diff options
| author |   Eugene Crosser <Eugene.Crosser@ru.ibm.com> | 2016-06-16 16:18:57 +0200 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2016-06-16 22:16:12 -0700 |
| commit | 6059c90537868bfd365163ba3dff95cf775939ff (patch) | |
| tree | ba0d5ffd135c9948ff46a21000c6a98c15a01117 /drivers/s390 | |
| parent | qeth: enable scatter/gather by default (diff) | |
| download | linux-dev-6059c90537868bfd365163ba3dff95cf775939ff.tar.xz linux-dev-6059c90537868bfd365163ba3dff95cf775939ff.zip | |
qeth: introduce linearization fail count to stats
When skb data touches too many pages, skb_linearize() is called
opportunistically in the hope that less pages will be required
for a big linear buffer than for multiple fragments. This patch
intoduces a separate counter in ethtool statistics structure
representing _failed_ linearization attempts.
Signed-off-by: Eugene Crosser <Eugene.Crosser@ru.ibm.com>
Signed-off-by: Ursula Braun <ubraun@linux.vnet.ibm.com>
Reviewed-by: Lakhvich Dmitriy <ldmitriy@ru.ibm.com>
Reviewed-by: Thomas Richter <tmricht@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/s390')
| -rw-r--r-- | drivers/s390/net/qeth_core.h | 1 | ||||
| -rw-r--r-- | drivers/s390/net/qeth_core_main.c | 6 | ||||
| -rw-r--r-- | drivers/s390/net/qeth_l2_main.c | 12 | ||||
| -rw-r--r-- | drivers/s390/net/qeth_l3_main.c | 12 |
4 files changed, 23 insertions, 8 deletions
diff --git a/drivers/s390/net/qeth_core.h b/drivers/s390/net/qeth_core.h index c3ab956536ff..b4f14e4b8966 100644 --- a/drivers/s390/net/qeth_core.h +++ b/drivers/s390/net/qeth_core.h @@ -145,6 +145,7 @@ struct qeth_perf_stats { unsigned int sg_alloc_page_rx; unsigned int tx_csum; unsigned int tx_lin; + unsigned int tx_linfail; }; /* Routing stuff */ diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c index a91a31d2fc9a..9806ee046fa5 100644 --- a/drivers/s390/net/qeth_core_main.c +++ b/drivers/s390/net/qeth_core_main.c @@ -5801,6 +5801,7 @@ static struct { {"tx do_QDIO count"}, {"tx csum"}, {"tx lin"}, + {"tx linfail"}, {"cq handler count"}, {"cq handler time"} }; @@ -5861,8 +5862,9 @@ void qeth_core_get_ethtool_stats(struct net_device *dev, data[32] = card->perf_stats.outbound_do_qdio_cnt; data[33] = card->perf_stats.tx_csum; data[34] = card->perf_stats.tx_lin; - data[35] = card->perf_stats.cq_cnt; - data[36] = card->perf_stats.cq_time; + data[35] = card->perf_stats.tx_linfail; + data[36] = card->perf_stats.cq_cnt; + data[37] = card->perf_stats.cq_time; } EXPORT_SYMBOL_GPL(qeth_core_get_ethtool_stats); diff --git a/drivers/s390/net/qeth_l2_main.c b/drivers/s390/net/qeth_l2_main.c index e24627f49b6e..08b5fa969d4a 100644 --- a/drivers/s390/net/qeth_l2_main.c +++ b/drivers/s390/net/qeth_l2_main.c @@ -898,10 +898,16 @@ static int qeth_l2_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) */ if ((card->info.type != QETH_CARD_TYPE_IQD) && !qeth_get_elements_no(card, new_skb, 0)) { - if (skb_linearize(new_skb)) + int lin_rc = skb_linearize(new_skb); + + if (card->options.performance_stats) { + if (lin_rc) + card->perf_stats.tx_linfail++; + else + card->perf_stats.tx_lin++; + } + if (lin_rc) goto tx_drop; - if (card->options.performance_stats) - card->perf_stats.tx_lin++; } if (card->info.type == QETH_CARD_TYPE_OSN) diff --git a/drivers/s390/net/qeth_l3_main.c b/drivers/s390/net/qeth_l3_main.c index 0afdb144e979..51077fb69a98 100644 --- a/drivers/s390/net/qeth_l3_main.c +++ b/drivers/s390/net/qeth_l3_main.c @@ -2918,10 +2918,16 @@ static int qeth_l3_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) if ((card->info.type != QETH_CARD_TYPE_IQD) && ((use_tso && !qeth_l3_get_elements_no_tso(card, new_skb, 1)) || (!use_tso && !qeth_get_elements_no(card, new_skb, 0)))) { - if (skb_linearize(new_skb)) + int lin_rc = skb_linearize(new_skb); + + if (card->options.performance_stats) { + if (lin_rc) + card->perf_stats.tx_linfail++; + else + card->perf_stats.tx_lin++; + } + if (lin_rc) goto tx_drop; - if (card->options.performance_stats) - card->perf_stats.tx_lin++; } if (use_tso) { |