== sanity test 255a: check 'lfs ladvise -a willread' ===== 21:24:43 (1787102683)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.70404 s, 15.6 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-ffff9a66512e6000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.829694
Iter 1/10: OSS cache speed: 1.72345
Iter 1/10: ladvise speed: 1.90542
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.8349
Iter 2/10: OSS cache speed: 2.10718
Iter 2/10: ladvise speed: 2.05213
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.95109
Iter 3/10: OSS cache speed: 2.16686
Iter 3/10: ladvise speed: 2.22464
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.18252
Iter 4/10: OSS cache speed: 2.34636
Iter 4/10: ladvise speed: 2.26698
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.14091
Iter 5/10: OSS cache speed: 2.39818
Iter 5/10: ladvise speed: 2.33009
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.09122
Iter 6/10: OSS cache speed: 2.35592
Iter 6/10: ladvise speed: 2.25626
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.10001
Iter 7/10: OSS cache speed: 0.743829
Iter 7/10: ladvise speed: 0.735181
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.624972
Iter 8/10: OSS cache speed: 0.808477
Iter 8/10: ladvise speed: 0.788566
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.674652
Iter 9/10: OSS cache speed: 0.725647
Iter 9/10: ladvise speed: 0.665987
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.584307
Iter 10/10: OSS cache speed: 0.68467
Iter 10/10: ladvise speed: 0.697451
Average uncached read: 1.50
Average speedup with OSS cached read:  1.60 = +6%
Average speedup with ladvise willread:  1.59 = +6%
Speedup with OSS cached read less than 20%,  got 6%. Skipping ladvise willread check.
fail_loc=0