== sanity test 255a: check 'lfs ladvise -a willread' ===== 18:13:20 (1775168000)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.20696 s, 20.1 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-ffff9c64862a7000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.00936
Iter 1/10: OSS cache speed: 1.10771
Iter 1/10: ladvise speed: 0.891338
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.06838
Iter 2/10: OSS cache speed: 1.09467
Iter 2/10: ladvise speed: 1.33996
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.38172
Iter 3/10: OSS cache speed: 1.56731
Iter 3/10: ladvise speed: 1.62341
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.34298
Iter 4/10: OSS cache speed: 1.26705
Iter 4/10: ladvise speed: 1.61984
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.81637
Iter 5/10: OSS cache speed: 1.99998
Iter 5/10: ladvise speed: 1.96143
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.98507
Iter 6/10: OSS cache speed: 2.10084
Iter 6/10: ladvise speed: 2.29169
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.24488
Iter 7/10: OSS cache speed: 2.23562
Iter 7/10: ladvise speed: 2.03106
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.09119
Iter 8/10: OSS cache speed: 2.00474
Iter 8/10: ladvise speed: 2.06638
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.07678
Iter 9/10: OSS cache speed: 2.15616
Iter 9/10: ladvise speed: 2.17332
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.05814
Iter 10/10: OSS cache speed: 2.05664
Iter 10/10: ladvise speed: 2.03186
Average uncached read: 1.80
Average speedup with OSS cached read:  1.75 = +-2%
Average speedup with ladvise willread:  1.80 = +0%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0