== sanity test 255a: check 'lfs ladvise -a willread' ===== 03:50:57 (1785397857)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 19.4389 s, 5.4 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-ffff9ebf585ce800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.223434
Iter 1/10: OSS cache speed: 0.233577
Iter 1/10: ladvise speed: 0.205254
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.195616
Iter 2/10: OSS cache speed: 0.213764
Iter 2/10: ladvise speed: 0.26117
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.239822
Iter 3/10: OSS cache speed: 0.238891
Iter 3/10: ladvise speed: 0.232117
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.218816
Iter 4/10: OSS cache speed: 0.23272
Iter 4/10: ladvise speed: 0.220743
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.180774
Iter 5/10: OSS cache speed: 0.204492
Iter 5/10: ladvise speed: 0.227157
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.232986
Iter 6/10: OSS cache speed: 0.237427
Iter 6/10: ladvise speed: 0.255132
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.2369
Iter 7/10: OSS cache speed: 0.278697
Iter 7/10: ladvise speed: 0.262068
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.231625
Iter 8/10: OSS cache speed: 0.2062
Iter 8/10: ladvise speed: 0.275471
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.228667
Iter 9/10: OSS cache speed: 0.254365
Iter 9/10: ladvise speed: 0.231174
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.227079
Iter 10/10: OSS cache speed: 0.223587
Iter 10/10: ladvise speed: 0.253606
Average uncached read: .22
Average speedup with OSS cached read:  .23 = +4%
Average speedup with ladvise willread:  .24 = +9%
Speedup with OSS cached read less than 20%,  got 4%. Skipping ladvise willread check.
fail_loc=0