== sanity test 255a: check 'lfs ladvise -a willread' ===== 01:47:04 (1769755624)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.2139 s, 8.6 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-ffff8a16e0b6b000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.41788
Iter 1/10: OSS cache speed: 0.457458
Iter 1/10: ladvise speed: 0.347635
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.416926
Iter 2/10: OSS cache speed: 0.423415
Iter 2/10: ladvise speed: 0.372398
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.378874
Iter 3/10: OSS cache speed: 0.431042
Iter 3/10: ladvise speed: 0.343338
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.354143
Iter 4/10: OSS cache speed: 0.352483
Iter 4/10: ladvise speed: 0.387895
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.354649
Iter 5/10: OSS cache speed: 0.374013
Iter 5/10: ladvise speed: 0.402641
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.303172
Iter 6/10: OSS cache speed: 0.41005
Iter 6/10: ladvise speed: 0.382851
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.375539
Iter 7/10: OSS cache speed: 0.37466
Iter 7/10: ladvise speed: 0.423439
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.4752
Iter 8/10: OSS cache speed: 0.4832
Iter 8/10: ladvise speed: 0.44122
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.310642
Iter 9/10: OSS cache speed: 0.379165
Iter 9/10: ladvise speed: 0.394856
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.447942
Iter 10/10: OSS cache speed: 0.452259
Iter 10/10: ladvise speed: 0.452253
Average uncached read: .38
Average speedup with OSS cached read:  .41 = +7%
Average speedup with ladvise willread:  .39 = +2%
Speedup with OSS cached read less than 20%,  got 7%. Skipping ladvise willread check.
fail_loc=0