RE: [PATCH] testpmd: optimize forward stream statistics

["Guo, Junfeng" <junfeng.guo@intel.com>]

> -----Original Message-----
> From: Singh, Aman Deep <aman.deep.singh@intel.com>
> Sent: Wednesday, June 1, 2022 16:46
> To: Guo, Junfeng <junfeng.guo@intel.com>; Zhang, Qi Z
> <qi.z.zhang@intel.com>; Wu, Jingjing <jingjing.wu@intel.com>; Xing,
> Beilei <beilei.xing@intel.com>
> Cc: dev@dpdk.org; Wang, Xiao W <xiao.w.wang@intel.com>
> Subject: Re: [PATCH] testpmd: optimize forward stream statistics
> 
> Hi Junfeng
> 
> On 5/24/2022 1:57 PM, Junfeng Guo wrote:
> > 1. add throughput statistics for forward stream
> > 2. display forward statistics for every forward stream
> >
> > Signed-off-by: Xiao Wang <xiao.w.wang@intel.com>
> > Signed-off-by: Junfeng Guo <junfeng.guo@intel.com>
> > ---
> >   app/test-pmd/testpmd.c | 41
> ++++++++++++++++++++++++++++++++++++++---
> >   app/test-pmd/testpmd.h |  6 ++++++
> >   2 files changed, 44 insertions(+), 3 deletions(-)
> >
> > diff --git a/app/test-pmd/testpmd.c b/app/test-pmd/testpmd.c
> > index fe2ce19f99..076a042e77 100644
> > --- a/app/test-pmd/testpmd.c
> > +++ b/app/test-pmd/testpmd.c
> > @@ -1926,6 +1926,8 @@ fwd_stream_stats_display(streamid_t
> stream_id)
> >   {
> >   	struct fwd_stream *fs;
> >   	static const char *fwd_top_stats_border = "-------";
> > +	uint64_t diff_pkts_rx, diff_pkts_tx, diff_cycles;
> > +	uint64_t pps_rx, pps_tx;
> >
> >   	fs = fwd_streams[stream_id];
> >   	if ((fs->rx_packets == 0) && (fs->tx_packets == 0) &&
> > @@ -1939,6 +1941,21 @@ fwd_stream_stats_display(streamid_t
> stream_id)
> >   	       " TX-dropped: %-14"PRIu64,
> >   	       fs->rx_packets, fs->tx_packets, fs->fwd_dropped);
> >
> > +	diff_pkts_rx = fs->rx_packets - fs->pre_rx;
> > +	diff_pkts_tx = fs->tx_packets - fs->pre_tx;
> > +	diff_cycles = fs->pre_cycles;
> > +
> > +	fs->pre_rx = fs->rx_packets;
> > +	fs->pre_tx = fs->tx_packets;
> > +	fs->pre_cycles = rte_rdtsc();
> > +	if (diff_cycles > 0)
> > +		diff_cycles = fs->pre_cycles - diff_cycles;
> > +
> > +	pps_rx = diff_cycles > 0 ?
> > +		(double)diff_pkts_rx * rte_get_tsc_hz() / diff_cycles : 0;
> > +	pps_tx = diff_cycles > 0 ?
> > +		(double)diff_pkts_tx * rte_get_tsc_hz() / diff_cycles : 0;
> > +
> >   	/* if checksum mode */
> >   	if (cur_fwd_eng == &csum_fwd_engine) {
> >   		printf("  RX- bad IP checksum: %-14"PRIu64
> > @@ -1952,6 +1969,11 @@ fwd_stream_stats_display(streamid_t
> stream_id)
> >   		printf("\n");
> >   	}
> >
> > +	printf("\n  Throughput (since last show)\n");
> > +	printf("  Rx-pps: %12"PRIu64"\n  Tx-pps: %12"PRIu64"\n", pps_rx,
> pps_tx);
> > +	fs->rx_pps = pps_rx;
