> -----Original Message-----
> From: Jerin Jacob [mailto:jerin.ja...@caviumnetworks.com]
> Sent: Friday, June 30, 2017 4:31 AM
> To: Kurakin, Ilia <ilia.kura...@intel.com>
> Cc: dev@dpdk.org; Ananyev, Konstantin <konstantin.anan...@intel.com>; Wiles,
> Keith <keith.wi...@intel.com>; Galanov, Dmitry
> <dmitry.gala...@intel.com>
> Subject: Re: [dpdk-dev] [PATCH] ether: add support for vtune task tracing
>
> -----Original Message-----
> > Date: Tue, 27 Jun 2017 16:16:01 +0300
> > From: ilia.kura...@intel.com
> > To: dev@dpdk.org
> > CC: konstantin.anan...@intel.com, keith.wi...@intel.com,
> > dmitry.gala...@intel.com, Ilia Kurakin <ilia.kura...@intel.com>
> > Subject: [dpdk-dev] [PATCH] ether: add support for vtune task tracing
> > X-Mailer: git-send-email 2.7.4
> >
> > From: Ilia Kurakin <ilia.kura...@intel.com>
> >
> > diff --git a/lib/librte_ether/rte_ethdev.h b/lib/librte_ether/rte_ethdev.h
> > index f6e6c74..ee7cc42 100644
> > --- a/lib/librte_ether/rte_ethdev.h
> > +++ b/lib/librte_ether/rte_ethdev.h
> > @@ -186,6 +186,10 @@ extern "C" {
> > #include "rte_eth_ctrl.h"
> > #include "rte_dev_info.h"
> >
> > +#ifdef RTE_ETHDEV_TRACE_WASTED_RX_ITERATIONS
> > +#include "rte_eth_itt.h"
> > +#endif
> > +
> > struct rte_mbuf;
> >
> > /**
> > @@ -2710,6 +2714,25 @@ rte_eth_rx_burst(uint8_t port_id, uint16_t queue_id,
> > int16_t nb_rx = (*dev->rx_pkt_burst)(dev->data->rx_queues[queue_id],
> > rx_pkts, nb_pkts);
> >
> > +#ifdef RTE_ETHDEV_TRACE_WASTED_RX_ITERATIONS
>
> If we give the generic name like above then the solution should be generic
> and it should not be tightly coupled with itt.
>
> Different architectures may have different profiling tools like x86 has
> itt or it is possible to have generic perf based plugin in future.
>
> Considering the above points, IMO, we can not add code in
> rte_eth_rx_burst() for each profiling variants.
+ 1
>I think, this code can
> go in lib/librte_ether/rte_ethdev_profile.c and based on specific
> conditional compilation flag(something like
> RTE_ETHDEV_TRACE_ITT_WASTED_RX_ITERATIONS)
> it can register a rx callback.
> or any other scheme without directly modifying rte_eth_rx_burst() for
> itt based profiling.
Or might be even better to have some wrapper function/macro on top of
rx_burst():
rx_burst_profle(...) or so.
Then user can either replace rx_burst() with rx_burst_profile() by conditional
compilation,
or just call rx_burst_profile() directly.
Konstantin
>
>
> > + /* See rte_eth_itt.h to find comments on code below. */
> > + if (unlikely(nb_rx == 0)) {
> > + if (!itt_aux_data[port_id].queue_is_wasting_iters[queue_id]) {
> > + __itt_task_begin(
> > +
> > itt_aux_data[port_id].wasted_iter_domains[queue_id],
> > + __itt_null, __itt_null,
> > +
> > itt_aux_data[port_id].wasted_iter_handles[queue_id]);
> > + itt_aux_data[port_id].queue_is_wasting_iters[queue_id]
> > = 1;
> > + }
> > + } else {
> > + if
> > (unlikely(itt_aux_data[port_id].queue_is_wasting_iters[queue_id])) {
> > + __itt_task_end(
> > +
> > itt_aux_data[port_id].wasted_iter_domains[queue_id]);
> > + itt_aux_data[port_id].queue_is_wasting_iters[queue_id]
> > = 0;
> > + }
> > + }
> > +#endif
> > +
> > #ifdef RTE_ETHDEV_RXTX_CALLBACKS
> > struct rte_eth_rxtx_callback *cb = dev->post_rx_burst_cbs[queue_id];
> >
> > --
> > 2.7.4
> >
> >
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