== sanity test 255a: check 'lfs ladvise -a willread' ===== 14:50:50 (1773687050)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.07234 s, 17.3 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-ffff9744891b2800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.40618
Iter 1/10: OSS cache speed: 1.10164
Iter 1/10: ladvise speed: 1.37774
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.38394
Iter 2/10: OSS cache speed: 1.35192
Iter 2/10: ladvise speed: 1.08101
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.14242
Iter 3/10: OSS cache speed: 1.18885
Iter 3/10: ladvise speed: 1.52559
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.7653
Iter 4/10: OSS cache speed: 1.79547
Iter 4/10: ladvise speed: 1.79885
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.62914
Iter 5/10: OSS cache speed: 1.47398
Iter 5/10: ladvise speed: 1.26591
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.35078
Iter 6/10: OSS cache speed: 1.81026
Iter 6/10: ladvise speed: 1.57107
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.91715
Iter 7/10: OSS cache speed: 1.89446
Iter 7/10: ladvise speed: 1.84712
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.89952
Iter 8/10: OSS cache speed: 1.93065
Iter 8/10: ladvise speed: 1.80015
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.70694
Iter 9/10: OSS cache speed: 1.90938
Iter 9/10: ladvise speed: 1.74323
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.93335
Iter 10/10: OSS cache speed: 1.93252
Iter 10/10: ladvise speed: 1.90536
Average uncached read: 1.61
Average speedup with OSS cached read:  1.63 = +1%
Average speedup with ladvise willread:  1.59 = +-1%
Speedup with OSS cached read less than 20%,  got 1%. Skipping ladvise willread check.
fail_loc=0