== sanity test 255a: check 'lfs ladvise -a willread' ===== 09:15:09 (1789305309)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 8.54328 s, 12.3 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
llite.lustre-ffff9dbfc50a4800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.520248
Iter 1/10: OSS cache speed: 0.471417
Iter 1/10: ladvise speed: 0.55649
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.607455
Iter 2/10: OSS cache speed: 0.622619
Iter 2/10: ladvise speed: 0.628136
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.621315
Iter 3/10: OSS cache speed: 0.644364
Iter 3/10: ladvise speed: 0.586275
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.678778
Iter 4/10: OSS cache speed: 0.633451
Iter 4/10: ladvise speed: 0.602558
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.6414
Iter 5/10: OSS cache speed: 0.735703
Iter 5/10: ladvise speed: 0.753079
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.931714
Iter 6/10: OSS cache speed: 0.969709
Iter 6/10: ladvise speed: 0.930908
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.02537
Iter 7/10: OSS cache speed: 0.920628
Iter 7/10: ladvise speed: 1.34222
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.69121
Iter 8/10: OSS cache speed: 1.21699
Iter 8/10: ladvise speed: 1.10244
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.51552
Iter 9/10: OSS cache speed: 2.02825
Iter 9/10: ladvise speed: 1.94422
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.57914
Iter 10/10: OSS cache speed: 1.7827
Iter 10/10: ladvise speed: 2.14095
Average uncached read: .98
Average speedup with OSS cached read:  1.00 = +2%
Average speedup with ladvise willread:  1.05 = +7%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0