ping... On 10/22/2014 09:52 AM, "Zhou, Wenjian/???" wrote: > On 10/17/2014 11:50 AM, Atsushi Kumagai wrote: >> Hello, >> >> The code looks good to me, thanks Zhou. >> Now, I have a question on performance. >> >>> The issue is discussed at http://lists.infradead.org/pipermail/kexec/2014-March/011289.html >>> >>> This patch implements the idea of 2-pass algorhythm with smaller memory to manage splitblock table. >>> Exactly the algorhythm is still 3-pass,but the time of second pass is much shorter. >>> The tables below show the performence with different size of cyclic-buffer and splitblock. >>> The test is executed on the machine having 128G memory. >>> >>> the value is total time (including first pass and second pass). >>> the value in brackets is the time of second pass. >> >> Do you have any idea why the time of second pass is much larger when >> the splitblock-size is 2G ? I worry about the scalability. >> > Hello, > > Since the previous machine can't be used for some reasons,I test several times using latest code > in others, but that never happened. It seems that all things are right. Tests are executed in two machines(server,pc). > Tests are based on: > test1: > machine: server > crashkernel: 512M > vmcore: /proc/vmcore (128G) > > > test2: > machine: pc > crashkernel: 256M > vmcore: vmcore dumped from the server > > test3: > machine: pc > crashkernel: 128M > vmcore: vmcore dumped from the server > > > > test1: > sec > cyc-buf 2 4 8 16 32 64 > splblk-size > 2M 1.53(0.00) 1.24(0.00) 1.08(0.01) 0.99(0.01) 0.95(0.01) 0.95(0.04) > 4M 1.52(0.00) 1.24(0.00) 1.08(0.01) 0.99(0.01) 0.95(0.01) 0.96(0.04) > 8M 1.53(0.00) 1.23(0.00) 1.08(0.01) 0.99(0.01) 0.95(0.01) 0.95(0.04) > 16M 1.53(0.00) 1.24(0.00) 1.08(0.01) 1.00(0.01) 0.94(0.01) 0.96(0.04) > 32M 1.52(0.00) 1.25(0.00) 1.08(0.01) 0.99(0.01) 0.94(0.01) 0.96(0.05) > 64M 1.52(0.00) 1.23(0.00) 1.07(0.01) 0.99(0.01) 0.97(0.01) 0.96(0.05) > 128M 1.54(0.01) 1.25(0.01) 1.08(0.01) 0.99(0.01) 0.96(0.02) 0.96(0.05) > 256M 1.53(0.01) 1.25(0.01) 1.08(0.01) 0.99(0.01) 0.95(0.02) 0.96(0.05) > 512M 1.53(0.01) 1.25(0.01) 1.07(0.01) 1.01(0.02) 0.95(0.02) 0.96(0.05) > 1G 1.54(0.02) 1.25(0.02) 1.08(0.02) 1.00(0.02) 0.96(0.03) 0.97(0.06) > 2G 1.59(0.07) 1.30(0.06) 1.11(0.05) 1.04(0.06) 1.00(0.07) 0.98(0.07) > 4G 1.60(0.08) 1.31(0.07) 1.14(0.07) 1.05(0.07) 1.02(0.08) 1.00(0.08) > 8G 1.60(0.08) 1.31(0.07) 1.14(0.07) 1.05(0.07) 1.02(0.08) 0.99(0.08) > 16G 1.60(0.08) 1.30(0.07) 1.14(0.07) 1.05(0.07) 1.02(0.08) 0.99(0.08) > > cyc-buf 