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cmd: mtd: Enable speed benchmarking

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Linux features a flash_speed speed test from the mtd-utils suite, U-Boot
does not. Benchmarks are useful for speed improvement developments as
well as troubleshooting or regression testing sometimes.

Enable a benchmark option to enable this feature.

Example of output on a Nuvoton platform:

MA35D1> mtd read nor0 0x81000000 0 0x10000
Reading 65536 byte(s) at offset 0x00000000
MA35D1> mtd read.benchmark nor0 0x81000000 0 0x10000
Reading 65536 byte(s) at offset 0x00000000
Read speed: 3752kiB/s

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Michael Trimarchi <michael@amarulasolutions.com>
This commit is contained in:
Miquel Raynal
2025-08-04 11:21:37 +02:00
committed by Michael Trimarchi
parent bb5d3a7a1c
commit d246e70cf8
1 changed files with 14 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
cmd/mtd.c
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@@ -17,6 +17,7 @@
#include <malloc.h>
#include <mapmem.h>
#include <mtd.h>
#include <time.h>
#include <dm/devres.h>
#include <linux/err.h>
@@ -466,8 +467,9 @@ static int mtd_special_write_oob(struct mtd_info *mtd, u64 off,
static int do_mtd_io(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
bool dump, read, raw, woob, write_empty_pages, has_pages = false;
bool dump, read, raw, woob, benchmark, write_empty_pages, has_pages = false;
u64 start_off, off, len, remaining, default_len;
unsigned long bench_start, bench_end;
struct mtd_oob_ops io_op = {};
uint user_addr = 0, npages;
const char *cmd = argv[0];
@@ -490,6 +492,7 @@ static int do_mtd_io(struct cmd_tbl *cmdtp, int flag, int argc,
read = dump || !strncmp(cmd, "read", 4);
raw = strstr(cmd, ".raw");
woob = strstr(cmd, ".oob");
benchmark = strstr(cmd, ".benchmark");
write_empty_pages = !has_pages || strstr(cmd, ".dontskipff");
argc -= 2;
@@ -559,6 +562,9 @@ static int do_mtd_io(struct cmd_tbl *cmdtp, int flag, int argc,
led_activity_blink();
if (benchmark)
bench_start = timer_get_us();
/* Loop over the pages to do the actual read/write */
while (remaining) {
/* Skip the block if it is bad */
@@ -586,6 +592,13 @@ static int do_mtd_io(struct cmd_tbl *cmdtp, int flag, int argc,
io_op.oobbuf += io_op.oobretlen;
}
if (benchmark && bench_start) {
bench_end = timer_get_us();
printf("%s speed: %lukiB/s\n",
read ? "Read" : "Write",
((io_op.len * 1000000) / (bench_end - bench_start)) / 1024);
}
led_activity_off();
if (!ret && dump)