== sanity test 255a: check 'lfs ladvise -a willread' ===== 21:59:24 (1767322764)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.69799 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-ffff9e9bc65be800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.44674
Iter 1/10: OSS cache speed: 0.508942
Iter 1/10: ladvise speed: 0.531848
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.58336
Iter 2/10: OSS cache speed: 0.5876
Iter 2/10: ladvise speed: 0.53729
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.598838
Iter 3/10: OSS cache speed: 0.587131
Iter 3/10: ladvise speed: 0.579854
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.615122
Iter 4/10: OSS cache speed: 0.58565
Iter 4/10: ladvise speed: 0.57149
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.687068
Iter 5/10: OSS cache speed: 0.681325
Iter 5/10: ladvise speed: 0.65534
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.647979
Iter 6/10: OSS cache speed: 0.610451
Iter 6/10: ladvise speed: 0.653227
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.611955
Iter 7/10: OSS cache speed: 0.658439
Iter 7/10: ladvise speed: 0.675665
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.665322
Iter 8/10: OSS cache speed: 0.600261
Iter 8/10: ladvise speed: 0.641581
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.64848
Iter 9/10: OSS cache speed: 0.694259
Iter 9/10: ladvise speed: 0.703683
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.634955
Iter 10/10: OSS cache speed: 0.815163
Iter 10/10: ladvise speed: 0.645216
Average uncached read: .61
Average speedup with OSS cached read:  .63 = +3%
Average speedup with ladvise willread:  .61 = +0%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0