== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 14:04:55 (1763492695)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.6321 s, 9.0 MB/s
llite.lustre-ffff9aae50ad4000.read_ahead_stats=clear
llite.lustre-ffff9aae50ad4000.read_ahead_stats=
snapshot_time             1763492730.163757357 secs.nsecs
start_time                1763492714.075705227 secs.nsecs
elapsed_time              16.088052130 secs.nsecs
hits                      25370 samples [pages]
misses                    230 samples [pages]
zero_size_window          106 samples [pages]
failed_to_reach_end       1 samples [pages]
failed_to_fast_read       230 samples [pages]
mmap_range_read           225 samples [pages]
readahead_pages           225 samples [pages] 8 128 25370
/usr/bin/fio
thp                     : Memory Advise Huge Page
read_test: (g=0): rw=read, bs=(R) 1024KiB-1024KiB, (W) 1024KiB-1024KiB, (T) 1024KiB-1024KiB, ioengine=mmap, iodepth=1
fio-3.19
Starting 1 process

read_test: (groupid=0, jobs=1): err= 0: pid=225063: Tue Nov 18 14:16:31 2025
  read: IOPS=7, BW=8043KiB/s (8236kB/s)(5120MiB/651864msec)
    clat (msec): min=17, max=524, avg=126.53, stdev=61.62
     lat (msec): min=17, max=524, avg=126.53, stdev=61.62
    clat percentiles (msec):
     |  1.00th=[   53],  5.00th=[   61], 10.00th=[   65], 20.00th=[   70],
     | 30.00th=[   81], 40.00th=[   99], 50.00th=[  118], 60.00th=[  131],
     | 70.00th=[  146], 80.00th=[  171], 90.00th=[  209], 95.00th=[  243],
     | 99.00th=[  330], 99.50th=[  355], 99.90th=[  435], 99.95th=[  460],
     | 99.99th=[  527]
   bw (  KiB/s): min= 1848, max=18432, per=100.00%, avg=8113.21, stdev=3718.74, samples=1283
   iops        : min=    1, max=   18, avg= 7.32, stdev= 3.77, samples=1283
  lat (msec)   : 20=0.02%, 50=0.21%, 100=40.72%, 250=54.59%, 500=4.43%
  lat (msec)   : 750=0.02%
  cpu          : usr=0.45%, sys=39.77%, ctx=24010, majf=7154, minf=1303836
  IO depths    : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     submit    : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     complete  : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     issued rwts: total=5120,0,0,0 short=0,0,0,0 dropped=0,0,0,0
     latency   : target=0, window=0, percentile=100.00%, depth=1

Run status group 0 (all jobs):
   READ: bw=8043KiB/s (8236kB/s), 8043KiB/s-8043KiB/s (8236kB/s-8236kB/s), io=5120MiB (5369MB), run=651864-651864msec