Originally posted by ksec
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Glibc 2.29 Is Offering Up Some Nice Performance Improvements
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Originally posted by Michael View PostHave the ISO but unfortunately no repo access unless having a RHEL subscriber account.
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Originally posted by xiando View Post
Have you tried asking for one? You're the leading Linux publication. Not giving media free access to test and review products and services would be stupid, even IBM/RedHat should get that. They will probably give you access if you ask. If they don't then you might as well declare them dead to you and never mention their products again.
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For the NPB EP benchmark it is easy to see where the improvement comes from: the loop is as follows:
do 140 i = 1, nk
x1 = 2.d0 * x(2*i-1) - 1.d0
x2 = 2.d0 * x(2*i) - 1.d0
t1 = x1 ** 2 + x2 ** 2
if (t1 .le. 1.d0) then
t2 = sqrt(-2.d0 * log(t1) / t1)
t3 = (x1 * t2)
t4 = (x2 * t2)
l = max(abs(t3), abs(t4))
q(l) = q(l) + 1.d0
sx = sx + t3
sy = sy + t4
endif
140 continue
which contains a "log" which was optimized in glibc 2.29.
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Originally posted by Spam View Post
Any issues?
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Originally posted by FireBurn View Post
Not that I've noticed, I really need to do a whole system recompile though to figure that out. I don't think there have been any random header changes this version, so hopefully build breakages will be kept to a minimum - I think GCC 9 is due out soon, so I'll do it then
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