From patchwork Mon Dec 8 12:50:17 2008 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Artem Bityutskiy X-Patchwork-Id: 12702 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 6AD0ADDEDF for ; Mon, 8 Dec 2008 22:18:12 +1100 (EST) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.68 #1 (Red Hat Linux)) id 1L9e6b-0006fZ-M7; Mon, 08 Dec 2008 11:16:49 +0000 Received: from smtp.nokia.com ([192.100.105.134] helo=mgw-mx09.nokia.com) by bombadil.infradead.org with esmtps (Exim 4.68 #1 (Red Hat Linux)) id 1L9e5C-0000JB-Hf; Mon, 08 Dec 2008 11:15:23 +0000 Received: from esebh105.NOE.Nokia.com (esebh105.ntc.nokia.com [172.21.138.211]) by mgw-mx09.nokia.com (Switch-3.2.6/Switch-3.2.6) with ESMTP id mB8BETmH009813; Mon, 8 Dec 2008 05:15:20 -0600 Received: from vaebh104.NOE.Nokia.com ([10.160.244.30]) by esebh105.NOE.Nokia.com with Microsoft SMTPSVC(6.0.3790.3959); Mon, 8 Dec 2008 13:15:11 +0200 Received: from mgw-int01.ntc.nokia.com ([172.21.143.96]) by vaebh104.NOE.Nokia.com over TLS secured channel with Microsoft SMTPSVC(6.0.3790.3959); Mon, 8 Dec 2008 13:15:11 +0200 Received: from localhost.localdomain (esdhcp041108.research.nokia.com [172.21.41.108]) by mgw-int01.ntc.nokia.com (Switch-3.2.5/Switch-3.2.5) with ESMTP id mB8BF4Dc029625; Mon, 8 Dec 2008 13:15:10 +0200 From: Artem Bityutskiy To: David Woodhouse Subject: [PATCH] MTD: tests: add mtd_speedtest Date: Mon, 8 Dec 2008 14:50:17 +0200 Message-Id: <1228740621-15197-5-git-send-email-dedekind@infradead.org> X-Mailer: git-send-email 1.5.4.1 In-Reply-To: <1228740621-15197-1-git-send-email-dedekind@infradead.org> References: <1228740621-15197-1-git-send-email-dedekind@infradead.org> X-OriginalArrivalTime: 08 Dec 2008 11:15:11.0314 (UTC) FILETIME=[3C5D3320:01C95926] X-Nokia-AV: Clean X-Bad-Reply: References and In-Reply-To but no 'Re:' in Subject. X-Spam-Score: -4.0 (----) X-Spam-Report: SpamAssassin version 3.2.5 on bombadil.infradead.org summary: Content analysis details: (-4.0 points) pts rule name description ---- ---------------------- -------------------------------------------------- -4.0 RCVD_IN_DNSWL_MED RBL: Sender listed at http://www.dnswl.org/, medium trust [192.100.105.134 listed in list.dnswl.org] X-Mailman-Approved-At: Mon, 08 Dec 2008 06:16:48 -0500 Cc: linux-mtd@lists.infradead.org X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.9 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: linux-mtd-bounces@lists.infradead.org Errors-To: linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org From: Artem Bityutskiy This test examines I/O speed of the flash device. Signed-off-by: Artem Bityutskiy --- drivers/mtd/tests/mtd_speedtest.c | 502 +++++++++++++++++++++++++++++++++++++ 1 files changed, 502 insertions(+), 0 deletions(-) create mode 100644 drivers/mtd/tests/mtd_speedtest.c diff --git a/drivers/mtd/tests/mtd_speedtest.c b/drivers/mtd/tests/mtd_speedtest.c new file mode 100644 index 0000000..141363a --- /dev/null +++ b/drivers/mtd/tests/mtd_speedtest.c @@ -0,0 +1,502 @@ +/* + * Copyright (C) 2007 Nokia Corporation + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published by + * the Free Software Foundation. + * + * 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; see the file COPYING. If not, write to the Free Software + * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + * Test read and write speed of a MTD device. + * + * Author: