== sanity test 255a: check 'lfs ladvise -a willread' ===== 02:58:49 (1786949929)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.7172 s, 7.6 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-ffff8d74c2e86000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.319064
Iter 1/10: OSS cache speed: 0.348899
Iter 1/10: ladvise speed: 0.327825
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.312683
Iter 2/10: OSS cache speed: 0.314474
Iter 2/10: ladvise speed: 0.309549
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.292423
Iter 3/10: OSS cache speed: 0.291395
Iter 3/10: ladvise speed: 0.279302
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.338847
Iter 4/10: OSS cache speed: 0.318523
Iter 4/10: ladvise speed: 0.344821
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.28892
Iter 5/10: OSS cache speed: 0.309549
Iter 5/10: ladvise speed: 0.292347
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.305458
Iter 6/10: OSS cache speed: 0.320645
Iter 6/10: ladvise speed: 0.358787
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.265456
Iter 7/10: OSS cache speed: 0.350712
Iter 7/10: ladvise speed: 0.314515
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.328317
Iter 8/10: OSS cache speed: 0.354607
Iter 8/10: ladvise speed: 0.28496
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.296161
Iter 9/10: OSS cache speed: 0.291026
Iter 9/10: ladvise speed: 0.27752
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.2982
Iter 10/10: OSS cache speed: 0.299927
Iter 10/10: ladvise speed: 0.301182
Average uncached read: .30
Average speedup with OSS cached read:  .31 = +3%
Average speedup with ladvise willread:  .30 = +0%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0