== sanity test 255a: check 'lfs ladvise -a willread' ===== 13:10:32 (1772907032)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.37376 s, 19.5 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-ffff8ebd59181800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.02512
Iter 1/10: OSS cache speed: 1.17279
Iter 1/10: ladvise speed: 1.30647
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.0823
Iter 2/10: OSS cache speed: 1.36918
Iter 2/10: ladvise speed: 1.25937
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.29755
Iter 3/10: OSS cache speed: 1.45357
Iter 3/10: ladvise speed: 1.06393
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.95568
Iter 4/10: OSS cache speed: 1.1488
Iter 4/10: ladvise speed: 1.17874
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.03743
Iter 5/10: OSS cache speed: 1.06575
Iter 5/10: ladvise speed: 1.18242
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.03618
Iter 6/10: OSS cache speed: 1.11245
Iter 6/10: ladvise speed: 1.11766
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.02287
Iter 7/10: OSS cache speed: 1.0822
Iter 7/10: ladvise speed: 1.06888
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.966385
Iter 8/10: OSS cache speed: 1.07209
Iter 8/10: ladvise speed: 1.08923
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.968835
Iter 9/10: OSS cache speed: 1.04484
Iter 9/10: ladvise speed: 1.18366
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.933747
Iter 10/10: OSS cache speed: 1.05985
Iter 10/10: ladvise speed: 1.10192
Average uncached read: 1.03
Average speedup with OSS cached read:  1.15 = +11%
Average speedup with ladvise willread:  1.15 = +11%
Speedup with OSS cached read less than 20%,  got 11%. Skipping ladvise willread check.
fail_loc=0