== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:25:15 (1783563915)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.6133 s, 9.0 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-ffff9ae650e4d800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.658625
Iter 1/10: OSS cache speed: 0.746528
Iter 1/10: ladvise speed: 0.927598
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.817557
Iter 2/10: OSS cache speed: 0.810523
Iter 2/10: ladvise speed: 0.900729
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.947187
Iter 3/10: OSS cache speed: 1.02452
Iter 3/10: ladvise speed: 0.891334
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.01631
Iter 4/10: OSS cache speed: 1.37373
Iter 4/10: ladvise speed: 1.45332
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.37326
Iter 5/10: OSS cache speed: 1.67884
Iter 5/10: ladvise speed: 1.66137
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.29269
Iter 6/10: OSS cache speed: 1.77914
Iter 6/10: ladvise speed: 2.06503
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.95634
Iter 7/10: OSS cache speed: 2.21989
Iter 7/10: ladvise speed: 2.50434
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.15565
Iter 8/10: OSS cache speed: 2.4265
Iter 8/10: ladvise speed: 2.30141
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.20952
Iter 9/10: OSS cache speed: 2.43819
Iter 9/10: ladvise speed: 2.31048
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.95148
Iter 10/10: OSS cache speed: 2.37214
Iter 10/10: ladvise speed: 2.056
Average uncached read: 1.43
Average speedup with OSS cached read:  1.68 = +17%
Average speedup with ladvise willread:  1.70 = +18%
Speedup with OSS cached read less than 20%,  got 17%. Skipping ladvise willread check.
fail_loc=0