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Removing connection mutex

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svn: r6656
This commit is contained in:
Jay McCarthy 2007-06-14 02:40:28 +00:00
parent 9d425a0bbf
commit 31999c4898
9 changed files with 84 additions and 82 deletions
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10
collects/web-server/bench/NOTES
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@ -1,3 +1,13 @@
* data/1181788603.ss
Removing all references to semaphores doesn't change much.
* data/1181787772.ss
Removing the semaphores on connections---no longer needed---
seems to improve the average case. 12ms were cut off. The
memory usage seems strange.
* data/1181686382.ss
The memory-usage data implies that there is a leak

1
collects/web-server/bench/data/1181787772.ss Normal file
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@ -0,0 +1 @@
(benchmark (cmd "ab -c 10 -t 120 -e /tmp/mztmp1181787597671591189 http://localhost:9480/file") (timing (start 1181787597) (stop 1181787717) (shutdown 1181787772)) (memory-usage (mzscheme (before 15501312) (after 271469624) (after-gc 240140744)) (server (before 11486956) (after 11767936) (after-gc 11737348))) (response-times (1.0 5.0 5.0 6.0 6.0 7.0 7.0 7.0 8.0 8.0 8.0 9.0 9.0 9.0 10.0 10.0 10.0 11.0 11.0 11.0 12.0 12.0 12.0 13.0 13.0 13.0 14.0 14.0 14.0 15.0 15.0 15.0 16.0 16.0 17.0 17.0 17.0 18.0 18.0 18.0 19.0 19.0 20.0 20.0 20.0 21.0 21.0 21.0 22.0 22.0 23.0 23.0 24.0 24.0 25.0 25.0 26.0 26.0 27.0 27.0 28.0 28.0 29.0 29.0 29.0 30.0 30.0 31.0 31.0 32.0 33.0 33.0 34.0 35.0 35.0 36.0 37.0 38.0 38.0 39.0 40.0 41.0 42.0 42.0 43.0 45.0 46.0 47.0 49.0 50.0 51.0 53.0 55.0 58.0 61.0 64.0 69.0 78.0 99.0 284.0)))

1
collects/web-server/bench/data/1181788603.ss Normal file
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@ -0,0 +1 @@
(benchmark (cmd "ab -c 10 -t 120 -e /tmp/mztmp1181788425672419526 http://localhost:9480/file") (timing (start 1181788425) (stop 1181788546) (shutdown 1181788603)) (memory-usage (mzscheme (before 15474656) (after 256099040) (after-gc 246890536)) (server (before 11476576) (after 238827648) (after-gc 239474740))) (response-times (1.0 5.0 5.0 6.0 6.0 7.0 7.0 7.0 8.0 8.0 8.0 8.0 9.0 9.0 9.0 10.0 10.0 10.0 10.0 11.0 11.0 11.0 12.0 12.0 12.0 13.0 13.0 14.0 14.0 14.0 15.0 15.0 15.0 16.0 16.0 17.0 17.0 17.0 18.0 18.0 19.0 19.0 19.0 20.0 20.0 21.0 21.0 22.0 22.0 22.0 23.0 23.0 24.0 24.0 25.0 25.0 26.0 26.0 27.0 27.0 28.0 28.0 29.0 29.0 29.0 30.0 30.0 31.0 31.0 32.0 32.0 33.0 34.0 34.0 35.0 36.0 37.0 38.0 38.0 39.0 40.0 41.0 41.0 42.0 43.0 44.0 46.0 47.0 48.0 50.0 51.0 53.0 55.0 57.0 60.0 63.0 68.0 77.0 104.0 291.0)))

7
collects/web-server/docs/reference/private.scrbl
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@ -66,12 +66,11 @@ for doing this.
@defstruct[connection
([timer timer?]
[i-port input-port?] [o-port output-port?] [custodian custodian?]
[close? boolean?] [mutex semaphore?])]{
[close? boolean?])]{
A connection is a pair of ports (@scheme[i-port] and @scheme[o-port]) that is
ready to close after the current job if @scheme[close?] is @scheme[#t]. Resources
associated with the connection should be allocated under @scheme[custodian] and
locked by @scheme[mutex]---including access to the ports. The connection will last
until @scheme[timer] triggers.
associated with the connection should be allocated under @scheme[custodian].
The connection will last until @scheme[timer] triggers.
}
@; XXX Don't pass in parent-cust

10
collects/web-server/private/connection-manager.ss
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@ -2,14 +2,11 @@
(require (lib "contract.ss")
"timer.ss")
(define-struct connection (timer i-port o-port custodian close? mutex)
(make-inspector))
(define-struct connection (timer i-port o-port custodian close?))
(provide/contract
[struct connection
([timer timer?]
[i-port input-port?] [o-port output-port?] [custodian custodian?]
[close? boolean?] [mutex semaphore?])]
([timer timer?] [i-port input-port?] [o-port output-port?] [custodian custodian?] [close? boolean?])]
[start-connection-manager (custodian? . -> . void)]
[new-connection (number? input-port? output-port? custodian? boolean? . -> . connection?)]
[kill-connection! (connection? . -> . void)]
@ -27,8 +24,7 @@
(make-connection
(start-timer time-to-live
(lambda () (kill-connection! conn)))
i-port o-port cust close?
(make-semaphore 1))])
i-port o-port cust close?)])
conn))
;; kill-connection!: connection -> void

5
collects/web-server/private/request.ss
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@ -16,9 +16,6 @@
;; read the request line, and the headers, determine if the connection should
;; be closed after servicing the request and build a request structure
(define (read-request conn host-port port-addresses)
(call-with-semaphore
(connection-mutex conn)
(lambda ()
(define ip
(connection-i-port conn))
(define-values (method uri major minor)
@ -41,7 +38,7 @@
(make-request method uri headers bindings raw-post-data
host-ip host-port client-ip)
(close-connection? headers major minor
client-ip host-ip)))))
client-ip host-ip)))
;; **************************************************
;; close-connection?

4
collects/web-server/private/response.ss
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@ -176,10 +176,8 @@
(with-handlers ([exn? (lambda (exn)
(kill-connection! conn)
(raise exn))])
(call-with-semaphore (connection-mutex conn)
(lambda ()
(apply f conn args)
(flush-output (connection-o-port conn))))))))
(flush-output (connection-o-port conn))))))
(define ext:output-response
(ext:wrap output-response))

2
collects/web-server/tests/private/request-test.ss
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@ -19,7 +19,7 @@
[ip (open-input-bytes b)]
[op (open-output-bytes)])
(values (make-connection (make-timer ip +inf.0 (lambda () (void)))
ip op (make-custodian) #f (make-semaphore))
ip op (make-custodian) #f)
headers)))
(define (get-bindings post-data)

2
collects/web-server/tests/util.ss
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@ -31,7 +31,7 @@
(define ip (open-input-bytes ib))
(define op (open-output-bytes))
(values (make-connection (make-timer never-evt +inf.0 (lambda () (void)))
ip op (current-custodian) #f (make-semaphore 1))
ip op (current-custodian) #f)
ip
op))