diff options
| author | Neil Horman <nhorman@tuxdriver.com> | 2009-05-21 11:36:08 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-05-22 03:50:21 +0400 |
| commit | 4ea7e38696c7e798c47ebbecadfd392f23f814f9 (patch) | |
| tree | 1e144d0c79fb667860ff7fa0ed203984e888ddab /net/core/netpoll.c | |
| parent | d95ed9275edcb8995bda31005bb3f55e087626d7 (diff) | |
| download | linux-4ea7e38696c7e798c47ebbecadfd392f23f814f9.tar.xz | |
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/netpoll.c')
| -rw-r--r-- | net/core/netpoll.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/net/core/netpoll.c b/net/core/netpoll.c index 64f51eec6576..00b14e2c50ed 100644 --- a/net/core/netpoll.c +++ b/net/core/netpoll.c @@ -24,6 +24,7 @@ #include <net/tcp.h> #include <net/udp.h> #include <asm/unaligned.h> +#include <trace/napi.h> /* * We maintain a small pool of fully-sized skbs, to make sure the @@ -137,6 +138,7 @@ static int poll_one_napi(struct netpoll_info *npinfo, set_bit(NAPI_STATE_NPSVC, &napi->state); work = napi->poll(napi, budget); + trace_napi_poll(napi->dev); clear_bit(NAPI_STATE_NPSVC, &napi->state); atomic_dec(&trapped); |