== sanity test 255a: check 'lfs ladvise -a willread' ===== 19:34:44 (1746142484)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 3.94509 s, 26.6 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-ffff8800b5822800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.931578
Iter 1/10: OSS cache speed: 0.865183
Iter 1/10: ladvise speed: 0.995849
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.808293
Iter 2/10: OSS cache speed: 0.747083
Iter 2/10: ladvise speed: 0.850362
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.814561
Iter 3/10: OSS cache speed: 0.891419
Iter 3/10: ladvise speed: 0.700778
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.830072
Iter 4/10: OSS cache speed: 0.764363
Iter 4/10: ladvise speed: 0.81306
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.808163
Iter 5/10: OSS cache speed: 0.76526
Iter 5/10: ladvise speed: 0.787752
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.808949
Iter 6/10: OSS cache speed: 0.914037
Iter 6/10: ladvise speed: 0.934218
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.09499
Iter 7/10: OSS cache speed: 0.792705
Iter 7/10: ladvise speed: 0.855471
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.926243
Iter 8/10: OSS cache speed: 1.2407
Iter 8/10: ladvise speed: 0.807264
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.809562
Iter 9/10: OSS cache speed: 0.806193
Iter 9/10: ladvise speed: 0.817719
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.836861
Iter 10/10: OSS cache speed: 0.857394
Iter 10/10: ladvise speed: 0.918168
Average uncached read: .86
Average speedup with OSS cached read:  .86 = +0%
Average speedup with ladvise willread:  .84 = +-2%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0