== sanity test 255a: check 'lfs ladvise -a willread' ===== 19:03:44 (1786748624)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.1905 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-ffff9ff343eca000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.440503
Iter 1/10: OSS cache speed: 0.433533
Iter 1/10: ladvise speed: 0.435331
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.412588
Iter 2/10: OSS cache speed: 0.52997
Iter 2/10: ladvise speed: 0.488692
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.408771
Iter 3/10: OSS cache speed: 0.475493
Iter 3/10: ladvise speed: 0.440311
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.378827
Iter 4/10: OSS cache speed: 0.499723
Iter 4/10: ladvise speed: 0.526932
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.43291
Iter 5/10: OSS cache speed: 0.494429
Iter 5/10: ladvise speed: 0.409141
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.400306
Iter 6/10: OSS cache speed: 0.393123
Iter 6/10: ladvise speed: 0.439129
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.387078
Iter 7/10: OSS cache speed: 0.406453
Iter 7/10: ladvise speed: 0.414256
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.443572
Iter 8/10: OSS cache speed: 0.41349
Iter 8/10: ladvise speed: 0.401212
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.512753
Iter 9/10: OSS cache speed: 0.458298
Iter 9/10: ladvise speed: 0.492061
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.363921
Iter 10/10: OSS cache speed: 0.413885
Iter 10/10: ladvise speed: 0.364111
Average uncached read: .41
Average speedup with OSS cached read:  .45 = +9%
Average speedup with ladvise willread:  .44 = +7%
Speedup with OSS cached read less than 20%,  got 9%. Skipping ladvise willread check.
fail_loc=0