== sanity test 255a: check 'lfs ladvise -a willread' ===== 20:57:18 (1787101038)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 8.24794 s, 12.7 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-ffff946ec52d5800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.490462
Iter 1/10: OSS cache speed: 0.609764
Iter 1/10: ladvise speed: 0.706259
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.718617
Iter 2/10: OSS cache speed: 1.05243
Iter 2/10: ladvise speed: 0.991238
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.846164
Iter 3/10: OSS cache speed: 0.875576
Iter 3/10: ladvise speed: 1.03038
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.34539
Iter 4/10: OSS cache speed: 1.06364
Iter 4/10: ladvise speed: 0.974806
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.07888
Iter 5/10: OSS cache speed: 1.07823
Iter 5/10: ladvise speed: 1.31924
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.45348
Iter 6/10: OSS cache speed: 1.38214
Iter 6/10: ladvise speed: 1.22226
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.04942
Iter 7/10: OSS cache speed: 1.2397
Iter 7/10: ladvise speed: 1.26097
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.933901
Iter 8/10: OSS cache speed: 0.541564
Iter 8/10: ladvise speed: 0.594453
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.609079
Iter 9/10: OSS cache speed: 1.06124
Iter 9/10: ladvise speed: 1.82848
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.6464
Iter 10/10: OSS cache speed: 1.46453
Iter 10/10: ladvise speed: 1.71411
Average uncached read: 1.01
Average speedup with OSS cached read:  1.03 = +1%
Average speedup with ladvise willread:  1.16 = +14%
Speedup with OSS cached read less than 20%,  got 1%. Skipping ladvise willread check.
fail_loc=0