1 ;;;; miscellaneous tests of thread stuff
3 ;;;; This software is part of the SBCL system. See the README file for
6 ;;;; While most of SBCL is derived from the CMU CL system, the test
7 ;;;; files (like this one) were written from scratch after the fork
10 ;;;; This software is in the public domain and is provided with
11 ;;;; absoluely no warranty. See the COPYING and CREDITS files for
12 ;;;; more information.
14 #-sb-thread (quit :unix-status 104)
16 (in-package "SB-THREAD") ; this is white-box testing, really
18 ;;; We had appalling scaling properties for a while. Make sure they
20 (defun scaling-test (function &optional (nthreads 5))
21 "Execute FUNCTION with NTHREADS lurking to slow it down."
22 (let ((queue (sb-thread:make-waitqueue))
23 (mutex (sb-thread:make-mutex)))
24 ;; Start NTHREADS idle threads.
26 (sb-thread:make-thread (lambda ()
27 (sb-thread:condition-wait queue mutex)
29 (let ((start-time (get-internal-run-time)))
31 (prog1 (- (get-internal-run-time) start-time)
32 (sb-thread:condition-broadcast queue)))))
34 "A function that does work with the CPU."
35 (if (zerop n) 1 (* n (fact (1- n)))))
36 (let ((work (lambda () (fact 15000))))
37 (let ((zero (scaling-test work 0))
38 (four (scaling-test work 4)))
39 ;; a slightly weak assertion, but good enough for starters.
40 (assert (< four (* 1.5 zero)))))
42 ;;; For one of the interupt-thread tests, we want a foreign function
43 ;;; that does not make syscalls
45 (with-open-file (o "threads-foreign.c" :direction :output :if-exists :supersede)
46 (format o "void loop_forever() { while(1) ; }~%"))
49 (or #+linux '("-shared" "-o" "threads-foreign.so" "threads-foreign.c")
50 (error "Missing shared library compilation options for this platform"))
52 (sb-alien:load-shared-object "threads-foreign.so")
53 (sb-alien:define-alien-routine loop-forever sb-alien:void)
56 ;;; elementary "can we get a lock and release it again"
57 (let ((l (make-mutex :name "foo"))
58 (p (current-thread-id)))
59 (assert (eql (mutex-value l) nil) nil "1")
60 (assert (eql (mutex-lock l) 0) nil "2")
61 (sb-thread:get-mutex l)
62 (assert (eql (mutex-value l) p) nil "3")
63 (assert (eql (mutex-lock l) 0) nil "4")
64 (sb-thread:release-mutex l)
65 (assert (eql (mutex-value l) nil) nil "5")
66 (assert (eql (mutex-lock l) 0) nil "6")
69 ;; test that SLEEP actually sleeps for at least the given time, even
70 ;; if interrupted by another thread exiting/a gc/anything
71 (let ((start-time (get-universal-time)))
72 (make-thread (lambda () (sleep 1))) ; kid waits 1 then dies ->SIG_THREAD_EXIT
74 (assert (>= (get-universal-time) (+ 5 start-time))))
77 (let ((queue (make-waitqueue :name "queue"))
78 (lock (make-mutex :name "lock")))
79 (labels ((in-new-thread ()
81 (assert (eql (mutex-value lock) (current-thread-id)))
82 (format t "~A got mutex~%" (current-thread-id))
83 ;; now drop it and sleep
84 (condition-wait queue lock)
85 ;; after waking we should have the lock again
86 (assert (eql (mutex-value lock) (current-thread-id))))))
87 (make-thread #'in-new-thread)
88 (sleep 2) ; give it a chance to start
89 ;; check the lock is free while it's asleep
90 (format t "parent thread ~A~%" (current-thread-id))
91 (assert (eql (mutex-value lock) nil))
92 (assert (eql (mutex-lock lock) 0))
94 (condition-notify queue))
97 (let ((queue (make-waitqueue :name "queue"))
98 (lock (make-mutex :name "lock")))
99 (labels ((ours-p (value)
100 (sb-vm:control-stack-pointer-valid-p
101 (sb-sys:int-sap (sb-kernel:get-lisp-obj-address value))))
103 (with-recursive-lock (lock)
104 (assert (ours-p (mutex-value lock)))
105 (format t "~A got mutex~%" (mutex-value lock))
106 ;; now drop it and sleep
