Acked-by: Jeff Guo <jia....@intel.com>
> -----Original Message-----
> From: Guo, Jia
> Sent: Friday, January 15, 2021 4:31 PM
> To: 'Zhang,Alvin' <alvinx.zh...@intel.com>; Liang, Cunming
> <cunming.li...@intel.com>
> Cc: dev@dpdk.org; Zhang, AlvinX <alvinx.zh...@intel.com>;
> sta...@dpdk.org
> Subject: RE: [dpdk-dev] [PATCH] test: fix buffer overflow
>
> Hi, Alvin
>
> > -----Original Message-----
> > From: dev <dev-boun...@dpdk.org> On Behalf Of Zhang,Alvin
> > Sent: Wednesday, November 25, 2020 5:46 PM
> > To: Liang, Cunming <cunming.li...@intel.com>
> > Cc: dev@dpdk.org; Zhang, AlvinX <alvinx.zh...@intel.com>;
> > sta...@dpdk.org
> > Subject: [dpdk-dev] [PATCH] test: fix buffer overflow
> >
> > From: Alvin Zhang <alvinx.zh...@intel.com>
> >
> > The Tx buffer may overflow when there is more than one port.
> >
> > Signed-off-by: Alvin Zhang <alvinx.zh...@intel.com>
> >
> > Fixes: 002ade70e933 ("app/test: measure cycles per packet in Rx/Tx")
> > Cc: sta...@dpdk.org
> > ---
> > app/test/test_pmd_perf.c | 18 ++++++++----------
> > 1 file changed, 8 insertions(+), 10 deletions(-)
> >
> > diff --git a/app/test/test_pmd_perf.c b/app/test/test_pmd_perf.c index
> > 4db816a..3a248d5 100644
> > --- a/app/test/test_pmd_perf.c
> > +++ b/app/test/test_pmd_perf.c
> > @@ -606,10 +606,10 @@ enum {
> > static int
> > exec_burst(uint32_t flags, int lcore) {
> > - unsigned i, portid, nb_tx = 0;
> > + unsigned int portid, nb_tx = 0;
> > struct lcore_conf *conf;
> > uint32_t pkt_per_port;
> > - int num, idx = 0;
> > + int num, i, idx = 0;
> > int diff_tsc;
> >
> > conf = &lcore_conf[lcore];
> > @@ -628,16 +628,14 @@ enum {
> > rte_atomic64_set(&start, 1);
> >
> > /* start xmit */
> > + i = 0;
> > while (num) {
> > nb_tx = RTE_MIN(MAX_PKT_BURST, num);
> > - for (i = 0; i < conf->nb_ports; i++) {
> > - portid = conf->portlist[i];
> > - nb_tx = rte_eth_tx_burst(portid, 0,
> > - &tx_burst[idx], nb_tx);
> > - idx += nb_tx;
> > - num -= nb_tx;
> > - }
> > -
> > + portid = conf->portlist[i];
> > + nb_tx = rte_eth_tx_burst(portid, 0, &tx_burst[idx], nb_tx);
> > + idx += nb_tx;
> > + num -= nb_tx;
> > + i = (i >= conf->nb_ports - 1) ? 0 : (i + 1);
>
> If conf->nb_ports = 1, after the above assign, the i should be 1 and is that
> your expected?
Please ignore above comment, this code should be works.
>
> > }
> >
> > sleep(5);
> > --
> > 1.8.3.1
