== sanity test 255a: check 'lfs ladvise -a willread' ===== 02:42:45 (1787380965)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.1864 s, 8.0 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-ffff8edb04ee2000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.424746
Iter 1/10: OSS cache speed: 0.417521
Iter 1/10: ladvise speed: 0.503339
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.485657
Iter 2/10: OSS cache speed: 0.502634
Iter 2/10: ladvise speed: 0.48116
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.384499
Iter 3/10: OSS cache speed: 0.495839
Iter 3/10: ladvise speed: 0.537903
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.435335
Iter 4/10: OSS cache speed: 0.451668
Iter 4/10: ladvise speed: 0.526243
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.426098
Iter 5/10: OSS cache speed: 0.473844
Iter 5/10: ladvise speed: 0.465586
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.424924
Iter 6/10: OSS cache speed: 0.426106
Iter 6/10: ladvise speed: 0.462193
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.418774
Iter 7/10: OSS cache speed: 0.500585
Iter 7/10: ladvise speed: 0.468911
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.415941
Iter 8/10: OSS cache speed: 0.450495
Iter 8/10: ladvise speed: 0.395543
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.420879
Iter 9/10: OSS cache speed: 0.425642
Iter 9/10: ladvise speed: 0.445118
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.402847
Iter 10/10: OSS cache speed: 0.479602
Iter 10/10: ladvise speed: 0.528225
Average uncached read: .42
Average speedup with OSS cached read:  .46 = +9%
Average speedup with ladvise willread:  .48 = +14%
Speedup with OSS cached read less than 20%,  got 9%. Skipping ladvise willread check.
fail_loc=0