== sanity test 255a: check 'lfs ladvise -a willread' ===== 02:12:29 (1788588749)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.2142 s, 7.4 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-ffff9bcfd4b4b000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.320471
Iter 1/10: OSS cache speed: 0.323945
Iter 1/10: ladvise speed: 0.36268
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.320132
Iter 2/10: OSS cache speed: 0.410027
Iter 2/10: ladvise speed: 0.40553
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.332921
Iter 3/10: OSS cache speed: 0.361748
Iter 3/10: ladvise speed: 0.398085
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.345629
Iter 4/10: OSS cache speed: 0.410567
Iter 4/10: ladvise speed: 0.36835
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.369737
Iter 5/10: OSS cache speed: 0.369911
Iter 5/10: ladvise speed: 0.375026
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.325242
Iter 6/10: OSS cache speed: 0.39508
Iter 6/10: ladvise speed: 0.315091
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.297291
Iter 7/10: OSS cache speed: 0.353356
Iter 7/10: ladvise speed: 0.372413
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.381088
Iter 8/10: OSS cache speed: 0.38969
Iter 8/10: ladvise speed: 0.415853
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.354449
Iter 9/10: OSS cache speed: 0.375195
Iter 9/10: ladvise speed: 0.384768
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.341509
Iter 10/10: OSS cache speed: 0.410696
Iter 10/10: ladvise speed: 0.413956
Average uncached read: .33
Average speedup with OSS cached read:  .38 = +15%
Average speedup with ladvise willread:  .38 = +15%
Speedup with OSS cached read less than 20%,  got 15%. Skipping ladvise willread check.
fail_loc=0