From 34ff636f322c6d5e4f0a52338fa63a7dff09a495 Mon Sep 17 00:00:00 2001 From: Joel Fernandes Date: Sat, 18 Jul 2026 13:15:36 -0400 Subject: scftorture: Count single_rpc offline failures in statistics output scf_torture_stats_print() aggregates each invoker thread's counters into a local scf_statistics structure before printing, but the n_single_rpc_ofl field is missing from the aggregation loop. As a result, the "single_rpc_ofl" value printed in the statistics line is always zero, even when smp_call_function_single() invocations for the RPC test have failed due to offline CPUs and been counted by the invoker threads. Add the missing accumulation so that the printed value reflects the actual counts. Signed-off-by: Joel Fernandes Signed-off-by: Paul E. McKenney --- drivers/mtd/tests/speedtest.c | 418 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 418 insertions(+) create mode 100644 drivers/mtd/tests/speedtest.c (limited to 'drivers/mtd/tests/speedtest.c') diff --git a/drivers/mtd/tests/speedtest.c b/drivers/mtd/tests/speedtest.c new file mode 100644 index 000000000..075bce32c --- /dev/null +++ b/drivers/mtd/tests/speedtest.c @@ -0,0 +1,418 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2007 Nokia Corporation + * + * Test read and write speed of a MTD device. + * + * Author: Adrian Hunter + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "mtd_test.h" + +static int dev = -EINVAL; +module_param(dev, int, S_IRUGO); +MODULE_PARM_DESC(dev, "MTD device number to use"); + +static int count; +module_param(count, int, S_IRUGO); +MODULE_PARM_DESC(count, "Maximum number of eraseblocks to use " + "(0 means use all)"); + +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 ktime_t start, finish; + +static int multiblock_erase(int ebnum, int blocks) +{ + int err; + struct erase_info ei; + loff_t addr = (loff_t)ebnum * mtd->erasesize; + + memset(&ei, 0, sizeof(struct erase_info)); + ei.addr = addr; + ei.len = mtd->erasesize * blocks; + + err = mtd_erase(mtd, &ei); + if (err) { + pr_err("error %d while erasing EB %d, blocks %d\n", + err, ebnum, blocks); + return err; + } + + return 0; +} + +static int write_eraseblock(int ebnum) +{ + loff_t addr = (loff_t)ebnum * mtd->erasesize; + + return mtdtest_write(mtd, addr, mtd->erasesize, iobuf); +} + +static int write_eraseblock_by_page(int ebnum) +{ + int i, err = 0; + loff_t addr = (loff_t)ebnum * mtd->erasesize; + void *buf = iobuf; + + for (i = 0; i < pgcnt; i++) { + err = mtdtest_write(mtd, addr, pgsize, buf); + if (err) + break; + addr += pgsize; + buf += pgsize; + } + + return err; +} + +static int write_eraseblock_by_2pages(int ebnum) +{ + size_t sz = pgsize * 2; + int i, n = pgcnt / 2, err = 0; + loff_t addr = (loff_t)ebnum * mtd->erasesize; + void *buf = iobuf; + + for (i = 0; i < n; i++) { + err = mtdtest_write(mtd, addr, sz, buf); + if (err) + return err; + addr += sz; + buf += sz; + } + if (pgcnt % 2) + err = mtdtest_write(mtd, addr, pgsize, buf); + + return err; +} + +static int read_eraseblock(int ebnum) +{ + loff_t addr = (loff_t)ebnum * mtd->erasesize; + + return mtdtest_read(mtd, addr, mtd->erasesize, iobuf); +} + +static int read_eraseblock_by_page(int ebnum) +{ + int i, err = 0; + loff_t addr = (loff_t)ebnum * mtd->erasesize; + void *buf = iobuf; + + for (i = 0; i < pgcnt; i++) { + err = mtdtest_read(mtd, addr, pgsize, buf); + if (err) + break; + addr += pgsize; + buf += pgsize; + } + + return err; +} + +static int read_eraseblock_by_2pages(int ebnum) +{ + size_t sz = pgsize * 2; + int i, n = pgcnt / 2, err = 0; + loff_t addr = (loff_t)ebnum * mtd->erasesize; + void *buf = iobuf; + + for (i = 0; i < n; i++) { + err = mtdtest_read(mtd, addr, sz, buf); + if (err) + return err; + addr += sz; + buf += sz; + } + if (pgcnt % 2) + err = mtdtest_read(mtd, addr, pgsize, buf); + + return err; +} + +static inline void start_timing(void) +{ + start = ktime_get(); +} + +static inline void stop_timing(void) +{ + finish = ktime_get(); +} + +static long calc_speed(void) +{ + uint64_t k, us; + + us = ktime_us_delta(finish, start); + if (us == 0) + return 0; + k = (uint64_t)goodebcnt * (mtd->erasesize / 1024) * 1000000; + do_div(k, us); + return k; +} + +static int __init mtd_speedtest_init(void) +{ + int err, i, blocks, j, k; + long speed; + uint64_t tmp; + + printk(KERN_INFO "\n"); + printk(KERN_INFO "=================================================\n"); + + if (dev < 0) { + pr_info("Please specify a valid mtd-device via module parameter\n"); + pr_crit("CAREFUL: This test wipes all data on the specified MTD device!