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optimize disk I/O elevator algorithm to spend less time picking job

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Arvid Norberg
2010-01-12 01:56:48 +00:00
parent c76ebe23c7
commit a1299c3a10
6 changed files with 174 additions and 163 deletions
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14
parse_disk_log.py
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@@ -11,7 +11,11 @@ if len(sys.argv) < 2:
print "usage: parse_disk_log.py logfile [seconds]"
sys.exit(1)
keys = ['write', 'read', 'hash', 'move', 'release', 'idle', 'delete', 'check_fastresume', 'check_files', 'clear-cache', 'abort_thread', 'abort_torrent', 'save_resume_data', 'rename_file', 'flushing', 'update_settings']
keys = ['write', 'read', 'hash', 'move', 'release', 'idle', \
'delete', 'check_fastresume', 'check_files', 'clear-cache', \
'abort_thread', 'abort_torrent', 'save_resume_data', 'rename_file', \
'flushing', 'update_settings', 'finalize_file', 'sorting_job', \
'check_cache_hit']
throughput_keys = ['write', 'read']
# logfile format:
@@ -21,9 +25,9 @@ throughput_keys = ['write', 'read']
# 34722 write
if len(sys.argv) > 2:
quantization = long(sys.argv[2]) * 1000
quantization = long(sys.argv[2]) * 1000000
else:
quantization = 5000
quantization = 500000
out = open('disk_io.dat', 'wb')
out2 = open('disk_throughput.dat', 'wb')
@@ -86,7 +90,7 @@ out = open('disk_io.gnuplot', 'wb')
print >>out, "set term png size 1200,700"
print >>out, 'set output "disk_throughput.png"'
print >>out, 'set title "disk throughput per %s second(s)"' % (quantization / 1000)
print >>out, 'set title "disk throughput per %f second(s)"' % (quantization / 1000000.f)
print >>out, 'set ylabel "throughput (kB/s)"'
print >>out, 'plot',
i = 0
@@ -98,7 +102,7 @@ print >>out, 'x=0'
print >>out, 'set output "disk_io.png"'
print >>out, 'set ylabel "utilization (%)"'
print >>out, 'set xrange [0:*]'
print >>out, 'set title "disk io utilization per %s second(s)"' % (quantization / 1000)
print >>out, 'set title "disk io utilization per %f second(s)"' % (quantization / 1000000.f)
print >>out, "set key box"
print >>out, "set style data histogram"
print >>out, "set style histogram rowstacked"