== sanity test 255a: check 'lfs ladvise -a willread' ===== 19:58:48 (1781222328)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.3709 s, 7.3 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-ffff9168c7fa9800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.346845
Iter 1/10: OSS cache speed: 0.340391
Iter 1/10: ladvise speed: 0.386098
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.320371
Iter 2/10: OSS cache speed: 0.347765
Iter 2/10: ladvise speed: 0.359825
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.355078
Iter 3/10: OSS cache speed: 0.345923
Iter 3/10: ladvise speed: 0.38687
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.304684
Iter 4/10: OSS cache speed: 0.355161
Iter 4/10: ladvise speed: 0.391324
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.360938
Iter 5/10: OSS cache speed: 0.365398
Iter 5/10: ladvise speed: 0.301798
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.33136
Iter 6/10: OSS cache speed: 0.295049
Iter 6/10: ladvise speed: 0.3113
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.331609
Iter 7/10: OSS cache speed: 0.355842
Iter 7/10: ladvise speed: 0.330194
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.341831
Iter 8/10: OSS cache speed: 0.342672
Iter 8/10: ladvise speed: 0.408153
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.323081
Iter 9/10: OSS cache speed: 0.344716
Iter 9/10: ladvise speed: 0.349371
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.244993
Iter 10/10: OSS cache speed: 0.350723
Iter 10/10: ladvise speed: 0.423456
Average uncached read: .32
Average speedup with OSS cached read:  .34 = +6%
Average speedup with ladvise willread:  .36 = +12%
Speedup with OSS cached read less than 20%,  got 6%. Skipping ladvise willread check.
fail_loc=0