== sanity test 255a: check 'lfs ladvise -a willread' ===== 05:14:24 (1789118064)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.193 s, 10.3 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-ffff981d078f8800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.403428
Iter 1/10: OSS cache speed: 0.457092
Iter 1/10: ladvise speed: 0.411606
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.371437
Iter 2/10: OSS cache speed: 0.472412
Iter 2/10: ladvise speed: 0.429943
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.3745
Iter 3/10: OSS cache speed: 0.462551
Iter 3/10: ladvise speed: 0.4864
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.375295
Iter 4/10: OSS cache speed: 0.464994
Iter 4/10: ladvise speed: 0.506735
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.438636
Iter 5/10: OSS cache speed: 0.483562
Iter 5/10: ladvise speed: 0.513958
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.446672
Iter 6/10: OSS cache speed: 0.443008
Iter 6/10: ladvise speed: 0.488642
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.434365
Iter 7/10: OSS cache speed: 0.461906
Iter 7/10: ladvise speed: 0.437323
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.363628
Iter 8/10: OSS cache speed: 0.458643
Iter 8/10: ladvise speed: 0.464347
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.440448
Iter 9/10: OSS cache speed: 0.429407
Iter 9/10: ladvise speed: 0.481085
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.397036
Iter 10/10: OSS cache speed: 0.491229
Iter 10/10: ladvise speed: 0.474275
Average uncached read: .40
Average speedup with OSS cached read:  .46 = +15%
Average speedup with ladvise willread:  .46 = +15%
Speedup with OSS cached read less than 20%,  got 15%. Skipping ladvise willread check.
fail_loc=0