[CCID 3]: Use skb timestamp for receiver side
This patch replaces calls to do_gettimeofday at the receiver CCID 3
with skb timestamps. The skb timestamps are computed earlier in the
receive path, experimental measurements have shown that up to several
hundred microseconds can lie between the skb receive timestamp and the
timestamp taken when CCID 3 receives the packet. This difference has
a negative impact on RTT estimation (reduced accuracy).
Signed-off-by: Gerrit Renker <[EMAIL PROTECTED]>
---
net/dccp/ccids/lib/packet_history.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/net/dccp/ccids/lib/packet_history.h
+++ b/net/dccp/ccids/lib/packet_history.h
@@ -151,7 +151,7 @@ static inline struct dccp_rx_hist_entry
entry->dccphrx_ccval = dh->dccph_ccval;
entry->dccphrx_type = dh->dccph_type;
entry->dccphrx_ndp = ndp;
- do_gettimeofday(&entry->dccphrx_tstamp);
+ skb_get_timestamp(skb, &entry->dccphrx_tstamp);
}
return entry;
-
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