== sanity test 255a: check 'lfs ladvise -a willread' ===== 15:59:55 (1710100795)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 3.09202 s, 33.9 MB/s
ladvise: range [2, 1] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: range [2, 2] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: conflicting arguments of -l and -e
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

Synchronous ladvise should wait
fail_val=8
fail_loc=0x237
Asynchronous ladvise shouldn't wait
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.11765
Iter 1/10: OSS cache speed: 0.164968
Iter 1/10: ladvise speed: 0.0717707
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.145143
Iter 2/10: OSS cache speed: 0.0109237
Iter 2/10: ladvise speed: 0.0165278
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.0736523
Iter 3/10: OSS cache speed: 0.0756258
Iter 3/10: ladvise speed: 0.0475636
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.0725363
Iter 4/10: OSS cache speed: 0.0426254
Iter 4/10: ladvise speed: 0.13451
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.138921
Iter 5/10: OSS cache speed: 0.0860237
Iter 5/10: ladvise speed: 0.116739
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.128634
Iter 6/10: OSS cache speed: 0.0718083
Iter 6/10: ladvise speed: 0.0912569
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.0933398
Iter 7/10: OSS cache speed: 0.150902
Iter 7/10: ladvise speed: 0.226051
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.0499103
Iter 8/10: OSS cache speed: 0.195526
Iter 8/10: ladvise speed: 0.12742
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.128272
Iter 9/10: OSS cache speed: 0.0511115
Iter 9/10: ladvise speed: 0.104931
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.625344
Iter 10/10: OSS cache speed: 1.4079
Iter 10/10: ladvise speed: 2.1063
Average uncached read: .15
Average speedup with OSS cached read: .22 = +46.66%
Average speedup with ladvise willread: .30 = +100.00%
fail_loc=0