== sanity test 255a: check 'lfs ladvise -a willread' ===== 14:39:00 (1788287940)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.972 s, 8.1 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-ffff89d80630f800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.335936
Iter 1/10: OSS cache speed: 0.40255
Iter 1/10: ladvise speed: 0.420898
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.329883
Iter 2/10: OSS cache speed: 0.433134
Iter 2/10: ladvise speed: 0.343248
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.393162
Iter 3/10: OSS cache speed: 0.444759
Iter 3/10: ladvise speed: 0.420729
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.396664
Iter 4/10: OSS cache speed: 0.433438
Iter 4/10: ladvise speed: 0.395765
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.333413
Iter 5/10: OSS cache speed: 0.358
Iter 5/10: ladvise speed: 0.313945
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.299157
Iter 6/10: OSS cache speed: 0.302343
Iter 6/10: ladvise speed: 0.370688
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.329768
Iter 7/10: OSS cache speed: 0.384646
Iter 7/10: ladvise speed: 0.385706
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.362216
Iter 8/10: OSS cache speed: 0.365753
Iter 8/10: ladvise speed: 0.407365
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.367252
Iter 9/10: OSS cache speed: 0.374491
Iter 9/10: ladvise speed: 0.398158
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.368667
Iter 10/10: OSS cache speed: 0.351948
Iter 10/10: ladvise speed: 0.415489
Average uncached read: .35
Average speedup with OSS cached read:  .38 = +8%
Average speedup with ladvise willread:  .38 = +8%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0