== sanity test 255a: check 'lfs ladvise -a willread' ===== 18:40:59 (1784414459)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.89924 s, 17.8 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-ffff8e8285dd2000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.24652
Iter 1/10: OSS cache speed: 2.48123
Iter 1/10: ladvise speed: 2.37498
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.18308
Iter 2/10: OSS cache speed: 2.38264
Iter 2/10: ladvise speed: 2.42933
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.19514
Iter 3/10: OSS cache speed: 2.40021
Iter 3/10: ladvise speed: 2.40134
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.16407
Iter 4/10: OSS cache speed: 2.49851
Iter 4/10: ladvise speed: 2.38505
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.31774
Iter 5/10: OSS cache speed: 2.43701
Iter 5/10: ladvise speed: 2.49945
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.39812
Iter 6/10: OSS cache speed: 2.49478
Iter 6/10: ladvise speed: 2.50041
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.35282
Iter 7/10: OSS cache speed: 2.50339
Iter 7/10: ladvise speed: 1.75451
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.42225
Iter 8/10: OSS cache speed: 2.21364
Iter 8/10: ladvise speed: 2.36359
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.20278
Iter 9/10: OSS cache speed: 2.5839
Iter 9/10: ladvise speed: 2.43838
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.33274
Iter 10/10: OSS cache speed: 2.45958
Iter 10/10: ladvise speed: 1.9317
Average uncached read: 2.18
Average speedup with OSS cached read:  2.44 = +11%
Average speedup with ladvise willread:  2.30 = +5%
Speedup with OSS cached read less than 20%,  got 11%. Skipping ladvise willread check.
fail_loc=0