== sanity test 255a: check 'lfs ladvise -a willread' ===== 20:49:57 (1768009797)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.55594 s, 18.9 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-ffff903cc6027000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.76111
Iter 1/10: OSS cache speed: 2.08357
Iter 1/10: ladvise speed: 2.04974
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.34803
Iter 2/10: OSS cache speed: 2.28492
Iter 2/10: ladvise speed: 2.16548
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.17574
Iter 3/10: OSS cache speed: 2.04452
Iter 3/10: ladvise speed: 2.12002
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.14396
Iter 4/10: OSS cache speed: 2.18203
Iter 4/10: ladvise speed: 2.14808
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.16711
Iter 5/10: OSS cache speed: 2.15784
Iter 5/10: ladvise speed: 2.10967
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.07342
Iter 6/10: OSS cache speed: 2.18772
Iter 6/10: ladvise speed: 2.14535
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.15275
Iter 7/10: OSS cache speed: 2.20678
Iter 7/10: ladvise speed: 2.18407
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.24902
Iter 8/10: OSS cache speed: 2.18511
Iter 8/10: ladvise speed: 2.16745
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.15536
Iter 9/10: OSS cache speed: 2.2217
Iter 9/10: ladvise speed: 2.22524
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.18108
Iter 10/10: OSS cache speed: 2.18465
Iter 10/10: ladvise speed: 2.11197
Average uncached read: 2.14
Average speedup with OSS cached read:  2.17 = +1%
Average speedup with ladvise willread:  2.14 = +0%
Speedup with OSS cached read less than 20%,  got 1%. Skipping ladvise willread check.
fail_loc=0