== sanity test 255a: check 'lfs ladvise -a willread' ===== 10:02:03 (1758808923)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.10361 s, 17.2 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-ffff920bd050e800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.2146
Iter 1/10: OSS cache speed: 2.36583
Iter 1/10: ladvise speed: 2.40473
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.23633
Iter 2/10: OSS cache speed: 2.47069
Iter 2/10: ladvise speed: 2.44219
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.28881
Iter 3/10: OSS cache speed: 2.41994
Iter 3/10: ladvise speed: 2.46807
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.3385
Iter 4/10: OSS cache speed: 2.51728
Iter 4/10: ladvise speed: 2.53666
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.31176
Iter 5/10: OSS cache speed: 2.42062
Iter 5/10: ladvise speed: 2.47497
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.23448
Iter 6/10: OSS cache speed: 2.34183
Iter 6/10: ladvise speed: 2.45391
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.05007
Iter 7/10: OSS cache speed: 2.04755
Iter 7/10: ladvise speed: 2.37696
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.34382
Iter 8/10: OSS cache speed: 2.2796
Iter 8/10: ladvise speed: 1.90533
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.23923
Iter 9/10: OSS cache speed: 0.697019
Iter 9/10: ladvise speed: 0.792569
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.626515
Iter 10/10: OSS cache speed: 0.649998
Iter 10/10: ladvise speed: 0.71395
Average uncached read: 2.08
Average speedup with OSS cached read:  2.02 = +-2%
Average speedup with ladvise willread:  2.05 = +-1%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0