== sanity test 255a: check 'lfs ladvise -a willread' ===== 13:44:29 (1726854269)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 3.42489 s, 30.6 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-ffff8800af254800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.02285
Iter 1/10: OSS cache speed: 0.931172
Iter 1/10: ladvise speed: 1.1862
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.07979
Iter 2/10: OSS cache speed: 1.1274
Iter 2/10: ladvise speed: 1.60713
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.24819
Iter 3/10: OSS cache speed: 1.27293
Iter 3/10: ladvise speed: 1.64153
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.11515
Iter 4/10: OSS cache speed: 1.2306
Iter 4/10: ladvise speed: 1.07996
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.36538
Iter 5/10: OSS cache speed: 1.80405
Iter 5/10: ladvise speed: 1.956
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.22852
Iter 6/10: OSS cache speed: 2.57166
Iter 6/10: ladvise speed: 2.76163
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.57453
Iter 7/10: OSS cache speed: 2.5266
Iter 7/10: ladvise speed: 2.4488
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.23371
Iter 8/10: OSS cache speed: 2.52968
Iter 8/10: ladvise speed: 2.86249
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.47951
Iter 9/10: OSS cache speed: 2.47754
Iter 9/10: ladvise speed: 2.40636
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.65868
Iter 10/10: OSS cache speed: 2.52935
Iter 10/10: ladvise speed: 2.51213
Average uncached read: 1.80
Average speedup with OSS cached read: 1.90 = +5.55%
Average speedup with ladvise willread: 2.04 = +13.33%
Speedup with OSS cached read less than 20%, got 5.55%. Skipping ladvise willread check.
fail_loc=0