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D4039.diff
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Index: head/sys/dev/e1000/if_igb.h
===================================================================
--- head/sys/dev/e1000/if_igb.h
+++ head/sys/dev/e1000/if_igb.h
@@ -355,7 +355,6 @@
volatile u16 tx_avail;
u16 next_avail_desc;
u16 next_to_clean;
- u16 process_limit;
u16 num_desc;
enum {
IGB_QUEUE_IDLE = 1,
@@ -534,6 +533,7 @@
int has_manage;
int wol;
int rx_process_limit;
+ int tx_process_limit;
u16 vf_ifp; /* a VF interface */
bool in_detach; /* Used only in igb_ioctl */
Index: head/sys/dev/e1000/if_igb.c
===================================================================
--- head/sys/dev/e1000/if_igb.c
+++ head/sys/dev/e1000/if_igb.c
@@ -336,6 +336,12 @@
&igb_rx_process_limit, 0,
"Maximum number of received packets to process at a time, -1 means unlimited");
+/* How many packets txeof tries to clean at a time */
+static int igb_tx_process_limit = -1;
+SYSCTL_INT(_hw_igb, OID_AUTO, tx_process_limit, CTLFLAG_RDTUN,
+ &igb_tx_process_limit, 0,
+ "Maximum number of sent packets to process at a time, -1 means unlimited");
+
#ifdef DEV_NETMAP /* see ixgbe.c for details */
#include <dev/netmap/if_igb_netmap.h>
#endif /* DEV_NETMAP */
@@ -453,11 +459,15 @@
e1000_get_bus_info(&adapter->hw);
- /* Sysctl for limiting the amount of work done in the taskqueue */
+ /* Sysctls for limiting the amount of work done in the taskqueues */
igb_set_sysctl_value(adapter, "rx_processing_limit",
"max number of rx packets to process",
&adapter->rx_process_limit, igb_rx_process_limit);
+ igb_set_sysctl_value(adapter, "tx_processing_limit",
+ "max number of tx packets to process",
+ &adapter->tx_process_limit, igb_tx_process_limit);
+
/*
* Validate number of transmit and receive descriptors. It
* must not exceed hardware maximum, and must be multiple
@@ -3971,7 +3981,7 @@
struct ifnet *ifp = adapter->ifp;
#endif /* DEV_NETMAP */
u32 work, processed = 0;
- u16 limit = txr->process_limit;
+ int limit = adapter->tx_process_limit;
struct igb_tx_buf *buf;
union e1000_adv_tx_desc *txd;
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D4039.diff (2 KB)
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D4039: Add support for sysctl knobs to live tune the tx packet processing limits in igb and fix a wrap-around bug.
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