== sanity test 255a: check 'lfs ladvise -a willread' ===== 09:54:25 (1766415265)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 8.70644 s, 12.0 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-ffff92ed58dff000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.515734
Iter 1/10: OSS cache speed: 0.627242
Iter 1/10: ladvise speed: 0.659351
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.612768
Iter 2/10: OSS cache speed: 0.646355
Iter 2/10: ladvise speed: 0.640373
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.589276
Iter 3/10: OSS cache speed: 0.673167
Iter 3/10: ladvise speed: 0.601606
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.624818
Iter 4/10: OSS cache speed: 0.717145
Iter 4/10: ladvise speed: 0.822126
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.716188
Iter 5/10: OSS cache speed: 0.833954
Iter 5/10: ladvise speed: 0.746924
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.702359
Iter 6/10: OSS cache speed: 0.818432
Iter 6/10: ladvise speed: 0.920733
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.965821
Iter 7/10: OSS cache speed: 1.1716
Iter 7/10: ladvise speed: 1.19008
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.31671
Iter 8/10: OSS cache speed: 1.76216
Iter 8/10: ladvise speed: 1.84228
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.86302
Iter 9/10: OSS cache speed: 1.95439
Iter 9/10: ladvise speed: 2.14157
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.011
Iter 10/10: OSS cache speed: 2.1405
Iter 10/10: ladvise speed: 2.06431
Average uncached read: .99
Average speedup with OSS cached read:  1.13 = +14%
Average speedup with ladvise willread:  1.16 = +17%
Speedup with OSS cached read less than 20%,  got 14%. Skipping ladvise willread check.
fail_loc=0