== sanity test 255a: check 'lfs ladvise -a willread' ===== 05:58:58 (1765105138)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.09117 s, 17.2 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-ffff9e25c7856800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.85118
Iter 1/10: OSS cache speed: 2.00536
Iter 1/10: ladvise speed: 1.74746
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.64661
Iter 2/10: OSS cache speed: 1.87607
Iter 2/10: ladvise speed: 1.95202
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.09653
Iter 3/10: OSS cache speed: 2.02288
Iter 3/10: ladvise speed: 2.15953
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.16112
Iter 4/10: OSS cache speed: 2.16549
Iter 4/10: ladvise speed: 2.19891
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.17787
Iter 5/10: OSS cache speed: 2.21532
Iter 5/10: ladvise speed: 2.15985
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.09528
Iter 6/10: OSS cache speed: 2.30036
Iter 6/10: ladvise speed: 2.06832
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.10082
Iter 7/10: OSS cache speed: 2.08655
Iter 7/10: ladvise speed: 2.17627
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.09911
Iter 8/10: OSS cache speed: 2.11098
Iter 8/10: ladvise speed: 2.15293
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.94452
Iter 9/10: OSS cache speed: 2.1006
Iter 9/10: ladvise speed: 2.00266
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.02139
Iter 10/10: OSS cache speed: 2.05177
Iter 10/10: ladvise speed: 2.20365
Average uncached read: 2.01
Average speedup with OSS cached read:  2.09 = +3%
Average speedup with ladvise willread:  2.08 = +3%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0