a8da7e452f
frequency in the profiler that drracket starts up via the PLDRPROFILE environment variable
125 lines
4.2 KiB
Racket
125 lines
4.2 KiB
Racket
#lang racket/base
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(require racket/gui/base
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racket/class
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profile/sampler
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profile/render-text
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profile/analyzer
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framework/preferences)
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#|
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This file is loaded early in drscheme's startup when the PLTDRPROFILE
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environment variable is setup. It sets up a profiler to examine drscheme
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itself.
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|#
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(provide start-profile)
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(define (start-profile super-custodian)
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(define drs-custodian (current-custodian))
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(define drs-main-thread (current-thread))
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(define profile-eventspace
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(parameterize ([current-custodian super-custodian])
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(make-eventspace)))
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(define frame (parameterize ([current-eventspace profile-eventspace])
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(new frame% [label "Profiling"] [width 500] [height 550])))
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(define t (let ([t (new text%)])
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(send t lock #t)
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t))
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(define ec (new editor-canvas% [parent frame] [editor t]))
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(define bp (new horizontal-panel% [parent frame] [stretchable-height #f]))
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(define pause-b (new button% [label "Pause"] [parent bp] [callback (λ (a b) (pause))] [stretchable-width #t]))
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(define resume-b (new button% [label "Resume"] [parent bp] [callback (λ (a b) (resume))] [stretchable-width #t]))
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(define start-stop-b (new button% [label "Stop"] [parent bp] [callback (λ (a b) (start-stop))] [stretchable-width #t]))
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(define choice (new choice% [label #f] [choices '("12" "9")] [parent bp] [callback (λ (a b) (font-size))]))
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(define mb (new menu-bar% [parent frame]))
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(define edit-menu (new menu% [label "&Edit"] [parent mb]))
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(define sa (new menu-item%
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[parent edit-menu]
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[label "Select al&l"]
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[shortcut #\a]
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[callback (λ (x y)
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(send ec focus)
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(send t set-position 0 (send t last-position)))]))
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(define copy (new menu-item%
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[parent edit-menu]
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[label "&Copy"]
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[shortcut #\c]
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[callback (λ (x y) (send t copy))]))
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(define (font-size)
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(let ([n (send choice get-string-selection)])
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(when n
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(send sd set-delta 'change-size (string->number n))
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(update-profile-report))))
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(define (update-buttons)
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(send resume-b enable (and current-sampler (not running?)))
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(send pause-b enable (and current-sampler running?))
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(send start-stop-b set-label (if current-sampler
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"Stop"
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"Start")))
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(define running? #f)
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(define current-sampler #f)
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(define (start-sampler)
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(let ([s (create-sampler (list drs-custodian drs-main-thread)
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#e0.05
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super-custodian)])
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(set! current-sampler s)))
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(define (stop-sampler)
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(current-sampler 'stop)
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(set! current-sampler #f)
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(set! running? #f))
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(define sd (let ([sd (make-object style-delta%)])
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(send sd set-delta 'change-size 12)
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(send sd set-family 'modern)
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sd))
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(define updating-thread
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(parameterize ([current-custodian super-custodian]
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[current-eventspace profile-eventspace])
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(thread (λ ()
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(let loop ()
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(queue-callback update-profile-report)
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(sleep 5)
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(loop))))))
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(define (update-profile-report)
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(when current-sampler
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(send t begin-edit-sequence)
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(send t lock #f)
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(send t erase)
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(parameterize ([current-output-port (open-output-text-editor t)])
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(render (analyze-samples (current-sampler 'get-snapshots))))
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(send t change-style sd 0 (send t last-position))
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(send t set-position 0)
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(send t lock #t)
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(send t end-edit-sequence)))
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(define (resume)
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(set! running? #t)
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(current-sampler 'resume)
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(update-buttons))
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(define (pause)
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(set! running? #f)
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(current-sampler 'pause)
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(update-buttons)
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(update-profile-report))
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(define (start-stop)
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(cond
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[current-sampler (stop-sampler)]
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[else
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(start-sampler)
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(set! running? #t)])
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(update-profile-report)
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(update-buttons))
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(update-buttons)
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(send ec focus)
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(send frame show #t))
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