== sanity test 255a: check 'lfs ladvise -a willread' ===== 15:12:18 (1775848338)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.98066 s, 15.0 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-ffff91ed11968000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.247202
Iter 1/10: OSS cache speed: 0.403055
Iter 1/10: ladvise speed: 0.338305
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.390973
Iter 2/10: OSS cache speed: 0.334793
Iter 2/10: ladvise speed: 0.395524
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.329579
Iter 3/10: OSS cache speed: 0.439196
Iter 3/10: ladvise speed: 0.38253
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.391426
Iter 4/10: OSS cache speed: 0.375445
Iter 4/10: ladvise speed: 0.428827
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.32687
Iter 5/10: OSS cache speed: 0.419226
Iter 5/10: ladvise speed: 0.420033
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.405992
Iter 6/10: OSS cache speed: 0.403639
Iter 6/10: ladvise speed: 0.43769
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.381402
Iter 7/10: OSS cache speed: 0.416639
Iter 7/10: ladvise speed: 0.42056
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.42072
Iter 8/10: OSS cache speed: 0.440034
Iter 8/10: ladvise speed: 0.465502
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.414381
Iter 9/10: OSS cache speed: 0.438814
Iter 9/10: ladvise speed: 0.448427
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.452937
Iter 10/10: OSS cache speed: 0.387148
Iter 10/10: ladvise speed: 0.412398
Average uncached read: .37
Average speedup with OSS cached read:  .40 = +8%
Average speedup with ladvise willread:  .41 = +10%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0