Searched hist:239940 (Results 1 - 3 of 3) sorted by relevance
| /freebsd-10.1-release/sys/dev/ixgbe/ | ||
| H A D | ixgbe_osdep.h | diff 239940 Fri Aug 31 08:09:33 MDT 2012 scottl Heavily optimize the case of small RX packets of 160 bytes or less. For this case, allocate a plain mbuf and copy the frame into it, then send the copy up the stack, leaving the original mbuf+cluster in place in the receive ring for immediate re-use. This saves a trip through 2 of the 3 zones of the compound mbuf allocator, a trip through busdma, and a trip through the 1 of the 3 mbuf destructors. For our load at Netflix, this can lower CPU consumption by as much as 20%. The copy algorithm is based on investigative work from Luigi Rizzo earlier in the year. Reviewed by: jfv Obtained from: Netflix |
| H A D | ixgbe.h | diff 239940 Fri Aug 31 08:09:33 MDT 2012 scottl Heavily optimize the case of small RX packets of 160 bytes or less. For this case, allocate a plain mbuf and copy the frame into it, then send the copy up the stack, leaving the original mbuf+cluster in place in the receive ring for immediate re-use. This saves a trip through 2 of the 3 zones of the compound mbuf allocator, a trip through busdma, and a trip through the 1 of the 3 mbuf destructors. For our load at Netflix, this can lower CPU consumption by as much as 20%. The copy algorithm is based on investigative work from Luigi Rizzo earlier in the year. Reviewed by: jfv Obtained from: Netflix |
| H A D | ixgbe.c | diff 239940 Fri Aug 31 08:09:33 MDT 2012 scottl Heavily optimize the case of small RX packets of 160 bytes or less. For this case, allocate a plain mbuf and copy the frame into it, then send the copy up the stack, leaving the original mbuf+cluster in place in the receive ring for immediate re-use. This saves a trip through 2 of the 3 zones of the compound mbuf allocator, a trip through busdma, and a trip through the 1 of the 3 mbuf destructors. For our load at Netflix, this can lower CPU consumption by as much as 20%. The copy algorithm is based on investigative work from Luigi Rizzo earlier in the year. Reviewed by: jfv Obtained from: Netflix |
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