== sanity test 255a: check 'lfs ladvise -a willread' ===== 15:26:55 (1746127615)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 6.66067 s, 15.7 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-ffff88013767b000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.632732
Iter 1/10: OSS cache speed: 0.778288
Iter 1/10: ladvise speed: 0.831968
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.780666
Iter 2/10: OSS cache speed: 0.861514
Iter 2/10: ladvise speed: 0.863309
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.727407
Iter 3/10: OSS cache speed: 0.734287
Iter 3/10: ladvise speed: 0.737289
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.610347
Iter 4/10: OSS cache speed: 0.671984
Iter 4/10: ladvise speed: 0.623863
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.53267
Iter 5/10: OSS cache speed: 0.565371
Iter 5/10: ladvise speed: 0.6131
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.518491
Iter 6/10: OSS cache speed: 0.628605
Iter 6/10: ladvise speed: 0.621583
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.546718
Iter 7/10: OSS cache speed: 0.558892
Iter 7/10: ladvise speed: 0.533192
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.553416
Iter 8/10: OSS cache speed: 0.639263
Iter 8/10: ladvise speed: 0.670251
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.613237
Iter 9/10: OSS cache speed: 0.664203
Iter 9/10: ladvise speed: 0.635406
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.562027
Iter 10/10: OSS cache speed: 0.593686
Iter 10/10: ladvise speed: 0.581633
Average uncached read: .60
Average speedup with OSS cached read:  .66 = +10%
Average speedup with ladvise willread:  .67 = +11%
Speedup with OSS cached read less than 20%,  got 10%. Skipping ladvise willread check.
fail_loc=0