Adrian Hunter + */ + +#include +#include +#include +#include +#include +#include + +#define PRINT_PREF KERN_INFO "mtd_speedtest: " + +static int dev; +module_param(dev, int, S_IRUGO); +MODULE_PARM_DESC(dev, "MTD device number to use"); + +static struct mtd_info *mtd; +static unsigned char *iobuf; +static unsigned char *bbt; + +static int pgsize; +static int ebcnt; +static int pgcnt; +static int goodebcnt; +static struct timeval start, finish; +static unsigned long next = 1; + +static inline unsigned int simple_rand(void) +{ + next = next * 1103515245 + 12345; + return (unsigned int)((next / 65536) % 32768); +} + +static inline void simple_srand(unsigned long seed) +{ + next = seed; +} + +static void set_random_data(unsigned char *buf, size_t len) +{ + size_t i; + + for (i = 0; i < len; ++i) + buf[i] = simple_rand(); +} + +static int erase_eraseblock(int ebnum) +{ + int err; + struct erase_info ei; + loff_t addr = ebnum * mtd->erasesize; + + memset(&ei, 0, sizeof(struct erase_info)); + ei.mtd = mtd; + ei.addr = addr; + ei.len = mtd->erasesize; + + err = mtd->erase(mtd, &ei); + if (err) { + printk(PRINT_PREF "error %d while erasing EB %d\n", err, ebnum); + return err; + } + + if (ei.state == MTD_ERASE_FAILED) { + printk(PRINT_PREF "some erase error occurred at EB %d\n", + ebnum); + return -EIO; + } + + return 0; +} + +static int erase_whole_device(void) +{ + int err; + unsigned int i; + + for (i = 0; i < ebcnt; ++i) { + if (bbt[i]) + continue; + err = erase_eraseblock(i); + if (err) + return err; + cond_resched(); + } + return 0; +} + +static int write_eraseblock(int ebnum) +{ + size_t written = 0; + int err = 0; + loff_t addr = ebnum * mtd->erasesize; + + err = mtd->write(mtd, addr, mtd->erasesize, &written, iobuf); + if (err || written != mtd->erasesize) { + printk(PRINT_PREF "error: write failed at %#llx\n", addr); + if (!err) + err = -EINVAL; + } + + return err; +} + +static int write_eraseblock_by_page(int ebnum) +{ + size_t written = 0; + int i, err = 0; + loff_t addr = ebnum * mtd->erasesize; + void *buf = iobuf; + + for (i = 0; i < pgcnt; i++) { + err = mtd->write(mtd, addr, pgsize, &written, buf); + if (err || written != pgsize) { + printk(PRINT_PREF "error: write failed at %#llx\n", + addr); + if (!err) + err = -EINVAL; + break; + } + addr += pgsize; + buf += pgsize; + } + + return err; +} + +static int write_eraseblock_by_2pages(int ebnum) +{ + size_t written = 0, sz = pgsize * 2; + int i, n = pgcnt / 2, err = 0; + loff_t addr = ebnum * mtd->erasesize; + void *buf = iobuf; + + for (i = 0; i < n; i++) { + err = mtd->write(mtd, addr, sz, &written, buf); + if (err || written != sz) { + printk(PRINT_PREF "error: write failed at %#llx\n", + addr); + if (!err) + err = -EINVAL; + return err; + } + addr += sz; + buf += sz; + } + if (pgcnt % 2) { + err = mtd->write(mtd, addr, pgsize, &written, buf); + if (err || written != pgsize) { + printk(PRINT_PREF "error: write failed at %#llx\n", + addr); + if (!err) + err = -EINVAL; + } + } + + return err; +} + +static int read_eraseblock(int ebnum) +{ + size_t read = 0; + int err = 0; + loff_t addr = ebnum * mtd->erasesize; + + err = mtd->read(mtd, addr, mtd->erasesize, &read, iobuf); + /* Ignore corrected ECC errors */ + if (err == -EUCLEAN) + err = 0; + if (err || read != mtd->erasesize) { + printk(PRINT_PREF "error: read failed at %#llx\n", addr); + if (!err) + err = -EINVAL; + } + + return err; +} + +static int read_eraseblock_by_page(int ebnum) +{ + size_t read = 0; + int i, err = 0; + loff_t addr = ebnum * mtd->erasesize; + void *buf = iobuf; + + for (i = 0; i < pgcnt; i++) { + err = mtd->read(mtd, addr, pgsize, &read, buf); + /* Ignore corrected ECC errors */ + if (err == -EUCLEAN) + err = 0; + if (err || read != pgsize) { + printk(PRINT_PREF "error: read failed at %#llx\n", + addr); + if (!err) + err = -EINVAL; + break; + } + addr += pgsize; + buf += pgsize; + } + + return err; +} + +static int read_eraseblock_by_2pages(int ebnum) +{ + size_t read = 0, sz = pgsize * 2; + int i, n = pgcnt / 2, err = 0; + loff_t addr = ebnum * mtd->erasesize; + void *buf = iobuf; + + for (i = 0; i < n; i++) { + err = mtd->read(mtd, addr, sz, &read, buf); + /* Ignore corrected ECC errors */ + if (err == -EUCLEAN) + err = 0; + if (err || read != sz) { + printk(PRINT_PREF "error: read failed at %#llx\n", + addr); + if (!err) + err = -EINVAL; + return err; + } + addr += sz; + buf += sz; + } + if (pgcnt % 2) { + err = mtd->read(mtd, addr, pgsize, &read, buf); + /* Ignore corrected ECC errors */ + if (err == -EUCLEAN) + err = 0; + if (err || read != pgsize) { + printk(PRINT_PREF "error: read failed at %#llx\n", + addr); + if (!err) + err = -EINVAL; + } + } + + return err; +} + +static int is_block_bad(int ebnum) +{ + loff_t addr = ebnum * mtd->erasesize; + int ret; + + ret = mtd->block_isbad(mtd, addr); + if (ret) + printk(PRINT_PREF "block %d is bad\n", ebnum); + return ret; +} + +static inline void start_timing(void) +{ + do_gettimeofday(&start); +} + +static inline void stop_timing(void) +{ + do_gettimeofday(&finish); +} + +static long calc_speed(void) +{ + long ms, k, speed; + + ms = (finish.tv_sec - start.tv_sec) * 1000 + + (finish.tv_usec - start.tv_usec) / 1000; + k = goodebcnt * mtd->erasesize / 1024; + speed = (k * 1000) / ms; + return speed; +} + +static int scan_for_bad_eraseblocks(void) +{ + int i, bad = 0; + + bbt = kmalloc(ebcnt, GFP_KERNEL); + if (!bbt) { + printk(PRINT_PREF "error: cannot allocate memory\n"); + return -ENOMEM; + } + memset(bbt, 0 , ebcnt); + + printk(PRINT_PREF "scanning for bad eraseblocks\n"); + for (i = 0; i < ebcnt; ++i) { + bbt[i] = is_block_bad(i) ? 1 : 0; + if (bbt[i]) + bad += 1; + cond_resched(); + } + printk(PRINT_PREF "scanned %d eraseblocks, %d are bad\n", i, bad); + goodebcnt = ebcnt - bad; + return 0; +} + +static int __init mtd_speedtest_init(void) +{ + int err, i; + long speed; + uint64_t tmp; + + printk(KERN_INFO "\n"); + printk(KERN_INFO "=================================================\n"); + printk(PRINT_PREF "MTD device: %d\n", dev); + + mtd = get_mtd_device(NULL, dev); + if (IS_ERR(mtd)) { + err = PTR_ERR(mtd); + printk(PRINT_PREF "error: cannot get MTD device\n"); + return err; + } + + if (mtd->writesize == 1) { + printk(PRINT_PREF "not NAND flash, assume page size is 512 " + "bytes.