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| author | Neil Horman <nhorman@tuxdriver.com> | 2009-05-21 07:36:08 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-05-21 16:50:21 -0700 |
| commit | 4ea7e38696c7e798c47ebbecadfd392f23f814f9 (patch) | |
| tree | 1e144d0c79fb667860ff7fa0ed203984e888ddab /net/core/net-traces.c | |
| parent | d95ed9275edcb8995bda31005bb3f55e087626d7 (diff) | |
| download | linux-4ea7e38696c7e798c47ebbecadfd392f23f814f9.tar.gz linux-4ea7e38696c7e798c47ebbecadfd392f23f814f9.tar.bz2 linux-4ea7e38696c7e798c47ebbecadfd392f23f814f9.zip | |
dropmon: add ability to detect when hardware dropsrxpackets
Patch to add the ability to detect drops in hardware interfaces via dropwatch.
Adds a tracepoint to net_rx_action to signal everytime a napi instance is
polled. The dropmon code then periodically checks to see if the rx_frames
counter has changed, and if so, adds a drop notification to the netlink
protocol, using the reserved all-0's vector to indicate the drop location was in
hardware, rather than somewhere in the code.
Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
include/linux/net_dropmon.h | 8 ++
include/trace/napi.h | 11 +++
net/core/dev.c | 5 +
net/core/drop_monitor.c | 124 ++++++++++++++++++++++++++++++++++++++++++--
net/core/net-traces.c | 4 +
net/core/netpoll.c | 2
6 files changed, 149 insertions(+), 5 deletions(-)
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/net-traces.c')
| -rw-r--r-- | net/core/net-traces.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/net/core/net-traces.c b/net/core/net-traces.c index c8fb45665e4f..b07b25bd2cde 100644 --- a/net/core/net-traces.c +++ b/net/core/net-traces.c @@ -20,6 +20,7 @@ #include <linux/netlink.h> #include <linux/net_dropmon.h> #include <trace/skb.h> +#include <trace/napi.h> #include <asm/unaligned.h> #include <asm/bitops.h> @@ -27,3 +28,6 @@ DEFINE_TRACE(kfree_skb); EXPORT_TRACEPOINT_SYMBOL_GPL(kfree_skb); + +DEFINE_TRACE(napi_poll); +EXPORT_TRACEPOINT_SYMBOL_GPL(napi_poll); |