	gettimeofday(&stop, NULL);
-	timersub(&stop, &start, &diff);
-	print_results(id + 1, OP_WRITE, data_size, &diff);
-
-	/* Read */
-	lseek(fd, 0, SEEK_SET);
-	n = 0;
-	gettimeofday(&start, NULL);
-	while (n < data_size) {
-		i = read(fd, buf, chunk_size);
-		if (i < 0) {
-			fprintf(stderr, "ERROR: task %d reading to %s (%s)\n",
-				id, filename, strerror(errno));
-			ret = 1;
-			goto out;
-		}
-		n += i;
-	}
-	gettimeofday(&stop, NULL);
-	timersub(&stop, &start, &diff);
-	print_results(id + 1, OP_READ, data_size, &diff);
-out:
-	close(fd);
-	unlink(filename);
-	free(buf);
-	exit(ret);
-}
-
-static void spawn(int id)
-{
-	pid_t pid;
-
-	pid = fork();
-	switch (pid) {
-	case -1:
-		fprintf(stderr, "ERROR: couldn't fork thread %d\n", id);
-		exit(1);
-	case 0:
-		thread(id);
-	default:
-		children[id] = pid;
-	}
-}
-
-void signal_handler(int sig)
-{
-	char filename[32];
-	int i;
-
-	for (i = 0; i < threads; i++)
-		if (children[i])
-			kill(children[i], SIGKILL);
-
-	for (i = 0; i < threads; i++) {
-		struct stat mystat;
-
-		snprintf(filename, sizeof(filename), "%s-%d-iobw.tmp",
-			 mygroup, i);
-		if (stat(filename, &mystat) < 0)
-			continue;
-		unlink(filename);
-	}
-
-	fprintf(stdout, "received signal %d, exiting\n", sig);
-	exit(0);
-}
-
-unsigned long long memparse(char *ptr, char **retptr)
-{
-	unsigned long long ret = strtoull(ptr, retptr, 0);
-
-	switch (**retptr) {
-	case 'G':
-	case 'g':
-		ret <<= 10;
-	case 'M':
-	case 'm':
-		ret <<= 10;
-	case 'K':
-	case 'k':
-		ret <<= 10;
-		(*retptr)++;
-	default:
-		break;
-	}
-	return ret;
-}
-
-int main(int argc, char *argv[])
-{
-	struct timeval start, stop, diff;
-	char *end;
-	int i;
-
-	if (argv[1] && strcmp(argv[1], "-direct") == 0) {
-		directio = 1;
-		argc--;
-		argv++;
-	}
-	if (argc != 4) {
-		fprintf(stderr, usage);
-		exit(1);
-	}
-	if ((threads = atoi(argv[1])) == 0) {
-		fprintf(stderr, usage);
-		exit(1);
-	}
-	chunk_size = align(memparse(argv[2], &end), PAGE_SIZE);
-	if (*end) {
-		fprintf(stderr, usage);
-		exit(1);
-	}
-	data_size = align(memparse(argv[3], &end), PAGE_SIZE);
-	if (*end) {
-		fprintf(stderr, usage);
-		exit(1);
-	}
-
-	/* retrieve group name */
-	mygroup = getenv("MYGROUP");
-	if (!mygroup) {
-		fprintf(stderr,
-			"ERROR: undefined environment variable MYGROUP\n");
-		exit(1);
-	}
-
-	children = malloc(sizeof(pid_t) * threads);
-	if (!children) {
-		fprintf(stderr, "ERROR: not enough memory\n");
-		exit(1);
-	}
-
-	/* handle user interrupt */
-	signal(SIGINT, signal_handler);
-	/* handle kill from shell */
-	signal(SIGTERM, signal_handler);
-
-	fprintf(stdout, "chunk_size %zuKiB, data_size %zuKiB\n",
-		kb(chunk_size), kb(data_size));
-	fflush(stdout);
-
-	gettimeofday(&start, NULL);
-	for (i = 0; i < threads; i++)
-		spawn(i);
-	for (i = 0; i < threads; i++) {
-		int status;
-		wait(&status);
-		if (!WIFEXITED(status))
-			exit(1);
-	}
-	gettimeofday(&stop, NULL);
-
-	timersub(&stop, &start, &diff);
-	print_results(0, NUM_IOPS, data_size * threads * NUM_IOPS, &diff);
-	fflush(stdout);
-	free(children);
-
-	exit(0);
-}
diff --git a/testcases/kernel/controllers/io-throttle/myfunctions-io.sh b/testcases/kernel/controllers/io-throttle/myfunctions-io.sh
deleted file mode 100755
index bf4bb2b9a..000000000
--- a/testcases/kernel/controllers/io-throttle/myfunctions-io.sh
+++ /dev/null
@@ -1,61 +0,0 @@
-#!/bin/sh
-#
-# 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 2 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, write to the
-# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-# Boston, MA 021110-1307, USA.
-#
-# Copyright (C) 2008 Andrea Righi <righi.andrea@gmail.com>
-#
-# usage . myfunctions.sh
-
-setup()
-{
-	# create testcase cgroups
-	if [ -e /dev/blockioctl ]; then
-		echo "WARN: /dev/blockioctl already exist! overwriting."
-		cleanup
-	fi
-	mkdir /dev/blockioctl
-	mount -t cgroup -o blockio cgroup /dev/blockioctl
-	if [ $? -ne 0 ]; then
-		echo "ERROR: could not mount cgroup filesystem " \
-			" on /dev/blockioctl. Exiting test."
