== sanity test 255a: check 'lfs ladvise -a willread' ===== 07:04:22 (1756811062)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 7.81863 s, 13.4 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-ffff893989b26800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.48942
Iter 1/10: OSS cache speed: 0.460416
Iter 1/10: ladvise speed: 0.506621
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.47577
Iter 2/10: OSS cache speed: 0.52137
Iter 2/10: ladvise speed: 0.536833
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.534921
Iter 3/10: OSS cache speed: 0.479682
Iter 3/10: ladvise speed: 0.626346
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.623445
Iter 4/10: OSS cache speed: 0.740263
Iter 4/10: ladvise speed: 0.788493
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.726542
Iter 5/10: OSS cache speed: 0.833374
Iter 5/10: ladvise speed: 1.00635
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.07655
Iter 6/10: OSS cache speed: 1.05731
Iter 6/10: ladvise speed: 0.953312
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.24685
Iter 7/10: OSS cache speed: 1.26663
Iter 7/10: ladvise speed: 1.26366
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.23907
Iter 8/10: OSS cache speed: 0.860473
Iter 8/10: ladvise speed: 0.994193
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.20859
Iter 9/10: OSS cache speed: 1.63495
Iter 9/10: ladvise speed: 1.65055
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.88662
Iter 10/10: OSS cache speed: 2.02254
Iter 10/10: ladvise speed: 1.95559
Average uncached read: .95
Average speedup with OSS cached read:  .98 = +3%
Average speedup with ladvise willread:  1.02 = +7%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0