39
40
41
42
43
44
45
46
47
48
49
50
51
52
|
extras
hostinfo
ports
posix
files
data-structures
tcp
))
(chicken-5
(import chicken.base
chicken.condition
chicken.file
chicken.pathname
|
>
|
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
|
extras
hostinfo
ports
posix
files
data-structures
directory-utils
tcp
))
(chicken-5
(import chicken.base
chicken.condition
chicken.file
chicken.pathname
|
1126
1127
1128
1129
1130
1131
1132
1133
1134
|
(sort (get-all-ips) ip-pref-less?))
(define (get-all-ips)
(map address-info-host
(filter (lambda (x)
(equal? (address-info-type x) "tcp"))
(address-infos (get-host-name)))))
)
|
>
>
>
|
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
|
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
|
(sort (get-all-ips) ip-pref-less?))
(define (get-all-ips)
(map address-info-host
(filter (lambda (x)
(equal? (address-info-type x) "tcp"))
(address-infos (get-host-name)))))
;;======================================================================
;; Other Utils
;;======================================================================
(defstruct jstats
(count 0)
(jcount (make-hash-table)) ;; 1.db => journal_count
)
;; timeblk => jstats
(define *journal-stats* #f) ;; (make-hash-table))
(define *journal-stats-enable* #t) ;; change to #f to turn off
;; monte-carlo-esque random sampling of journal files
;; for all the files:
;; if .journal
;; update stats +1 +1
;; update stats +1 0
;;
(define (tt:write-load-tracking dbdir)
(if *journal-stats-enable*
(let* ((cs (current-seconds))
(key (inexact->exact (quotient cs 10)))
(old (- key 5)) ;; 4 x 10 seconds ago
(jstat (if (hash-table-exists? *journal-stats* key)
(hash-table-ref *journal-stats* key )
(let ((new (make-jstats)))
(hash-table-set! *journal-stats* key new)
new))))
;; clear out old records
(for-each
(lambda (key)
(if (< key old)
(hash-table-delete! *journal-stats* key)))
(hash-table-keys *journal-stats*))
;; increment our count of observations
(jstats-count-set! jstat (+ (jstats-count jstat) 1))
;; now find and increment journal file counts
(directory-fold
(lambda (fname res)
;; is it a journal file?
(let ((parts (string-match "^(.*\\.db)-journal.*" fname)))
(match parts
((_ dbfname)
(hash-table-set! (jstats-jcount jstat) dbfname
(+ (hash-table-ref/default (jstats-jcount jstat) dbfname 0) 1.0)
))
(else #f)
)))
'()
dbdir
))))
(define *journal-stats-mutex* (make-mutex))
(define (tt:journal-stats-run dbdir)
(if (not *journal-stats*)(set! *journal-stats* (make-hash-table)))
(let loop ()
(mutex-lock! *journal-stats-mutex*)
(tt:write-load-tracking dbdir)
(mutex-unlock! *journal-stats-mutex*)
(thread-sleep! (/ (random 1000) 100.0))
(loop)))
;; call this to start a thread that is keeping the journal-stats up to date.
(define (tt:start-stats dbdir)
(thread-start!
(make-thread
(lambda ()(tt:journal-stats-run dbdir)) "Journal stats collection thread")))
(define (tt:get-journal-stats #!optional (dbfname #f))
(let* ((result (make-jstats))
(hitcounts (jstats-jcount result)))
(if (and *journal-stats*
*journal-stats-enable*)
(begin
(mutex-lock! *journal-stats-mutex*)
(hash-table-for-each
*journal-stats*
(lambda (k v) ;; key jstats
(let* ((count (jstats-count v))
(jcount (jstats-jcount v))) ;; dbfname => hit count
(jstats-count-set! result
(+ (jstats-count result)
(jstats-count v)))
(hash-table-for-each
jcount
(lambda (dbfname hit-count)
(hash-table-set! hitcounts dbfname
(+ hit-count
(hash-table-ref/default hitcounts dbfname 0))))))))
(mutex-unlock! *journal-stats-mutex*))
(debug:print 0 *default-log-port* "INFO: *journal-stats* not set."))
;; convert to normalized alist
(let* ((tot (max (jstats-count result) 1)) ;; avoid divide by zero
(hits (jstats-jcount result)) ;; 1.db => count
(res (hash-table-map
hits
(lambda (fname hitcount)
(cons fname (/ hitcount tot))))))
(if dbfname
(or (alist-ref dbfname res equal?) 0)
res))))
;; megatest> (import tcp-transportmod)
;; megatest> (tt:write-load-tracking ".mtdb")
;; megatest> (hash-table-keys *journal-stats*)
;; (172060297)
;; megatest> (jstats->alist (hash-table-ref *journal-stats* 172060297))
;; ((count . 1) (jcount . #<hash-table (1)>))
;; megatest> (jstats-jcount (hash-table-ref *journal-stats* 172060297))
;; #<hash-table (1)>
;; megatest> (hash-table->alist (jstats-jcount (hash-table-ref *journal-stats* 172060297)))
;; (("1.db" . 4))
)
|