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.ray...@bootlin.com>
---
Changes in v2:
* Use an unsigned long as advised by Michael for accounting time.
---
cmd/mtd.c | 15 ++++++++++++++-
1 file changed, 14 insertions(+), 1 deletion(-)
diff --git a/cmd/mtd.c b/cmd/mtd.c
index c25997cfb246..2520b89eed2c 100644
--- a/cmd/mtd.c
+++ b/cmd/mtd.c
@@ -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)
--
2.50.1
