== sanity test 255a: check 'lfs ladvise -a willread' ===== 18:51:44 (1787784704)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.1155 s, 8.7 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-ffff894ed08ee000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.301411
Iter 1/10: OSS cache speed: 0.344635
Iter 1/10: ladvise speed: 0.328619
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.375319
Iter 2/10: OSS cache speed: 0.359726
Iter 2/10: ladvise speed: 0.294761
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.358264
Iter 3/10: OSS cache speed: 0.310018
Iter 3/10: ladvise speed: 0.288635
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.307375
Iter 4/10: OSS cache speed: 0.334097
Iter 4/10: ladvise speed: 0.341743
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.334611
Iter 5/10: OSS cache speed: 0.308354
Iter 5/10: ladvise speed: 0.319691
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.339884
Iter 6/10: OSS cache speed: 0.334301
Iter 6/10: ladvise speed: 0.351196
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.400889
Iter 7/10: OSS cache speed: 0.355482
Iter 7/10: ladvise speed: 0.331482
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.340604
Iter 8/10: OSS cache speed: 0.383702
Iter 8/10: ladvise speed: 0.373511
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.353193
Iter 9/10: OSS cache speed: 0.330135
Iter 9/10: ladvise speed: 0.349608
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.363978
Iter 10/10: OSS cache speed: 0.375992
Iter 10/10: ladvise speed: 0.35905
Average uncached read: .34
Average speedup with OSS cached read:  .34 = +0%
Average speedup with ladvise willread:  .33 = +-2%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0