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From 2f38664f81e1877f81b16ed327b540d69d175a5b Mon Sep 17 00:00:00 2001
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Message-Id: <2f38664f81e1877f81b16ed327b540d69d175a5b.1566225007.git.aquini@redhat.com>
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In-Reply-To: <d42f467a923dfc09309acb7a83b42e3285fbd8f4.1566225007.git.aquini@redhat.com>
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References: <d42f467a923dfc09309acb7a83b42e3285fbd8f4.1566225007.git.aquini@redhat.com>
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From: Sandipan Das <sandipan@linux.ibm.com>
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Date: Thu, 15 Aug 2019 13:08:31 +0530
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Subject: [RHEL7 PATCH 04/31] tests: task-size-overrun: Make test faster on
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powerpc64
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As of now, powerpc64 supports 64TB, 128TB, 512TB, 1PB, 2PB and
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4PB user address space sizes with 4TB being the default for the
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newer kernels. With the relatively conservative increments that
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this test uses to find the task size, it takes a very long time
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but this can be made faster by also increasing the increment
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factor in steps of the different supported task sizes.
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Fixes: 02df38e ("Defined task size value to be 512T if it is more that 64Tb.")
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Signed-off-by: Sandipan Das <sandipan@linux.ibm.com>
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Signed-off-by: Eric B Munson <emunson@mgebm.net>
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Signed-off-by: Rafael Aquini <aquini@redhat.com>
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---
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tests/task-size-overrun.c | 14 ++++++++++++--
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1 file changed, 12 insertions(+), 2 deletions(-)
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diff --git a/tests/task-size-overrun.c b/tests/task-size-overrun.c
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index dc9ce0e..914ef65 100644
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--- a/tests/task-size-overrun.c
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+++ b/tests/task-size-overrun.c
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@@ -83,8 +83,18 @@ static unsigned long find_task_size(void)
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munmap(p, getpagesize());
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addr += getpagesize();
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#if defined(__powerpc64__)
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- if (addr > (1UL << 46) && addr < (1UL << 49))
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- addr = 1UL << 49;
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+ if (addr > (1UL << 46) && addr < (1UL << 47))
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+ addr = 1UL << 47; /* 64TB */
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+ else if (addr > (1UL << 47) && addr < (1UL << 48))
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+ addr = 1UL << 48; /* 128TB */
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+ else if (addr > (1UL << 48) && addr < (1UL << 49))
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+ addr = 1UL << 49; /* 512TB */
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+ else if (addr > (1UL << 49) && addr < (1UL << 50))
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+ addr = 1UL << 50; /* 1PB */
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+ else if (addr > (1UL << 50) && addr < (1UL << 51))
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+ addr = 1UL << 51; /* 2PB */
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+ else if (addr > (1UL << 51) && addr < (1UL << 52))
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+ addr = 1UL << 52; /* 4PB */
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#endif
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#if defined(__s390x__)
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if (addr > (1UL << 42) && addr < (1UL << 53))
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--
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1.8.3.1
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