== sanity test 255a: check 'lfs ladvise -a willread' ===== 19:05:59 (1753743959)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 9.13337 s, 11.5 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-ffff99dac7f60000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.478902
Iter 1/10: OSS cache speed: 0.57328
Iter 1/10: ladvise speed: 0.607703
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.43769
Iter 2/10: OSS cache speed: 0.505705
Iter 2/10: ladvise speed: 0.544889
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.502836
Iter 3/10: OSS cache speed: 0.420943
Iter 3/10: ladvise speed: 0.576248
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.48788
Iter 4/10: OSS cache speed: 0.537253
Iter 4/10: ladvise speed: 0.605395
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.479792
Iter 5/10: OSS cache speed: 0.543157
Iter 5/10: ladvise speed: 0.618657
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.544399
Iter 6/10: OSS cache speed: 0.592285
Iter 6/10: ladvise speed: 0.539313
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.409099
Iter 7/10: OSS cache speed: 0.450865
Iter 7/10: ladvise speed: 0.502199
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.465837
Iter 8/10: OSS cache speed: 0.371841
Iter 8/10: ladvise speed: 0.384045
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.433501
Iter 9/10: OSS cache speed: 0.486563
Iter 9/10: ladvise speed: 0.558845
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.529929
Iter 10/10: OSS cache speed: 0.674301
Iter 10/10: ladvise speed: 0.667526
Average uncached read: .47
Average speedup with OSS cached read:  .51 = +8%
Average speedup with ladvise willread:  .56 = +19%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0