\n"); + return -EINVAL; + } + + if (count) + pr_info("MTD device: %d count: %d\n", dev, count); + else + pr_info("MTD device: %d\n", dev); + + mtd = get_mtd_device(NULL, dev); + if (IS_ERR(mtd)) { + err = PTR_ERR(mtd); + pr_err("error: cannot get MTD device\n"); + return err; + } + + if (mtd->writesize == 1) { + pr_info("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 / pgsize; + + pr_info("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); + + if (count > 0 && count < ebcnt) + ebcnt = count; + + err = -ENOMEM; + iobuf = kmalloc(mtd->erasesize, GFP_KERNEL); + if (!iobuf) + goto out; + + get_random_bytes(iobuf, mtd->erasesize); + + bbt = kzalloc(ebcnt, GFP_KERNEL); + if (!bbt) + goto out; + err = mtdtest_scan_for_bad_eraseblocks(mtd, bbt, 0, ebcnt); + if (err) + goto out; + for (i = 0; i < ebcnt; i++) { + if (!bbt[i]) + goodebcnt++; + } + + err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt); + if (err) + goto out; + + /* Write all eraseblocks, 1 eraseblock at a time */ + pr_info("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; + + err = mtdtest_relax(); + if (err) + goto out; + } + stop_timing(); + speed = calc_speed(); + pr_info("eraseblock write speed is %ld KiB/s\n", speed); + + /* Read all eraseblocks, 1 eraseblock at a time */ + pr_info("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; + + err = mtdtest_relax(); + if (err) + goto out; + } + stop_timing(); + speed = calc_speed(); + pr_info("eraseblock read speed is %ld KiB/s\n", speed); + + err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt); + if (err) + goto out; + + /* Write all eraseblocks, 1 page at a time */ + pr_info("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; + + err = mtdtest_relax(); + if (err) + goto out; + } + stop_timing(); + speed = calc_speed(); + pr_info("page write speed is %ld KiB/s\n", speed); + + /* Read all eraseblocks, 1 page at a time */ + pr_info("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; + + err = mtdtest_relax(); + if (err) + goto out; + } + stop_timing(); + speed = calc_speed(); + pr_info("page read speed is %ld KiB/s\n", speed); + + err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt); + if (err) + goto out; + + /* Write all eraseblocks, 2 pages at a time */ + pr_info("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; + + err = mtdtest_relax(); + if (err) + goto out; + } + stop_timing(); + speed = calc_speed(); + pr_info("2 page write speed is %ld KiB/s\n", speed); + + /* Read all eraseblocks, 2 pages at a time */ + pr_info("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; + + err = mtdtest_relax(); + if (err) + goto out; + } + stop_timing(); + speed = calc_speed(); + pr_info("2 page read speed is %ld KiB/s\n", speed); + + /* Erase all eraseblocks */ + pr_info("Testing erase speed\n"); + start_timing(); + err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt); + if (err) + goto out; + stop_timing(); + speed = calc_speed(); + pr_info("erase speed is %ld KiB/s\n", speed); + + /* Multi-block erase all eraseblocks */ + for (k = 1; k < 7; k++) { + blocks = 1 << k; + pr_info("Testing %dx multi-block erase speed\n", + blocks); + start_timing(); + for (i = 0; i < ebcnt; ) { + for (j = 0; j < blocks && (i + j) < ebcnt; j++) + if (bbt[i + j]) + break; + if (j < 1) { + i++; + continue; + } + err = multiblock_erase(i, j); + if (err) + goto out; + + err = mtdtest_relax(); + if (err) + goto out; + + i += j; + } + stop_timing(); + speed = calc_speed(); + pr_info("%dx multi-block erase speed is %ld KiB/s\n", + blocks, speed); + } + pr_info("finished\n"); +out: + kfree(iobuf); + kfree(bbt); + put_mtd_device(mtd); + if (err) + pr_info("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"); -- cgit v1.3.1