Author: sephe
Date: Wed Apr 27 06:49:16 2016
New Revision: 298694
URL: https://svnweb.freebsd.org/changeset/base/298694
Log:
hyperv/hn: Add stat for # of chimney sending tries
MFC after: 1 week
Sponsored by: Microsoft OSTC
Modified:
head/sys/dev/hyperv/netvsc/hv_net_vsc.h
head/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c
Modified: head/sys/dev/hyperv/netvsc/hv_net_vsc.h
==============================================================================
--- head/sys/dev/hyperv/netvsc/hv_net_vsc.h Wed Apr 27 05:45:14 2016
(r298693)
+++ head/sys/dev/hyperv/netvsc/hv_net_vsc.h Wed Apr 27 06:49:16 2016
(r298694)
@@ -1211,6 +1211,7 @@ struct hn_tx_ring {
u_long hn_send_failed;
u_long hn_txdma_failed;
u_long hn_tx_collapsed;
+ u_long hn_tx_chimney_tried;
u_long hn_tx_chimney;
u_long hn_pkts;
Modified: head/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c
==============================================================================
--- head/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c Wed Apr 27 05:45:14
2016 (r298693)
+++ head/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c Wed Apr 27 06:49:16
2016 (r298694)
@@ -1004,6 +1004,7 @@ hn_encap(struct hn_tx_ring *txr, struct
netvsc_dev *net_dev = txr->hn_sc->net_dev;
uint32_t send_buf_section_idx;
+ txr->hn_tx_chimney_tried++;
send_buf_section_idx =
hv_nv_get_next_send_section(net_dev);
if (send_buf_section_idx !=
@@ -2595,6 +2596,10 @@ hn_create_tx_data(struct hn_softc *sc, i
CTLTYPE_ULONG | CTLFLAG_RW | CTLFLAG_MPSAFE, sc,
__offsetof(struct hn_tx_ring, hn_tx_chimney),
hn_tx_stat_ulong_sysctl, "LU", "# of chimney send");
+ SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "tx_chimney_tried",
+ CTLTYPE_ULONG | CTLFLAG_RW | CTLFLAG_MPSAFE, sc,
+ __offsetof(struct hn_tx_ring, hn_tx_chimney_tried),
+ hn_tx_stat_ulong_sysctl, "LU", "# of chimney send tries");
SYSCTL_ADD_INT(ctx, child, OID_AUTO, "txdesc_cnt",
CTLFLAG_RD, &sc->hn_tx_ring[0].hn_txdesc_cnt, 0,
"# of total TX descs");
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