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hyperv/hn: Increase LRO entry count to 128 by default

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hn(4) only has one RX ring currently, so default 8 LRO entries
are too small.

Reviewed by:	adrian
Approved by:	adrian (mentor)
MFC after:	1 week
Sponsored by:	Microsoft OSTC
Differential Revision:	https://reviews.freebsd.org/D5166
This commit is contained in:
Sepherosa Ziehau 2016-02-05 05:38:01 +00:00
parent 1e4bb37d22
commit e35e485b04
1 changed files with 28 additions and 0 deletions
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28
sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c
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@ -132,6 +132,8 @@ __FBSDID("$FreeBSD$");
/* YYY should get it from the underlying channel */
#define HN_TX_DESC_CNT 512
#define HN_LROENT_CNT_DEF 128
#define HN_RNDIS_MSG_LEN \
(sizeof(rndis_msg) + \
RNDIS_VLAN_PPI_SIZE + \
@ -232,6 +234,13 @@ TUNABLE_INT("dev.hn.tx_chimney_size", &hn_tx_chimney_size);
static int hn_direct_tx_size = HN_DIRECT_TX_SIZE_DEF;
TUNABLE_INT("dev.hn.direct_tx_size", &hn_direct_tx_size);
#if defined(INET) || defined(INET6)
#if __FreeBSD_version >= 1100095
static int hn_lro_entry_count = HN_LROENT_CNT_DEF;
TUNABLE_INT("dev.hn.lro_entry_count", &hn_lro_entry_count);
#endif
#endif
/*
* Forward declarations
*/
@ -334,6 +343,11 @@ netvsc_attach(device_t dev)
int error;
#if __FreeBSD_version >= 1100045
int tso_maxlen;
#endif
#if defined(INET) || defined(INET6)
#if __FreeBSD_version >= 1100095
int lroent_cnt;
#endif
#endif
sc = device_get_softc(dev);
@ -417,9 +431,17 @@ netvsc_attach(device_t dev)
}
#if defined(INET) || defined(INET6)
#if __FreeBSD_version >= 1100095
lroent_cnt = hn_lro_entry_count;
if (lroent_cnt < TCP_LRO_ENTRIES)
lroent_cnt = TCP_LRO_ENTRIES;
tcp_lro_init_args(&sc->hn_lro, ifp, lroent_cnt, 0);
device_printf(dev, "LRO: entry count %d\n", lroent_cnt);
#else
tcp_lro_init(&sc->hn_lro);
/* Driver private LRO settings */
sc->hn_lro.ifp = ifp;
#endif
#ifdef HN_LRO_HIWAT
sc->hn_lro.lro_hiwat = sc->hn_lro_hiwat;
#endif
@ -547,6 +569,12 @@ netvsc_attach(device_t dev)
SYSCTL_ADD_INT(dc_ctx, dc_child, OID_AUTO, "direct_tx_size",
CTLFLAG_RD, &hn_direct_tx_size, 0,
"Size of the packet for direct transmission");
#if defined(INET) || defined(INET6)
#if __FreeBSD_version >= 1100095
SYSCTL_ADD_INT(dc_ctx, dc_child, OID_AUTO, "lro_entry_count",
CTLFLAG_RD, &hn_lro_entry_count, 0, "LRO entry count");
#endif
#endif
}
return (0);