== sanity test 255a: check 'lfs ladvise -a willread' ===== 04:24:00 (1789547040)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.02598 s, 17.4 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-ffff9db402d39800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.2308
Iter 1/10: OSS cache speed: 2.20898
Iter 1/10: ladvise speed: 2.18482
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.19359
Iter 2/10: OSS cache speed: 2.22124
Iter 2/10: ladvise speed: 2.15796
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.24293
Iter 3/10: OSS cache speed: 2.20462
Iter 3/10: ladvise speed: 2.23709
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.19439
Iter 4/10: OSS cache speed: 2.21329
Iter 4/10: ladvise speed: 0.529003
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.605343
Iter 5/10: OSS cache speed: 0.731055
Iter 5/10: ladvise speed: 0.705746
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.70467
Iter 6/10: OSS cache speed: 1.00509
Iter 6/10: ladvise speed: 0.233025
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.358307
Iter 7/10: OSS cache speed: 0.454755
Iter 7/10: ladvise speed: 0.454796
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.426741
Iter 8/10: OSS cache speed: 0.4314
Iter 8/10: ladvise speed: 0.544005
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.583316
Iter 9/10: OSS cache speed: 0.448342
Iter 9/10: ladvise speed: 0.431189
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.451928
Iter 10/10: OSS cache speed: 0.445338
Iter 10/10: ladvise speed: 0.449481
Average uncached read: 1.19
Average speedup with OSS cached read:  1.23 = +3%
Average speedup with ladvise willread:  .99 = +-16%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0