netdev - Re: [iproute2-next v2 1/1] devlink: display elapsed time during flash update

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Date:   Tue, 6 Oct 2020 22:56:15 -0700
From:   David Ahern <dsahern@...il.com>
To:     Jacob Keller <jacob.e.keller@...el.com>, netdev@...r.kernel.org,
        Jakub Kicinski <kuba@...nel.org>,
        Shannon Nelson <snelson@...sando.io>
Subject: Re: [iproute2-next v2 1/1] devlink: display elapsed time during flash
 update

On 9/30/20 4:40 PM, Jacob Keller wrote:
> @@ -3124,12 +3140,19 @@ static int cmd_dev_flash_status_cb(const struct nlmsghdr *nlh, void *data)
>  		done = mnl_attr_get_u64(tb[DEVLINK_ATTR_FLASH_UPDATE_STATUS_DONE]);
>  	if (tb[DEVLINK_ATTR_FLASH_UPDATE_STATUS_TOTAL])
>  		total = mnl_attr_get_u64(tb[DEVLINK_ATTR_FLASH_UPDATE_STATUS_TOTAL]);
> +	if (tb[DEVLINK_ATTR_FLASH_UPDATE_STATUS_TIMEOUT])
> +		ctx->status_msg_timeout = mnl_attr_get_u64(tb[DEVLINK_ATTR_FLASH_UPDATE_STATUS_TIMEOUT]);
> +	else
> +		ctx->status_msg_timeout = 0;
>  
>  	if (!nullstrcmp(msg, ctx->last_msg) &&
>  	    !nullstrcmp(component, ctx->last_component) &&
>  	    ctx->last_pc && ctx->not_first) {
>  		pr_out_tty("\b\b\b\b\b"); /* clean percentage */
>  	} else {
> +		/* only update the last status timestamp if the message changed */
> +		gettimeofday(&ctx->time_of_last_status, NULL);

gettimeofday/REALCLOCK should not be used for measuring time differences.

> +
>  		if (ctx->not_first)
>  			pr_out("\n");
>  		if (component) {
> @@ -3155,11 +3178,72 @@ static int cmd_dev_flash_status_cb(const struct nlmsghdr *nlh, void *data)
>  	return MNL_CB_STOP;
>  }
>  
> +static void cmd_dev_flash_time_elapsed(struct cmd_dev_flash_status_ctx *ctx)
> +{
> +	struct timeval now, res;
> +
> +	gettimeofday(&now, NULL);
> +	timersub(&now, &ctx->time_of_last_status, &res);
> +