== sanity test 255a: check 'lfs ladvise -a willread' ===== 02:16:04 (1779689764)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.7423 s, 9.8 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-ffff8ac3c60cc800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.543802
Iter 1/10: OSS cache speed: 0.570477
Iter 1/10: ladvise speed: 0.673158
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.619295
Iter 2/10: OSS cache speed: 0.692915
Iter 2/10: ladvise speed: 0.721952
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.655715
Iter 3/10: OSS cache speed: 0.676878
Iter 3/10: ladvise speed: 0.715454
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.644449
Iter 4/10: OSS cache speed: 0.68759
Iter 4/10: ladvise speed: 0.708951
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.686418
Iter 5/10: OSS cache speed: 0.713669
Iter 5/10: ladvise speed: 0.755757
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.689139
Iter 6/10: OSS cache speed: 0.76787
Iter 6/10: ladvise speed: 0.484261
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.391126
Iter 7/10: OSS cache speed: 0.515843
Iter 7/10: ladvise speed: 0.5664
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.513901
Iter 8/10: OSS cache speed: 0.489542
Iter 8/10: ladvise speed: 0.576358
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.666267
Iter 9/10: OSS cache speed: 0.74316
Iter 9/10: ladvise speed: 0.736024
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.669861
Iter 10/10: OSS cache speed: 0.727554
Iter 10/10: ladvise speed: 0.787491
Average uncached read: .60
Average speedup with OSS cached read:  .65 = +8%
Average speedup with ladvise willread:  .67 = +11%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0