== sanity test 255a: check 'lfs ladvise -a willread' ===== 02:29:18 (1769758158)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 9.50244 s, 11.0 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-ffff9991c3345800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.431427
Iter 1/10: OSS cache speed: 0.512647
Iter 1/10: ladvise speed: 0.512096
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.496882
Iter 2/10: OSS cache speed: 0.556711
Iter 2/10: ladvise speed: 0.573691
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.496488
Iter 3/10: OSS cache speed: 0.549226
Iter 3/10: ladvise speed: 0.637667
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.576424
Iter 4/10: OSS cache speed: 0.661493
Iter 4/10: ladvise speed: 0.695653
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.551202
Iter 5/10: OSS cache speed: 0.641927
Iter 5/10: ladvise speed: 0.601968
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.659281
Iter 6/10: OSS cache speed: 0.727649
Iter 6/10: ladvise speed: 1.0317
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.22755
Iter 7/10: OSS cache speed: 1.17537
Iter 7/10: ladvise speed: 1.09605
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.875399
Iter 8/10: OSS cache speed: 1.1128
Iter 8/10: ladvise speed: 1.12114
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.18194
Iter 9/10: OSS cache speed: 1.43137
Iter 9/10: ladvise speed: 1.38754
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.43773
Iter 10/10: OSS cache speed: 1.79772
Iter 10/10: ladvise speed: 1.96687
Average uncached read: .79
Average speedup with OSS cached read:  .91 = +15%
Average speedup with ladvise willread:  .96 = +21%
Speedup with OSS cached read less than 20%,  got 15%. Skipping ladvise willread check.
fail_loc=0