== sanity test 255a: check 'lfs ladvise -a willread' ===== 10:10:59 (1787753459)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 15.347 s, 6.8 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-ffff8db34576c000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.346321
Iter 1/10: OSS cache speed: 0.354499
Iter 1/10: ladvise speed: 0.374012
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.322046
Iter 2/10: OSS cache speed: 0.336886
Iter 2/10: ladvise speed: 0.367665
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.366305
Iter 3/10: OSS cache speed: 0.309075
Iter 3/10: ladvise speed: 0.333993
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.268904
Iter 4/10: OSS cache speed: 0.364382
Iter 4/10: ladvise speed: 0.328326
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.326512
Iter 5/10: OSS cache speed: 0.397367
Iter 5/10: ladvise speed: 0.330923
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.325371
Iter 6/10: OSS cache speed: 0.320904
Iter 6/10: ladvise speed: 0.389578
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.268983
Iter 7/10: OSS cache speed: 0.280506
Iter 7/10: ladvise speed: 0.321372
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.320527
Iter 8/10: OSS cache speed: 0.349609
Iter 8/10: ladvise speed: 0.375439
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.281266
Iter 9/10: OSS cache speed: 0.320539
Iter 9/10: ladvise speed: 0.32601
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.281493
Iter 10/10: OSS cache speed: 0.353185
Iter 10/10: ladvise speed: 0.374877
Average uncached read: .31
Average speedup with OSS cached read:  .33 = +6%
Average speedup with ladvise willread:  .35 = +12%
Speedup with OSS cached read less than 20%,  got 6%. Skipping ladvise willread check.
fail_loc=0