> > +	fs->tx_pps = pps_tx;
> > +
> >   	if (record_burst_stats) {
> >   		pkt_burst_stats_display("RX", &fs->rx_burst_stats);
> >   		pkt_burst_stats_display("TX", &fs->tx_burst_stats);
> > @@ -1979,6 +2001,8 @@ fwd_stats_display(void)
> >   	uint64_t fwd_cycles = 0;
> >   	uint64_t total_recv = 0;
> >   	uint64_t total_xmit = 0;
> > +	uint64_t total_rx_pps = 0;
> > +	uint64_t total_tx_pps = 0;
> >   	struct rte_port *port;
> >   	streamid_t sm_id;
> >   	portid_t pt_id;
> > @@ -1989,10 +2013,9 @@ fwd_stats_display(void)
> >   	for (sm_id = 0; sm_id < cur_fwd_config.nb_fwd_streams;
> sm_id++) {
> >   		struct fwd_stream *fs = fwd_streams[sm_id];
> >
> > -		if (cur_fwd_config.nb_fwd_streams >
> > +		fwd_stream_stats_display(sm_id);
> > +		if (cur_fwd_config.nb_fwd_streams ==
> >   		    cur_fwd_config.nb_fwd_ports) {
> > -			fwd_stream_stats_display(sm_id);
> > -		} else {
> >   			ports_stats[fs->tx_port].tx_stream = fs;
> >   			ports_stats[fs->rx_port].rx_stream = fs;
> >   		}
> > @@ -2008,7 +2031,14 @@ fwd_stats_display(void)
> >
> >   		if (record_core_cycles)
> >   			fwd_cycles += fs->core_cycles;
> > +
> > +		total_rx_pps += fs->rx_pps;
> > +		total_tx_pps += fs->tx_pps;
> >   	}
> > +
> > +	printf("\n  Total Rx-pps: %12"PRIu64"  Tx-pps: %12"PRIu64"\n",
> > +	       total_rx_pps, total_tx_pps);
> > +
> >   	for (i = 0; i < cur_fwd_config.nb_fwd_ports; i++) {
> >   		pt_id = fwd_ports_ids[i];
> >   		port = &ports[pt_id];
> > @@ -2124,6 +2154,11 @@ fwd_stats_reset(void)
> >   		fs->rx_bad_l4_csum = 0;
> >   		fs->rx_bad_outer_l4_csum = 0;
> >   		fs->rx_bad_outer_ip_csum = 0;
> > +		fs->pre_rx = 0;
> > +		fs->pre_tx = 0;
> > +		fs->pre_cycles = 0;
> > +		fs->rx_pps = 0;
> > +		fs->tx_pps = 0;
> >
> >   		memset(&fs->rx_burst_stats, 0, sizeof(fs-
> >rx_burst_stats));
> >   		memset(&fs->tx_burst_stats, 0, sizeof(fs-
> >tx_burst_stats));
> > diff --git a/app/test-pmd/testpmd.h b/app/test-pmd/testpmd.h
> > index 31f766c965..cad57af27e 100644
> > --- a/app/test-pmd/testpmd.h
> > +++ b/app/test-pmd/testpmd.h
> > @@ -155,6 +155,12 @@ struct fwd_stream {
> >   	struct pkt_burst_stats rx_burst_stats;
> >   	struct pkt_burst_stats tx_burst_stats;
> >   	struct fwd_lcore *lcore; /**< Lcore being scheduled. */
> > +
> > +	uint64_t pre_rx;
> > +	uint64_t pre_tx;
> > +	uint64_t pre_cycles;
> > +	uint64_t rx_pps;
> > +	uint64_t tx_pps;
> >   };
> For each parameter, please add comment to describe its purpose.
> Just as it is done for other parameters in the struct.

Thanks for your review and comments!
I'll update the code in the coming version.

Regards,
Junfeng Guo

> >
> >   /**