-		cleanup
-		exit 1
-	fi
-	for i in `seq 1 3`; do
-		if [ -e /dev/blockioctl/cgroup-$i ]; then
-			rmdir /dev/blockioctl/cgroup-$i
-			echo "WARN: earlier cgroup-$i found and removed"
-		fi
-		mkdir /dev/blockioctl/cgroup-$i
-		if [ $? -ne 0 ]; then
-			echo "ERROR: could not create cgroup-$i" \
-				"Check your permissions. Exiting test."
-			cleanup
-			exit 1
-		fi
-	done
-}
-
-cleanup()
-{
-	echo "Cleanup called"
-	for i in `seq 1 3`; do
-		rmdir /dev/blockioctl/cgroup-$i
-		rm -f /tmp/cgroup-$i.out
-	done
-	umount /dev/blockioctl
-	rmdir /dev/blockioctl
-}
diff --git a/testcases/kernel/controllers/io-throttle/run_io_throttle_test.sh b/testcases/kernel/controllers/io-throttle/run_io_throttle_test.sh
deleted file mode 100755
index c855fd052..000000000
--- a/testcases/kernel/controllers/io-throttle/run_io_throttle_test.sh
+++ /dev/null
@@ -1,123 +0,0 @@
-#!/bin/bash
-#
-# 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 2 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, write to the
-# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-# Boston, MA 021110-1307, USA.
-#
-# Copyright (C) 2008 Andrea Righi <righi.andrea@gmail.com>
-#
-# Usage: ./run_io_throttle_test.sh
-# Description: test block device I/O bandwidth controller functionalities
-
-. ./myfunctions-io.sh
-
-trap cleanup SIGINT
-
-BUFSIZE=16m
-DATASIZE=64m
-
-setup
-
-# get the device name of the entire mounted block device
-dev=`df -P . | sed '1d' | cut -d' ' -f1 | sed 's/[p]*[0-9]*$//'`
-
-# evaluate device bandwidth
-export MYGROUP=
-phys_bw=`./iobw -direct 1 $BUFSIZE $DATASIZE | grep TOTAL | awk '{print $7}'`
-if [ $? -ne 0 ]; then
-	echo "ERROR: could not evaluate i/o bandwidth of $dev. Exiting test."
-	cleanup
-	exit 1
-fi
-echo ">> physical i/o bandwidth limit is: $phys_bw KiB/s"
-# show cgroup i/o bandwidth limits
-for i in `seq 1 3`; do
-	MYGROUP=cgroup-$i
-	echo "($MYGROUP) max i/o bw: " \
-		"$(($phys_bw / `echo 2^$i | bc`)) KiB/s + O_DIRECT"
-done
-
-for tasks in 1 2 4; do
-for strategy in 0 1; do
-	# set bw limiting rules
-	if [ -f /dev/blockioctl/blockio.bandwidth ]; then
-		io_throttle_file=blockio.bandwidth
-	elif [ -f /dev/blockioctl/blockio.bandwidth-max ]; then
-		io_throttle_file=blockio.bandwidth-max
-	else
-		echo "ERROR: unknown kernel ABI. Exiting test."
-		cleanup
-		exit 1
-	fi
-	for i in `seq 1 3`; do
-		limit=$(($phys_bw * 1024 / `echo 2^$i | bc`))
-		IOBW[$i]=$(($limit / 1024))
-		/bin/echo $dev:$limit:$strategy:$limit > \
-			/dev/blockioctl/cgroup-$i/${io_throttle_file}
-		if [ $? -ne 0 ]; then
-			echo "ERROR: could not set i/o bandwidth limit for cgroup-$i. Exiting test."
-			cleanup
-			exit 1
-		fi
-	done
-
-	# run benchmark
-	if [ $tasks -eq 1 ]; then
-		stream="stream"
-	else
-		stream="streams"
-	fi
-	echo -n ">> testing $tasks parallel $stream per cgroup "
-	if [ $strategy -eq 0 ]; then
-		echo "(leaky-bucket i/o throttling)"
-	else
-		echo "(token-bucket i/o throttling)"
-	fi
-	for i in `seq 1 3`; do
-		MYGROUP=cgroup-$i
-		/bin/echo $$ > /dev/blockioctl/$MYGROUP/tasks
-		if [ $? -ne 0 ]; then
-			echo "ERROR: could not set i/o bandwidth limit for cgroup-$i. Exiting test."
-			cleanup
-			exit 1
-		fi
-		# exec i/o benchmark
-		./iobw -direct $tasks $BUFSIZE $DATASIZE > /tmp/$MYGROUP.out &
-		PID[$i]=$!
-	done
-	/bin/echo $$ > /dev/blockioctl/tasks
-
-	# wait for children completion
-	for i in `seq 1 3`; do
-		MYGROUP=cgroup-$i
-		wait ${PID[$i]}
-		ret=$?
-		if [ $ret -ne 0 ]; then
-			echo "ERROR: error code $ret during test $tasks.$strategy.$i. Exiting test."
-			cleanup
-			exit 1
-		fi
-		iorate=`grep parent /tmp/${MYGROUP}.out | awk '{print $7}'`
-		diff=$((${IOBW[$i]} - $iorate))
-		echo "($MYGROUP) i/o-bw ${IOBW[$i]} KiB/s, i/o-rate $iorate KiB/s, err $diff KiB/s"
-		if [ ${IOBW[$i]} -ge $iorate ]; then
-			echo "TPASS   Block device I/O bandwidth controller: test $tasks.$strategy.$i PASSED";
-		else
-			echo "TFAIL   Block device I/O bandwidth controller: test $tasks.$strategy.$i FAILED";
-		fi
-	done
-done
-done
-
-cleanup
-- 
2.31.1