\n"); + pgsize = 512; + } else + pgsize = mtd->writesize; + + tmp = mtd->size; + do_div(tmp, mtd->erasesize); + ebcnt = tmp; + pgcnt = mtd->erasesize / mtd->writesize; + + printk(PRINT_PREF "MTD device size %llu, eraseblock size %u, " + "page size %u, count of eraseblocks %u, pages per " + "eraseblock %u, OOB size %u\n", + (unsigned long long)mtd->size, mtd->erasesize, + pgsize, ebcnt, pgcnt, mtd->oobsize); + + err = -ENOMEM; + iobuf = kmalloc(mtd->erasesize, GFP_KERNEL); + if (!iobuf) { + printk(PRINT_PREF "error: cannot allocate memory\n"); + goto out; + } + + simple_srand(1); + set_random_data(iobuf, mtd->erasesize); + + err = scan_for_bad_eraseblocks(); + if (err) + goto out; + + err = erase_whole_device(); + if (err) + goto out; + + /* Write all eraseblocks, 1 eraseblock at a time */ + printk(PRINT_PREF "testing eraseblock write speed\n"); + start_timing(); + for (i = 0; i < ebcnt; ++i) { + if (bbt[i]) + continue; + err = write_eraseblock(i); + if (err) + goto out; + cond_resched(); + } + stop_timing(); + speed = calc_speed(); + printk(PRINT_PREF "eraseblock write speed is %ld KiB/s\n", speed); + + /* Read all eraseblocks, 1 eraseblock at a time */ + printk(PRINT_PREF "testing eraseblock read speed\n"); + start_timing(); + for (i = 0; i < ebcnt; ++i) { + if (bbt[i]) + continue; + err = read_eraseblock(i); + if (err) + goto out; + cond_resched(); + } + stop_timing(); + speed = calc_speed(); + printk(PRINT_PREF "eraseblock read speed is %ld KiB/s\n", speed); + + err = erase_whole_device(); + if (err) + goto out; + + /* Write all eraseblocks, 1 page at a time */ + printk(PRINT_PREF "testing page write speed\n"); + start_timing(); + for (i = 0; i < ebcnt; ++i) { + if (bbt[i]) + continue; + err = write_eraseblock_by_page(i); + if (err) + goto out; + cond_resched(); + } + stop_timing(); + speed = calc_speed(); + printk(PRINT_PREF "page write speed is %ld KiB/s\n", speed); + + /* Read all eraseblocks, 1 page at a time */ + printk(PRINT_PREF "testing page read speed\n"); + start_timing(); + for (i = 0; i < ebcnt; ++i) { + if (bbt[i]) + continue; + err = read_eraseblock_by_page(i); + if (err) + goto out; + cond_resched(); + } + stop_timing(); + speed = calc_speed(); + printk(PRINT_PREF "page read speed is %ld KiB/s\n", speed); + + err = erase_whole_device(); + if (err) + goto out; + + /* Write all eraseblocks, 2 pages at a time */ + printk(PRINT_PREF "testing 2 page write speed\n"); + start_timing(); + for (i = 0; i < ebcnt; ++i) { + if (bbt[i]) + continue; + err = write_eraseblock_by_2pages(i); + if (err) + goto out; + cond_resched(); + } + stop_timing(); + speed = calc_speed(); + printk(PRINT_PREF "2 page write speed is %ld KiB/s\n", speed); + + /* Read all eraseblocks, 2 pages at a time */ + printk(PRINT_PREF "testing 2 page read speed\n"); + start_timing(); + for (i = 0; i < ebcnt; ++i) { + if (bbt[i]) + continue; + err = read_eraseblock_by_2pages(i); + if (err) + goto out; + cond_resched(); + } + stop_timing(); + speed = calc_speed(); + printk(PRINT_PREF "2 page read speed is %ld KiB/s\n", speed); + + /* Erase all eraseblocks */ + printk(PRINT_PREF "Testing erase speed\n"); + start_timing(); + for (i = 0; i < ebcnt; ++i) { + if (bbt[i]) + continue; + err = erase_eraseblock(i); + if (err) + goto out; + cond_resched(); + } + stop_timing(); + speed = calc_speed(); + printk(PRINT_PREF "erase speed is %ld KiB/s\n", speed); + + printk(PRINT_PREF "finished\n"); +out: + kfree(iobuf); + kfree(bbt); + put_mtd_device(mtd); + if (err) + printk(PRINT_PREF "error %d occurred\n", err); + printk(KERN_INFO "=================================================\n"); + return err; +} +module_init(mtd_speedtest_init); + +static void __exit mtd_speedtest_exit(void) +{ + return; +} +module_exit(mtd_speedtest_exit); + +MODULE_DESCRIPTION("Speed test module"); +MODULE_AUTHOR("Adrian Hunter"); +MODULE_LICENSE("GPL");