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...gt; with the pass disabled. > > > > > I'm guessing that the AArch64CollectLOH-pass information and a linker > > that makes use of that information could affect the profitability of > > the GlobalMerge pass? > > It could, and does, from what I've seen (beware anecdata): > - reusing the adrp base prevents optimizing it (the various > Adrp*{ldr,str} LOHs). > - reusing the adrp+add MergedGlobal pointer, with indexed addressing, > doesn't prevent the AdrpAdd optimization. > > All in all, whether GlobalMerge is profitable or not (by increasing &...

...>> >> > >> > I'm guessing that the AArch64CollectLOH-pass information and a linker >> > that makes use of that information could affect the profitability of >> > the GlobalMerge pass? >> >> It could, and does, from what I've seen (beware anecdata): >> - reusing the adrp base prevents optimizing it (the various >> Adrp*{ldr,str} LOHs). >> - reusing the adrp+add MergedGlobal pointer, with indexed addressing, >> doesn't prevent the AdrpAdd optimization. >> >> All in all, whether GlobalMerge is profitable...

...owever, I'm mostly running tests with the pass disabled. > > I'm guessing that the AArch64CollectLOH-pass information and a linker > that makes use of that information could affect the profitability of > the GlobalMerge pass? It could, and does, from what I've seen (beware anecdata): - reusing the adrp base prevents optimizing it (the various Adrp*{ldr,str} LOHs). - reusing the adrp+add MergedGlobal pointer, with indexed addressing, doesn't prevent the AdrpAdd optimization. All in all, whether GlobalMerge is profitable or not (by increasing register pressure, or adding a...

...hronicity problem but I think this may be a theory vs reality problem. In theory they should all fail at once, in reality at least for the arrays I have used for 3 years, they seem to fail in different times. that said, I only have 3 systems over 3 years with SSD drives running RAID6 so I only have anecdata versus data. > Any thoughts? > > best regards > Michael Schumacher > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > https://lists.centos.org/mailman/listinfo/centos > -- Stephen J Smoogen.

hi, I am planning to replace my old CentOS 6 mail server soon. Most details are quite obvious and do not need to be changed, but the old system was running on spinning discs and this is certainly not the best option for todays mail servers. With spinning discs, HW-RAID6 was the way to go to increase reliability and speed. Today, I get the feeling, that traditional RAID is not the best option for

Hi Ahmed, Did you run these experiments on a platform with a linker that makes use of the AArch64CollectLOH-pass-produced information? I'm guessing that the AArch64CollectLOH-pass information and a linker that makes use of that information could affect the profitability of the GlobalMerge pass? Thanks, Kristof > -----Original Message----- > From: llvmdev-bounces at cs.uiuc.edu

...t; >> > I'm guessing that the AArch64CollectLOH-pass information and a linker > >> > that makes use of that information could affect the profitability of > >> > the GlobalMerge pass? > >> > >> It could, and does, from what I've seen (beware anecdata): > >> - reusing the adrp base prevents optimizing it (the various > >> Adrp*{ldr,str} LOHs). > >> - reusing the adrp+add MergedGlobal pointer, with indexed addressing, > >> doesn't prevent the AdrpAdd optimization. > >> > >> All in all, whe...