== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:31:15 (1772422275)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.19819 s, 16.9 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-ffff9858580c0800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.36731
Iter 1/10: OSS cache speed: 0.62902
Iter 1/10: ladvise speed: 0.733449
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.655809
Iter 2/10: OSS cache speed: 0.992213
Iter 2/10: ladvise speed: 1.14857
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.11218
Iter 3/10: OSS cache speed: 1.51446
Iter 3/10: ladvise speed: 1.78593
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.9828
Iter 4/10: OSS cache speed: 2.17833
Iter 4/10: ladvise speed: 2.18216
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.11029
Iter 5/10: OSS cache speed: 2.38025
Iter 5/10: ladvise speed: 2.12444
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.06193
Iter 6/10: OSS cache speed: 2.20385
Iter 6/10: ladvise speed: 2.33287
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.98545
Iter 7/10: OSS cache speed: 2.21295
Iter 7/10: ladvise speed: 2.30734
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.14607
Iter 8/10: OSS cache speed: 2.34385
Iter 8/10: ladvise speed: 2.13796
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.01663
Iter 9/10: OSS cache speed: 2.18905
Iter 9/10: ladvise speed: 2.19749
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.99175
Iter 10/10: OSS cache speed: 2.2358
Iter 10/10: ladvise speed: 2.17288
Average uncached read: 1.74
Average speedup with OSS cached read:  1.88 = +8%
Average speedup with ladvise willread:  1.91 = +9%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0