== sanity test 255a: check 'lfs ladvise -a willread' ===== 23:24:25 (1763353465)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.23088 s, 16.8 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-ffff915998a45000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.063
Iter 1/10: OSS cache speed: 1.30779
Iter 1/10: ladvise speed: 1.20792
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.60774
Iter 2/10: OSS cache speed: 1.87537
Iter 2/10: ladvise speed: 1.73007
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.95176
Iter 3/10: OSS cache speed: 1.91669
Iter 3/10: ladvise speed: 2.00173
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.09705
Iter 4/10: OSS cache speed: 2.07461
Iter 4/10: ladvise speed: 2.01678
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.0044
Iter 5/10: OSS cache speed: 2.07596
Iter 5/10: ladvise speed: 2.07456
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.22686
Iter 6/10: OSS cache speed: 2.18608
Iter 6/10: ladvise speed: 2.06417
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.08617
Iter 7/10: OSS cache speed: 2.13538
Iter 7/10: ladvise speed: 2.04612
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.06528
Iter 8/10: OSS cache speed: 2.07647
Iter 8/10: ladvise speed: 2.05755
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.14338
Iter 9/10: OSS cache speed: 2.11175
Iter 9/10: ladvise speed: 2.06179
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.10482
Iter 10/10: OSS cache speed: 2.10356
Iter 10/10: ladvise speed: 2.14191
Average uncached read: 1.93
Average speedup with OSS cached read:  1.98 = +2%
Average speedup with ladvise willread:  1.94 = +0%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0