> -----Original Message----- > From: Thomas Monjalon [mailto:thomas.monjalon at 6wind.com] > Sent: Friday, February 20, 2015 9:01 PM > To: Dumitrescu, Cristian > Cc: dev at dpdk.org; Stephen Hemminger > Subject: Re: [dpdk-dev] [PATCH v2 4/7] rte_sched: don't clear statistics when > read > > 2015-02-20 20:23, Dumitrescu, Cristian: > > From: Stephen Hemminger [mailto:stephen at networkplumber.org] > > > On Fri, 20 Feb 2015 18:32:03 +0000 > > > "Dumitrescu, Cristian" <cristian.dumitrescu at intel.com> wrote: > > > > > > > Stephen, I suggest adding a new build-time configuration option for the > > > > librte_sched library in config/common_* files: > > > > CONFIG_RTE_SCHED_STATS_CLEAR_ON_READ. > > > > > > Build time config options do not work for distributions. > > > > Why? > > > > This does not affect the API, as the new API functions are always compiled > > in, and the prototypes are not changed, and no data structures are > affected. > > Behaviour is an important part of the API. Think comments as part of the API.
Makes sense. > > > This only changes the behavior of certain functions, so that user can > > select which mode it needs. > > When user doesn't or cannot rebuild, he has no choice. > > > It also preserves backward compatibility. > > > > We have so many compilation options in config file, why is this one > different? > > We must remove and avoid build-time options. > The only ones which might be acceptable are the ones which allow more > performance by disabling some features. Agree. Stephen, how about a run-time solution (I agree it would be much better, why did I not consider this in the first place?) of adding a new bool parameter in struct rte_sched_port_params: clear_stats_on_reset? Both stats read function get the port handle (struct rte_sched_port *) as parameter, so there should be no ripple effect to propagate this flag. > > > This e-mail and any attachments may contain confidential material for the > > sole use of the intended recipient(s). Any review or distribution by others > > is strictly prohibited. If you are not the intended recipient, please > > contact > > the sender and delete all copies. > > Please ask to your administrator to remove this disclaimer. I did earlier, this is still work in progress unfortunately. -------------------------------------------------------------- Intel Shannon Limited Registered in Ireland Registered Office: Collinstown Industrial Park, Leixlip, County Kildare Registered Number: 308263 Business address: Dromore House, East Park, Shannon, Co. Clare This e-mail and any attachments may contain confidential material for the sole use of the intended recipient(s). Any review or distribution by others is strictly prohibited. If you are not the intended recipient, please contact the sender and delete all copies.
