== sanity test 255a: check 'lfs ladvise -a willread' ===== 21:00:47 (1777424447)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.09654 s, 20.6 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-ffff9a9e46275800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.00246
Iter 1/10: OSS cache speed: 1.9721
Iter 1/10: ladvise speed: 1.85183
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.21505
Iter 2/10: OSS cache speed: 2.09274
Iter 2/10: ladvise speed: 2.12533
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.03293
Iter 3/10: OSS cache speed: 2.13002
Iter 3/10: ladvise speed: 2.08456
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.05615
Iter 4/10: OSS cache speed: 1.97701
Iter 4/10: ladvise speed: 2.1084
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.10365
Iter 5/10: OSS cache speed: 2.27806
Iter 5/10: ladvise speed: 2.16551
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.09045
Iter 6/10: OSS cache speed: 2.13187
Iter 6/10: ladvise speed: 2.02803
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.10781
Iter 7/10: OSS cache speed: 2.07276
Iter 7/10: ladvise speed: 2.09686
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.15563
Iter 8/10: OSS cache speed: 2.16417
Iter 8/10: ladvise speed: 2.04296
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.08705
Iter 9/10: OSS cache speed: 2.11479
Iter 9/10: ladvise speed: 2.14481
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.16587
Iter 10/10: OSS cache speed: 2.10814
Iter 10/10: ladvise speed: 2.13279
Average uncached read: 2.10
Average speedup with OSS cached read:  2.10 = +0%
Average speedup with ladvise willread:  2.07 = +-1%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0