== sanity test 255a: check 'lfs ladvise -a willread' ===== 10:08:52 (1753366132)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.05243 s, 17.3 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-ffff98394937e800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.35428
Iter 1/10: OSS cache speed: 1.36463
Iter 1/10: ladvise speed: 1.74866
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.84784
Iter 2/10: OSS cache speed: 2.01419
Iter 2/10: ladvise speed: 1.83238
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.07663
Iter 3/10: OSS cache speed: 0.765087
Iter 3/10: ladvise speed: 0.737453
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.954839
Iter 4/10: OSS cache speed: 1.13047
Iter 4/10: ladvise speed: 1.54851
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.36029
Iter 5/10: OSS cache speed: 1.81629
Iter 5/10: ladvise speed: 1.57661
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.71742
Iter 6/10: OSS cache speed: 1.79222
Iter 6/10: ladvise speed: 1.88681
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.0687
Iter 7/10: OSS cache speed: 1.99194
Iter 7/10: ladvise speed: 2.02051
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.01857
Iter 8/10: OSS cache speed: 1.96103
Iter 8/10: ladvise speed: 1.12494
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.46061
Iter 9/10: OSS cache speed: 1.71641
Iter 9/10: ladvise speed: 1.73424
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.77481
Iter 10/10: OSS cache speed: 1.6524
Iter 10/10: ladvise speed: 1.59902
Average uncached read: 1.66
Average speedup with OSS cached read:  1.62 = +-2%
Average speedup with ladvise willread:  1.58 = +-4%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0