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From: Lokesh Chakka <lvenkatakumarchakka@gmail.com>
Date: Fri, 21 Feb 2025 13:09:34 +0530
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Subject: mbuf validity in conjunction with ref cnt
To: users <users@dpdk.org>
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--000000000000456905062ea2181d
Content-Type: text/plain; charset="UTF-8"

Hello,

I've created mbuf using rte_pktmbuf_alloc.
Just after creating mbuf rte_mbuf_refcnt_read is giving 1.

After rte_eth_tx_burst, rte_mbuf_refcnt_read is giving 1.

Even
      rte_eth_tx_burst
      sleep(10);
       rte_mbuf_refcnt_read
is still giving 1

Even
      rte_eth_tx_burst
      sleep(10);
       rte_mbuf_refcnt_read // is still giving 1
       rte_pktmbuf_free
      sleep(10);
       rte_mbuf_refcnt_read // is still giving 1

Does it mean mbuf can be reused like
        while(1)
        {
                  rte_eth_tx_burst
        }


Thanks & Regards
--
Lokesh Chakka.

--000000000000456905062ea2181d
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div>Hello,</div><div><br></div><div>I&#39;ve created mbuf=
 using rte_pktmbuf_alloc. <br></div><div>Just after creating mbuf rte_mbuf_=
refcnt_read is giving 1.</div><div><br></div><div>After rte_eth_tx_burst, r=
te_mbuf_refcnt_read is giving 1.</div><div><br></div><div>Even <br></div><d=
iv>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 rte_eth_tx_burst</div><div>=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0 sleep(10);</div><div>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0 rte_mbuf_refcnt_read</div><div>is still giving 1</div><div><br></div><d=
iv><div>Even <br></div><div>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 rte_eth_tx_burst=
</div><div>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 sleep(10);</div><div>=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0 rte_mbuf_refcnt_read // is still giving 1</div><di=
v>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 rte_pktmbuf_free</div><div>=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0 sleep(10);</div><div>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0 rte_mbuf_refcnt_read // is still giving 1</div><div><br></div></div>=
<div>Does it mean mbuf can be reused like</div><div>=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0 while(1)</div><div>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0 {</div><div>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0=C2=A0 =C2=
=A0=C2=A0=C2=A0=C2=A0 rte_eth_tx_burst</div><div>=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0 }</div><div><div dir=3D"ltr" class=3D"gmail_signature" d=
ata-smartmail=3D"gmail_signature"><div dir=3D"ltr"><div><div dir=3D"ltr"><d=
iv><div dir=3D"ltr"><div><div dir=3D"ltr"><div><div dir=3D"ltr"><br><br>Tha=
nks &amp; Regards<br>--<br>Lokesh Chakka.</div></div></div></div></div></di=
v></div></div></div></div></div></div>

--000000000000456905062ea2181d--