== sanity test 255a: check 'lfs ladvise -a willread' ===== 07:13:51 (1786533231)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.59525 s, 15.9 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-ffff96ea085f5000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.01677
Iter 1/10: OSS cache speed: 1.12534
Iter 1/10: ladvise speed: 1.36537
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.942819
Iter 2/10: OSS cache speed: 1.08441
Iter 2/10: ladvise speed: 1.08104
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.65803
Iter 3/10: OSS cache speed: 1.93078
Iter 3/10: ladvise speed: 2.12457
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.69124
Iter 4/10: OSS cache speed: 2.00937
Iter 4/10: ladvise speed: 2.33639
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.22432
Iter 5/10: OSS cache speed: 2.28169
Iter 5/10: ladvise speed: 2.27277
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.771
Iter 6/10: OSS cache speed: 2.19436
Iter 6/10: ladvise speed: 2.36191
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.0824
Iter 7/10: OSS cache speed: 2.41256
Iter 7/10: ladvise speed: 2.465
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.32327
Iter 8/10: OSS cache speed: 2.49117
Iter 8/10: ladvise speed: 2.49089
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.21347
Iter 9/10: OSS cache speed: 2.40094
Iter 9/10: ladvise speed: 2.34953
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.2517
Iter 10/10: OSS cache speed: 2.32604
Iter 10/10: ladvise speed: 2.34736
Average uncached read: 1.81
Average speedup with OSS cached read:  2.02 = +11%
Average speedup with ladvise willread:  2.11 = +16%
Speedup with OSS cached read less than 20%,  got 11%. Skipping ladvise willread check.
fail_loc=0