Ferenc Wagner <wferi@xxxxxxx> writes: > So I've got the impression that flock is slower than fcntl locking. > The difference probably erodes with greater number of files, both > being equally slow. I must be missing something, it's just the > opposite of what you suggest. For bigger file lists flock seems indeed faster, although not that much. I'd like to see the 500-file fcntl behaviour in the 10000-file regime. Is that possible with proper tuning of the DLM #defines for example? I'll make some random changes, but would appreciate some guidance. Regards, Feri. FLOCK: filecount=500 iteration=0 elapsed time=10.326359 s iteration=1 elapsed time=10.470205 s iteration=2 elapsed time=10.302251 s iteration=3 elapsed time=10.302252 s iteration=4 elapsed time=10.562203 s total elapsed time=51.96327 s filecount=1000 iteration=0 elapsed time=21.540327 s iteration=1 elapsed time=21.522852 s iteration=2 elapsed time=21.860283 s iteration=3 elapsed time=21.196407 s iteration=4 elapsed time=21.420367 s total elapsed time=107.540236 s filecount=2000 iteration=0 elapsed time=46.920414 s iteration=1 elapsed time=42.492109 s iteration=2 elapsed time=42.864716 s iteration=3 elapsed time=43.092679 s iteration=4 elapsed time=43.556623 s total elapsed time=218.926541 s filecount=5000 iteration=0 elapsed time=115.27529 s iteration=1 elapsed time=102.525867 s iteration=2 elapsed time=102.666411 s iteration=3 elapsed time=104.190295 s iteration=4 elapsed time=105.114153 s total elapsed time=529.772016 s FCNTL: filecount=500 iteration=0 elapsed time=9.634164 s iteration=1 elapsed time=0.203278 s iteration=2 elapsed time=0.204565 s iteration=3 elapsed time=0.203895 s iteration=4 elapsed time=0.203649 s total elapsed time=10.449551 s filecount=1000 iteration=0 elapsed time=16.111548 s iteration=1 elapsed time=27.165518 s iteration=2 elapsed time=25.927519 s iteration=3 elapsed time=22.904105 s iteration=4 elapsed time=23.176309 s total elapsed time=115.284999 s filecount=2000 iteration=0 elapsed time=46.482252 s iteration=1 elapsed time=50.130122 s iteration=2 elapsed time=45.76822 s iteration=3 elapsed time=52.462871 s iteration=4 elapsed time=56.386634 s total elapsed time=251.230099 s filecount=5000 iteration=0 elapsed time=125.121509 s iteration=1 elapsed time=131.344402 s iteration=2 elapsed time=120.272978 s iteration=3 elapsed time=126.29043 s iteration=4 elapsed time=131.561647 s total elapsed time=634.590966 s -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