107 (condition-wait queue lock)
108 ;; after waking we should have the lock again
109 (format t "woken, ~A got mutex~%" (mutex-value lock))
110 (assert (ours-p (mutex-value lock))))))
111 (make-thread #'in-new-thread)
112 (sleep 2) ; give it a chance to start
113 ;; check the lock is free while it's asleep
114 (format t "parent thread ~A~%" (current-thread-id))
115 (assert (eql (mutex-value lock) nil))
116 (assert (eql (mutex-lock lock) 0))
117 (with-recursive-lock (lock)
118 (condition-notify queue))
121 (let ((mutex (make-mutex :name "contended")))
123 (let ((me (current-thread-id)))
127 (assert (eql (mutex-value mutex) me)))
128 (assert (not (eql (mutex-value mutex) me))))
129 (format t "done ~A~%" (current-thread-id)))))
130 (let ((kid1 (make-thread #'run))
131 (kid2 (make-thread #'run)))
132 (format t "contention ~A ~A~%" kid1 kid2))))
134 (defun test-interrupt (function-to-interrupt &optional quit-p)
135 (let ((child (make-thread function-to-interrupt)))
136 ;;(format t "gdb ./src/runtime/sbcl ~A~%attach ~A~%" child child)
138 (format t "interrupting child ~A~%" child)
139 (interrupt-thread child
141 (format t "child pid ~A~%" (current-thread-id))
142 (when quit-p (sb-ext:quit))))
146 ;;; separate tests for (a) interrupting Lisp code, (b) C code, (c) a syscall,
147 ;;; (d) waiting on a lock, (e) some code which we hope is likely to be
150 (let ((child (test-interrupt (lambda () (loop))))) (terminate-thread child))
152 (test-interrupt #'loop-forever :quit)
154 (let ((child (test-interrupt (lambda () (loop (sleep 2000))))))
155 ;; Interrupting a sleep form causes it to return early. Welcome to Unix.
156 ;; Just to be sure our LOOP form works, let's check the child is still
158 (assert (zerop (sb-unix:unix-kill child 0)))
159 (terminate-thread child))
161 (let ((lock (make-mutex :name "loctite"))
164 (setf child (test-interrupt
167 (assert (eql (mutex-value lock) (current-thread-id))))
168 (assert (not (eql (mutex-value lock) (current-thread-id))))
170 ;;hold onto lock for long enough that child can't get it immediately
172 (interrupt-thread child (lambda () (format t "l ~A~%" (mutex-value lock))))
173 (format t "parent releasing lock~%"))
174 (terminate-thread child))
176 (defun alloc-stuff () (copy-list '(1 2 3 4 5)))
178 (let ((c (test-interrupt (lambda () (loop (alloc-stuff))))))
179 ;; NB this only works on x86: other ports don't have a symbol for
180 ;; pseudo-atomic atomicity
181 (format t "new thread ~A~%" c)
186 (princ ".") (force-output)
187 (assert (zerop SB-KERNEL:*PSEUDO-ATOMIC-ATOMIC*)))))
188 (terminate-thread c))
190 (format t "~&interrupt test done~%")
193 (make-thread (lambda ()
195 (sb-ext:gc) (princ "\\") (force-output) )
197 (make-thread (lambda ()
200 (princ "/") (force-output))
203 (when (and a-done b-done) (return))
206 (defun waste (&optional (n 100000))
207 (loop repeat n do (make-string 16384)))
209 (loop for i below 100 do
210 (format t "LOOP:~A~%" i)
212 (sb-thread:make-thread
218 (defparameter *aaa* nil)
219 (loop for i below 100 do
220 (format t "LOOP:~A~%" i)
222 (sb-thread:make-thread
224 (let ((*aaa* (waste)))
226 (let ((*aaa* (waste)))
230 (format t "~&gc test done~%")
232 #| ;; a cll post from eric marsden
234 | (setq *debugger-hook*
235 | (lambda (condition old-debugger-hook)
236 | (debug:backtrace 10)
237 | (unix:unix-exit 2)))
239 | (mp::start-sigalrm-yield)
240 | (flet ((roomy () (loop (with-output-to-string (*standard-output*) (room)))))
241 | (mp:make-process #'roomy)
242 | (mp:make-process #'roomy)))
245 ;; give the other thread time to die before we leave, otherwise the
246 ;; overall exit status is 0, not 104
249 (sb-ext:quit :unix-status 104)