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;; get cpu load by reading from /proc/loadavg, return all three values
;;
(define (common:get-cpu-load)
(with-input-from-file "/proc/loadavg"
(lambda ()(list (read)(read)(read)))))
(define (common:wait-for-cpuload maxload numcpus waitdelay #!key (count 1000))
(let* ((loadavg (common:get-cpu-load))
(first (car loadavg))
(next (cadr loadavg))
(adjload (* maxload numcpus))
(loadjmp (- first next)))
(cond
((and (> first adjload)
(> count 0))
(debug:print-info 0 "waiting " waitdelay " seconds due to load " first " exceeding max of " adjload)
(thread-sleep! waitdelay)
(common:wait-for-cpuload maxload numcpus waitdelay count: (- count 1)))
((and (> loadjmp numcpus)
(> count 0))
(debug:print-info 0 "waiting " waitdelay " seconds due to load jump " loadjmp " > numcpus " numcpus)
(thread-sleep! waitdelay)
(common:wait-for-cpuload maxload numcpus waitdelay count: (- count 1))))))
(define (common:get-num-cpus)
(with-input-from-file "/proc/cpuinfo"
(lambda ()
(let loop ((numcpu 0)
(inl (read-line)))
(if (eof-object? inl)
numcpu
(loop (if (string-match "^processor\\s+:\\s+\\d+$" inl)
(+ numcpu 1)
numcpu)
(read-line)))))))
(define (get-uname . params)
(let* ((uname-res (cmd-run->list (conc "uname " (if (null? params) "-a" (car params)))))
(uname #f))
(if (null? (car uname-res))
"unknown"
(caar uname-res))))
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;; get cpu load by reading from /proc/loadavg, return all three values
;;
(define (common:get-cpu-load)
(with-input-from-file "/proc/loadavg"
(lambda ()(list (read)(read)(read)))))
(define (common:wait-for-cpuload maxload numcpus waitdelay #!key (count 1000) (msg #f))
(let* ((loadavg (common:get-cpu-load))
(first (car loadavg))
(next (cadr loadavg))
(adjload (* maxload numcpus))
(loadjmp (- first next)))
(cond
((and (> first adjload)
(> count 0))
(debug:print-info 0 "waiting " waitdelay " seconds due to load " first " exceeding max of " adjload (if msg msg ""))
(thread-sleep! waitdelay)
(common:wait-for-cpuload maxload numcpus waitdelay count: (- count 1)))
((and (> loadjmp numcpus)
(> count 0))
(debug:print-info 0 "waiting " waitdelay " seconds due to load jump " loadjmp " > numcpus " numcpus (if msg msg ""))
(thread-sleep! waitdelay)
(common:wait-for-cpuload maxload numcpus waitdelay count: (- count 1))))))
(define (common:get-num-cpus)
(with-input-from-file "/proc/cpuinfo"
(lambda ()
(let loop ((numcpu 0)
(inl (read-line)))
(if (eof-object? inl)
numcpu
(loop (if (string-match "^processor\\s+:\\s+\\d+$" inl)
(+ numcpu 1)
numcpu)
(read-line)))))))
;; wait for normalized cpu load to drop below maxload
;;
(define (common:wait-for-normalized-load maxload #!key (msg #f))
(let ((num-cpus (common:get-num-cpus)))
(common:wait-for-cpuload maxload num-cpus 15 msg: msg)))
(define (get-uname . params)
(let* ((uname-res (cmd-run->list (conc "uname " (if (null? params) "-a" (car params)))))
(uname #f))
(if (null? (car uname-res))
"unknown"
(caar uname-res))))
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