AsiaBSDCon 2018の記録
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- いいね！0
msaitoh
@gussunoyoyo
BoF streaming URL 2018.asiabsdcon.org/streaming_room… #asiabsdcon
2018-03-09 20:30:19
Jun Ebihara
@ebijun
xcall process just one request at a time: subsequent requests need to wait for the completion of a running request #AsiaBSDCon
2018-03-09 20:30:28
鈴木光宏
@s_mitu
明日から論文セッションが始まるAsiaBSDConに、性懲りもなく今年もFreeBSD tankを持っていきます。 Raspberry Pi3のデスクトップ環境で、某電子の歌姫風ボイスで喋らせたりなんか適当な事をやってるので、NetBSDブースのついでにでも立ち寄ってください。 #FreeBSD #asiabsdcon pic.twitter.com/7oTVJ2FVUR
2018-03-09 20:31:01
拡大
Jun Ebihara
@ebijun
Lock Primitives:mutex rwlock NetBSD(pserialize psref localcount #AsiaBSDCon
2018-03-09 20:31:31
Jun Ebihara
@ebijun
rwlock(9) /pserialize(9): classic RCU:pserialize_read,pserialize_perform #AsiaBSDCon
2018-03-09 20:33:37
Jun Ebihara
@ebijun
pserialize(9) Reader:constraints for readers:: Writer:Constraints for writers #AsiaBSDCon
2018-03-09 20:35:12
Jun Ebihara
@ebijun
psref(9): passive reference:pserialize(9) LWP migrations between CPUS are not allowed #AsiaBSDCon
2018-03-09 20:37:18
Jun Ebihara
@ebijun
API readers: psref_aquire/release/target_destroy; curlwp_bind/bindx #AsiaBSDCon
2018-03-09 20:37:58
Jun Ebihara
@ebijun
localcount(9): Reference counting without atomic operations #AsiaBSDCon
2018-03-09 20:39:05
Jun Ebihara
@ebijun
localcount_acquire/release: localcount_drain: wait until all references to a target object have been released #AsiaBSDCon
2018-03-09 20:39:58
Jun Ebihara
@ebijun
Examples of Deadlocks: pserialize_perform and callout/localcount_drain #AsiaBSDCon
2018-03-09 20:40:43
Jun Ebihara
@ebijun
pserialize_perform and callout:softnet_lock=>pserialize_perform=>kpause=>callout=>softnet_lock #AsiaBSDCon
2018-03-09 20:41:28
Jun Ebihara
@ebijun
pserialize_perform and callout: kpause sleeps a specified period by using callout(9) #AsiaBSDCon
2018-03-09 20:42:53
Jun Ebihara
@ebijun
softnet_lock => pserialize_perform => kpause => callout => softnet_lock ::: loop #AsiaBSDCon
2018-03-09 20:44:08
Peter N. M. Hansteen @pitrh@mastodon.social
@pitrh
ICYMI, the #OpenBSD PF and networking tutorial at @asiabsdcon 2018 slides are no online at home.nuug.no/~peter/pftutor… - labs closing, sorry. Next scheduled session (with labs) is at @bsdcan 2018 in June, Ping me or @stucchimax if you have #PFtutorial needs.
2018-03-09 20:44:37
Jun Ebihara
@ebijun
localcount and pserialize_perform: localcount_drain->xc->mtx->pserialize_perform->xc:: #AsiaBSDCon
2018-03-09 20:45:28
Jun Ebihara
@ebijun
mutex_enter - PSLIST_REMOVE-pserialize_perform-localcount_drain-mutex_exit: #AsiaBSDCon
2018-03-09 20:47:05
Jun Ebihara
@ebijun
xcall bug:fixed,Typical usage:xc_wait : xcall manages xc_headp and xc_donep #AsiaBSDCon
2018-03-09 20:49:09
Jun Ebihara
@ebijun
bug:xc_donep++ was done before executing a callback: xc_wait can return before the last request has been done. #AsiaBSDCon
2018-03-09 20:50:46
Jun Ebihara
@ebijun
curlwp_bind and LWP migration: curlwp_bind and psref: #AsiaBSDCon
2018-03-09 20:51:41
Jun Ebihara
@ebijun
psref_release has an assetion that checks whether a current LWP hadnt migrated. #AsiaBSDCon
2018-03-09 20:52:23
Jun Ebihara
@ebijun
curlwp_bind:: LP_BOUND flags to the current LWP:suppress a migration;: #AsiaBSDCon
2018-03-09 20:53:13