== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 12:53:21 (1777568001)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.00154 s, 21.0 MB/s
llite.lustre-ffff9f764670f800.read_ahead_stats=clear
llite.lustre-ffff9f764670f800.read_ahead_stats=
snapshot_time             1777568016.341101939 secs.nsecs
start_time                1777568008.245070316 secs.nsecs
elapsed_time              8.096031623 secs.nsecs
hits                      25370 samples [pages]
misses                    230 samples [pages]
zero_size_window          4 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=238032: Thu Apr 30 13:01:38 2026
  read: IOPS=10, BW=10.7MiB/s (11.2MB/s)(5120MiB/479562msec)
    clat (msec): min=46, max=305, avg=93.47, stdev=31.94
     lat (msec): min=46, max=305, avg=93.47, stdev=31.94
    clat percentiles (msec):
     |  1.00th=[   54],  5.00th=[   59], 10.00th=[   64], 20.00th=[   69],
     | 30.00th=[   74], 40.00th=[   79], 50.00th=[   84], 60.00th=[   91],
     | 70.00th=[  101], 80.00th=[  115], 90.00th=[  140], 95.00th=[  157],
     | 99.00th=[  199], 99.50th=[  224], 99.90th=[  268], 99.95th=[  300],
     | 99.99th=[  305]
   bw (  KiB/s): min= 2035, max=18432, per=100.00%, avg=10962.16, stdev=3232.87, samples=954
   iops        : min=    1, max=   18, avg=10.30, stdev= 3.33, samples=954
  lat (msec)   : 50=0.18%, 100=69.90%, 250=29.73%, 500=0.20%
  cpu          : usr=0.56%, sys=65.54%, ctx=17119, majf=5322, minf=1305668
  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=10.7MiB/s (11.2MB/s), 10.7MiB/s-10.7MiB/s (11.2MB/s-11.2MB/s), io=5120MiB (5369MB), run=479562-479562msec