+ FreeBSD NetPerf Project News +

Recent news relating to the FreeBSD Network Performance ...

Last Update: Sat Sep 30 07:20:59 2006

+ 20050809 log + More months of silence, in which code is written, but logs are not updated. Primarily, on-going work has been in the [...] Generally move to 64-bit counters. Sample memtop(8), memstat(8), etc. http://www.watson.org/robert/freebsd/li

+ 20050513 log + After several months of quiet in the log, some recent status: - My BSDCan 2005 netperf presentation is now [...] scope of the global pcbinfo lock for TCP in tcp_usr_send(), submitted by Kazuaki Oda , were merged to CVS HEAD.

+ 20050227 log + Integrate the netperf branch from FreeBSD CVS HEAD, bringing in a broad set of changes: - The possible race [...] has been merged to FreeBSD CVS, including the move to queue(9), PCB locking, etc. Also relevant from looped back wo

+ 20050227 log + We've run into a number of cases in which related state is maintained at the socket and protocol layers in the network [...] eliminates time-of-check / time-of-use races in the socket layer. Another possible approach is to accept the async

+ 20050102 patch + Integrate to CVS HEAD: - Remove now-obsoleted "Unlocked read" annotations. - Pick up UNIX domain [...] XXXRW comments from the socket code following review; merged trimmage to FreeBSD CVS. - Merged netrate fixed-rate pack

+ 20041204 patch + Integrate to CVS HEAD: - Merged subr_mbufqueue from rwatson_dispatch to rwatson_netperf. This is a library [...] in the TCP input path to avoid races in calculating available space. - Merged udp_in, udp_in6, udp_ip6 UDP bug

+ 20041128 log + The last week has seen work in the following areas: - A review of locking throughout the TCP implementation, [...] bug fix, although there are continued reports of problems that need to be investigated. - Updated the FreeBSD.or

+ 20041120 log + Over the past week or two, I've primarily on chasing bugs in the IPv4 code, NFSv3 code, and if_em driver, with some [...] is that the cost per-packet is still substantially higher than in 4.x, so in more CPU-constrained environemnts, this would be

+ 20041105 log + Over the last 48 hours, I've been measuring the cost of synchonization primitives in 5.x In particular, using the cycle [...] This is not disimilar to more classic use of a critical section to protect a per-CPU data structure, but doesn't rely on our

+ 20041103 patch + Integrate to CVS HEAD. A mutex to protect device polling state is introduced, pollmtx, and used to protect [...] during parallel execution of udp_input(). The if_dc driver will set IFF_NEEDSGIANT if not IS_MPSAFE.

+ 20041019 patch + Integrate to CVS HEAD. Added and merged to FreeBSD CVS IFF_LOCKGIANT() and IFF_UNLOCKGIANT(), which [...] before ether_demux() in ether_input() so as to gather entropy from an un-free'd mbuf rather than a free'd one.

+ 20041009 patch + Integrate to CVS HEAD. Merged /dev/random entropy harvesting locking strategy change to FreeBSD CVS. This [...] Also add assertions to utility functions, the syncache, et al. Register the IPv6 netisr as MPSAFE.

+ 20040908 patch + Integrate to CVS HEAD. Corrected a bug in sopoll() that could lead to races during the registration of [...] removal of key_int_random and related randomization re-seed code in the KAME IPSEC implementation into FreeBSD CVS.

+ 20040902 patch + Integrate to CVS HEAD. Merged NET_WITH_GIANT, NET_NEEDS_GIANT(), and default to MPSAFE network operation to [...] linker would be called from the Netgraph socket send code without Giant held; merged directly to FreeBSD CVS.

+ 20040828 patch + Integrate to CVS HEAD. Change the default setting for debug_mpsafenet to 1 from 0, which runs the network [...] synchronization. Merged removal of UNIX domain socket locks from unp_gc() to FreeBSD CVS repository.