== sanity test 255a: check 'lfs ladvise -a willread' ===== 17:54:03 (1786830843)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.1328 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-ffff8ab9202f5000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.36113
Iter 1/10: OSS cache speed: 0.476519
Iter 1/10: ladvise speed: 0.389928
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.483705
Iter 2/10: OSS cache speed: 0.49953
Iter 2/10: ladvise speed: 0.507237
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.463042
Iter 3/10: OSS cache speed: 0.471523
Iter 3/10: ladvise speed: 0.511082
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.486214
Iter 4/10: OSS cache speed: 0.501953
Iter 4/10: ladvise speed: 0.499907
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.414418
Iter 5/10: OSS cache speed: 0.495214
Iter 5/10: ladvise speed: 0.456237
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.485989
Iter 6/10: OSS cache speed: 0.512794
Iter 6/10: ladvise speed: 0.466236
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.459371
Iter 7/10: OSS cache speed: 0.508622
Iter 7/10: ladvise speed: 0.504841
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.491492
Iter 8/10: OSS cache speed: 0.468866
Iter 8/10: ladvise speed: 0.486715
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.454711
Iter 9/10: OSS cache speed: 0.487708
Iter 9/10: ladvise speed: 0.461305
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.48949
Iter 10/10: OSS cache speed: 0.489969
Iter 10/10: ladvise speed: 0.420818
Average uncached read: .45
Average speedup with OSS cached read:  .49 = +8%
Average speedup with ladvise willread:  .47 = +4%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0