== sanity test 255a: check 'lfs ladvise -a willread' ===== 21:51:44 (1788918704)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 15.678 s, 6.7 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-ffff948b92b4f800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.427226
Iter 1/10: OSS cache speed: 0.351127
Iter 1/10: ladvise speed: 0.320381
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.31981
Iter 2/10: OSS cache speed: 0.372939
Iter 2/10: ladvise speed: 0.46379
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.447021
Iter 3/10: OSS cache speed: 0.536812
Iter 3/10: ladvise speed: 0.731456
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.657025
Iter 4/10: OSS cache speed: 0.73219
Iter 4/10: ladvise speed: 0.853941
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.761511
Iter 5/10: OSS cache speed: 1.0062
Iter 5/10: ladvise speed: 1.11315
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.909054
Iter 6/10: OSS cache speed: 1.14162
Iter 6/10: ladvise speed: 0.777085
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.334512
Iter 7/10: OSS cache speed: 0.548826
Iter 7/10: ladvise speed: 0.594976
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.524375
Iter 8/10: OSS cache speed: 0.266706
Iter 8/10: ladvise speed: 0.397265
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.431856
Iter 9/10: OSS cache speed: 0.427568
Iter 9/10: ladvise speed: 0.449135
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.398246
Iter 10/10: OSS cache speed: 0.46947
Iter 10/10: ladvise speed: 0.386943
Average uncached read: .52
Average speedup with OSS cached read:  .58 = +11%
Average speedup with ladvise willread:  .60 = +15%
Speedup with OSS cached read less than 20%,  got 11%. Skipping ladvise willread check.
fail_loc=0