== sanity test 255a: check 'lfs ladvise -a willread' ===== 00:34:06 (1788669246)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.9967 s, 8.7 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-ffff8ce7c5e46000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.368273
Iter 1/10: OSS cache speed: 0.322328
Iter 1/10: ladvise speed: 0.429024
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.364174
Iter 2/10: OSS cache speed: 0.390602
Iter 2/10: ladvise speed: 0.339023
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.354347
Iter 3/10: OSS cache speed: 0.317668
Iter 3/10: ladvise speed: 0.392107
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.382492
Iter 4/10: OSS cache speed: 0.318674
Iter 4/10: ladvise speed: 0.320109
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.364765
Iter 5/10: OSS cache speed: 0.324535
Iter 5/10: ladvise speed: 0.335644
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.32431
Iter 6/10: OSS cache speed: 0.386794
Iter 6/10: ladvise speed: 0.392024
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.337623
Iter 7/10: OSS cache speed: 0.398223
Iter 7/10: ladvise speed: 0.367408
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.343133
Iter 8/10: OSS cache speed: 0.301969
Iter 8/10: ladvise speed: 0.378456
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.443092
Iter 9/10: OSS cache speed: 0.396923
Iter 9/10: ladvise speed: 0.410536
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.375896
Iter 10/10: OSS cache speed: 0.378307
Iter 10/10: ladvise speed: 0.428417
Average uncached read: .36
Average speedup with OSS cached read:  .35 = +-2%
Average speedup with ladvise willread:  .37 = +2%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0