== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:53:53 (1781664833)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.01033 s, 17.4 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-ffff88f5a0721800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.23735
Iter 1/10: OSS cache speed: 2.17519
Iter 1/10: ladvise speed: 2.31059
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.22389
Iter 2/10: OSS cache speed: 2.38915
Iter 2/10: ladvise speed: 2.04463
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.05292
Iter 3/10: OSS cache speed: 2.19619
Iter 3/10: ladvise speed: 2.32628
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.11195
Iter 4/10: OSS cache speed: 2.4174
Iter 4/10: ladvise speed: 2.27037
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.34994
Iter 5/10: OSS cache speed: 2.52688
Iter 5/10: ladvise speed: 2.48821
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.31797
Iter 6/10: OSS cache speed: 2.53943
Iter 6/10: ladvise speed: 2.42122
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.26848
Iter 7/10: OSS cache speed: 2.25172
Iter 7/10: ladvise speed: 0.206032
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.195809
Iter 8/10: OSS cache speed: 0.356944
Iter 8/10: ladvise speed: 0.389393
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.335835
Iter 9/10: OSS cache speed: 0.280459
Iter 9/10: ladvise speed: 0.344666
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.487386
Iter 10/10: OSS cache speed: 0.674176
Iter 10/10: ladvise speed: 0.679971
Average uncached read: 1.65
Average speedup with OSS cached read:  1.78 = +7%
Average speedup with ladvise willread:  1.54 = +-6%
Speedup with OSS cached read less than 20%,  got 7%. Skipping ladvise willread check.
fail_loc=0