== sanity test 255a: check 'lfs ladvise -a willread' ===== 10:08:53 (1787062133)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.66441 s, 18.5 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-ffff93e083ec5000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.27431
Iter 1/10: OSS cache speed: 2.5382
Iter 1/10: ladvise speed: 2.42726
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.12711
Iter 2/10: OSS cache speed: 2.37949
Iter 2/10: ladvise speed: 2.38976
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.01126
Iter 3/10: OSS cache speed: 2.40678
Iter 3/10: ladvise speed: 2.37858
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.78936
Iter 4/10: OSS cache speed: 2.2231
Iter 4/10: ladvise speed: 2.37461
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.03206
Iter 5/10: OSS cache speed: 1.86883
Iter 5/10: ladvise speed: 2.29096
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.33436
Iter 6/10: OSS cache speed: 2.42648
Iter 6/10: ladvise speed: 2.10055
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.04535
Iter 7/10: OSS cache speed: 1.97217
Iter 7/10: ladvise speed: 2.04082
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.4856
Iter 8/10: OSS cache speed: 1.95052
Iter 8/10: ladvise speed: 1.35539
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.20141
Iter 9/10: OSS cache speed: 1.27186
Iter 9/10: ladvise speed: 1.21644
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.10743
Iter 10/10: OSS cache speed: 1.33146
Iter 10/10: ladvise speed: 1.25742
Average uncached read: 1.84
Average speedup with OSS cached read:  2.03 = +10%
Average speedup with ladvise willread:  1.98 = +7%
Speedup with OSS cached read less than 20%,  got 10%. Skipping ladvise willread check.
fail_loc=0