flashrom July 2021

flashrom@flashrom.org

20 participants
13 discussions

Why not use usleep() instead of clock_gettime() loop for delay ?
by Patrick Star 13 Jul '21

13 Jul '21

I saw flashrom process use too many cpu time when I use it to write flashchip. Then I strace the process, and found too many "clock_gettime(CLOCK_MONOTONIC...)" system call. And located it to udelay.c line 39, in function clock_usec_delay(). So I replace the code with just usleep(), as below, static void clock_usec_delay(int usecs) { usleep(usecs); } And it still worked well, and use much less cpu time, and the time spend on erase&write a chip is basicly the same as before. Also I write image to a flashchip and read it out with the modified flashrom many times, and the read out results are always same as the original image. So why not use usleep() to save cpu time ? BTW: I have used flashrom many years, it helped me a lot, thanks for your work, very grateful.

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Error Log
by Ionilith 08 Jul '21

08 Jul '21

sudo flashrom --programmer internalflashrom v1.0.1 on Linux 3.10.0-1160.31.1.el7.x86_64 (x86_64)flashrom is free software, get the source code at https://flashrom.orgUsing clock_gettime for delay loops (clk_id: 1, resolution: 1ns).No DMI table found.Found chipset "AMD FP4".Enabling flash write... FCH device found but SMBus revision 0x51 does not match known values.Please report this to flashrom(a)flashrom.org and include this log andthe output of lspci -nnvx, thanks!.Could not determine chipset generation.PROBLEMS, continuing anywayNo EEPROM/flash device found.Note: flashrom can never write if the flash chip isn't found automatically.

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stock flashrom vs Google forked flashrom on a chromebook running "stock linux"?
by James Feeney 01 Jul '21

01 Jul '21

When flashing the boot rom or the EC rom on, particularly, an Intel SOC chromebook, and running a "stock linux", instead of the original chromeos, is there any fundamental difference between the stock flashrom and the Google forked flashrom that would prevent the stock flashrom from working properly? Thanks James

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flashrom July 2021