Re: testing io.low limit for blk-throttle

[jianchao.wang]

Hi Paolo

When I test execute the script, I got this
8:0 rbps=10000000 wbps=0 riops=0 wiops=0 idle=0 latency=max

The idle is 0.
I'm afraid the io.low would not work.
Please refer to the following code in tg_set_limit

        /* force user to configure all settings for low limit  */
        if (!(tg->bps[READ][LIMIT_LOW] || tg->iops[READ][LIMIT_LOW] ||
              tg->bps[WRITE][LIMIT_LOW] || tg->iops[WRITE][LIMIT_LOW]) ||
            tg->idletime_threshold_conf == DFL_IDLE_THRESHOLD ||    //-----> 
HERE
            tg->latency_target_conf == DFL_LATENCY_TARGET) {
                tg->bps[READ][LIMIT_LOW] = 0;
                tg->bps[WRITE][LIMIT_LOW] = 0;
                tg->iops[READ][LIMIT_LOW] = 0;
                tg->iops[WRITE][LIMIT_LOW] = 0;
                tg->idletime_threshold = DFL_IDLE_THRESHOLD;
                tg->latency_target = DFL_LATENCY_TARGET;
        } else if (index == LIMIT_LOW) {
                tg->idletime_threshold = tg->idletime_threshold_conf;
                tg->latency_target = tg->latency_target_conf;
        }

        blk_throtl_update_limit_valid(tg->td);


Thanks
Jianchao

On 04/23/2018 03:37 PM, Paolo Valente wrote:
> cd thr-lat-with-interference
> sudo ./thr-lat-with-interference.sh -b t -w 100000000 -W "10000000 10000000 
> 10000000 10000000 10000000 10000000" -n 6 -T "read read read read read read" 
> -R "0 0 0 0 0 0"