== sanity test 255a: check 'lfs ladvise -a willread' ===== 14:58:10 (1775761090)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.3938 s, 8.5 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-ffff9966c71a1800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.389589
Iter 1/10: OSS cache speed: 0.398846
Iter 1/10: ladvise speed: 0.410181
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.366208
Iter 2/10: OSS cache speed: 0.334891
Iter 2/10: ladvise speed: 0.325289
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.379924
Iter 3/10: OSS cache speed: 0.293206
Iter 3/10: ladvise speed: 0.373448
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.35556
Iter 4/10: OSS cache speed: 0.240199
Iter 4/10: ladvise speed: 0.337237
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.319945
Iter 5/10: OSS cache speed: 0.368739
Iter 5/10: ladvise speed: 0.304172
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.30578
Iter 6/10: OSS cache speed: 0.347443
Iter 6/10: ladvise speed: 0.301362
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.324433
Iter 7/10: OSS cache speed: 0.326379
Iter 7/10: ladvise speed: 0.308887
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.303532
Iter 8/10: OSS cache speed: 0.324532
Iter 8/10: ladvise speed: 0.269951
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.36488
Iter 9/10: OSS cache speed: 0.362795
Iter 9/10: ladvise speed: 0.338769
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.350807
Iter 10/10: OSS cache speed: 0.350573
Iter 10/10: ladvise speed: 0.378294
Average uncached read: .34
Average speedup with OSS cached read:  .33 = +-2%
Average speedup with ladvise willread:  .33 = +-2%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0