== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:46:45 (1779205605)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.0575 s, 7.5 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-ffff88c3c3621000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.267464
Iter 1/10: OSS cache speed: 0.272541
Iter 1/10: ladvise speed: 0.258544
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.248457
Iter 2/10: OSS cache speed: 0.228719
Iter 2/10: ladvise speed: 0.275396
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.278818
Iter 3/10: OSS cache speed: 0.28029
Iter 3/10: ladvise speed: 0.249489
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.249969
Iter 4/10: OSS cache speed: 0.257573
Iter 4/10: ladvise speed: 0.306674
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.296415
Iter 5/10: OSS cache speed: 0.277148
Iter 5/10: ladvise speed: 0.261523
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.289739
Iter 6/10: OSS cache speed: 0.250816
Iter 6/10: ladvise speed: 0.30121
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.271911
Iter 7/10: OSS cache speed: 0.326727
Iter 7/10: ladvise speed: 0.303147
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.272714
Iter 8/10: OSS cache speed: 0.290617
Iter 8/10: ladvise speed: 0.272008
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.265937
Iter 9/10: OSS cache speed: 0.27631
Iter 9/10: ladvise speed: 0.269139
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.251834
Iter 10/10: OSS cache speed: 0.294549
Iter 10/10: ladvise speed: 0.276745
Average uncached read: .26
Average speedup with OSS cached read:  .27 = +3%
Average speedup with ladvise willread:  .27 = +3%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0