== sanity test 255a: check 'lfs ladvise -a willread' ===== 16:51:32 (1777582292)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.7548 s, 8.2 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-ffff9fb6900cd800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.318019
Iter 1/10: OSS cache speed: 0.349429
Iter 1/10: ladvise speed: 0.360355
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.32201
Iter 2/10: OSS cache speed: 0.345068
Iter 2/10: ladvise speed: 0.328348
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.319925
Iter 3/10: OSS cache speed: 0.337184
Iter 3/10: ladvise speed: 0.320577
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.265844
Iter 4/10: OSS cache speed: 0.340849
Iter 4/10: ladvise speed: 0.320211
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.299556
Iter 5/10: OSS cache speed: 0.345746
Iter 5/10: ladvise speed: 0.345603
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.300097
Iter 6/10: OSS cache speed: 0.358639
Iter 6/10: ladvise speed: 0.324915
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.307683
Iter 7/10: OSS cache speed: 0.339046
Iter 7/10: ladvise speed: 0.37362
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.330734
Iter 8/10: OSS cache speed: 0.356906
Iter 8/10: ladvise speed: 0.345589
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.312948
Iter 9/10: OSS cache speed: 0.350532
Iter 9/10: ladvise speed: 0.345532
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.297915
Iter 10/10: OSS cache speed: 0.32467
Iter 10/10: ladvise speed: 0.328183
Average uncached read: .30
Average speedup with OSS cached read:  .34 = +13%
Average speedup with ladvise willread:  .33 = +10%
Speedup with OSS cached read less than 20%,  got 13%. Skipping ladvise willread check.
fail_loc=0