== sanity test 255a: check 'lfs ladvise -a willread' ===== 23:33:21 (1790393601)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 7.81199 s, 13.4 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-ffff8edf4fc20000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.666419
Iter 1/10: OSS cache speed: 0.643752
Iter 1/10: ladvise speed: 0.570519
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.622703
Iter 2/10: OSS cache speed: 0.662393
Iter 2/10: ladvise speed: 0.703399
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.891802
Iter 3/10: OSS cache speed: 1.29576
Iter 3/10: ladvise speed: 1.39078
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.30831
Iter 4/10: OSS cache speed: 1.53759
Iter 4/10: ladvise speed: 1.5329
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.97129
Iter 5/10: OSS cache speed: 2.15318
Iter 5/10: ladvise speed: 1.9128
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.94237
Iter 6/10: OSS cache speed: 1.90548
Iter 6/10: ladvise speed: 2.11305
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.1723
Iter 7/10: OSS cache speed: 1.9879
Iter 7/10: ladvise speed: 2.23337
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.24707
Iter 8/10: OSS cache speed: 2.05666
Iter 8/10: ladvise speed: 2.31425
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.36675
Iter 9/10: OSS cache speed: 2.35642
Iter 9/10: ladvise speed: 2.22633
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.13642
Iter 10/10: OSS cache speed: 2.30292
Iter 10/10: ladvise speed: 2.48159
Average uncached read: 1.63
Average speedup with OSS cached read:  1.69 = +3%
Average speedup with ladvise willread:  1.74 = +6%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0