128 256 512 1024 2048 4096 > splblk-size > 2M 0.95(0.04) 0.94(0.04) 0.94(0.04) 0.95(0.05) 0.94(0.05) 1.68(0.78) > 4M 0.95(0.04) 0.94(0.04) 0.94(0.04) 0.95(0.05) 0.94(0.05) 1.67(0.78) > 8M 0.94(0.04) 0.94(0.04) 0.94(0.04) 0.95(0.05) 0.95(0.05) 1.68(0.78) > 16M 0.96(0.05) 0.94(0.04) 0.95(0.05) 0.94(0.04) 0.94(0.05) 1.68(0.78) > 32M 0.95(0.05) 0.94(0.05) 0.94(0.05) 0.94(0.05) 0.94(0.05) 1.68(0.78) > 64M 0.96(0.05) 0.95(0.05) 0.94(0.05) 0.94(0.05) 0.95(0.05) 1.67(0.78) > 128M 0.96(0.05) 0.95(0.05) 0.95(0.05) 0.95(0.05) 0.94(0.05) 1.67(0.78) > 256M 0.95(0.05) 0.95(0.05) 0.95(0.05) 0.94(0.05) 0.94(0.05) 1.67(0.78) > 512M 0.96(0.05) 0.95(0.05) 0.94(0.05) 0.94(0.05) 0.95(0.05) 1.68(0.79) > 1G 0.96(0.06) 0.96(0.06) 0.97(0.06) 0.96(0.06) 0.96(0.07) 1.69(0.80) > 2G 0.97(0.07) 0.97(0.07) 0.97(0.07) 0.96(0.07) 0.96(0.07) 1.70(0.80) > 4G 1.02(0.10) 1.00(0.10) 0.99(0.10) 1.00(0.10) 0.99(0.10) 1.74(0.84) > 8G 1.00(0.10) 1.06(0.16) 1.05(0.16) 1.05(0.16) 1.06(0.16) 1.78(0.89) > 16G 1.00(0.10) 1.06(0.16) 1.16(0.26) 1.16(0.26) 1.15(0.26) 1.90(1.00) > > > > > test2: > sec > cyc-buf 2 4 8 16 32 64 > splblk-size > 2M 23.42(0.03) 23.38(0.05) 23.46(0.11) 23.56(0.17) 23.56(0.23) 23.84(0.48) > 4M 23.35(0.03) 23.35(0.05) 23.56(0.11) 23.51(0.17) 23.60(0.22) 23.81(0.48) > 8M 23.34(0.03) 23.38(0.05) 23.46(0.11) 23.55(0.16) 23.58(0.22) 23.84(0.48) > 16M 23.39(0.03) 23.36(0.06) 23.42(0.11) 23.50(0.16) 23.59(0.23) 23.86(0.48) > 32M 23.43(0.03) 23.38(0.06) 23.47(0.12) 23.54(0.19) 23.58(0.23) 23.89(0.48) > 64M 23.42(0.04) 23.43(0.07) 23.47(0.12) 23.53(0.18) 23.59(0.23) 23.87(0.48) > 128M 23.45(0.07) 23.41(0.09) 23.52(0.14) 23.56(0.19) 23.59(0.23) 23.81(0.48) > 256M 23.47(0.12) 23.48(0.14) 23.50(0.14) 23.55(0.20) 23.62(0.23) 23.84(0.48) > 512M 23.48(0.18) 23.56(0.19) 23.55(0.19) 23.60(0.24) 23.71(0.32) 23.88(0.49) > 1G 23.74(0.30) 23.53(0.23) 23.64(0.31) 23.54(0.24) 23.65(0.27) 23.98(0.52) > 2G 23.78(0.48) 23.82(0.48) 23.84(0.48) 23.83(0.49) 23.89(0.52) 23.84(0.52) > 4G 23.91(0.52) 23.81(0.50) 23.92(0.50) 23.87(0.51) 23.88(0.54) 23.92(0.54) > 8G 23.80(0.50) 23.90(0.52) 23.82(0.49) 23.84(0.51) 23.90(0.54) 23.90(0.54) > 16G 23.85(0.51) 23.86(0.50) 23.85(0.51) 23.87(0.51) 23.95(0.54) 23.88(0.54) > > cyc-buf 128 256 512 1024 2048 4096 > splblk-size > 2M 23.90(0.47) 23.84(0.48) 23.84(0.48) 24.06(0.47) 23.93(0.47) 49.00(25.46) > 4M 23.87(0.48) 23.84(0.48) 23.91(0.48) 23.93(0.47) 23.98(0.47) 49.00(25.46) > 8M 23.80(0.48) 23.81(0.48) 23.95(0.48) 23.95(0.47) 24.03(0.52) 49.05(25.45) > 16M 23.86(0.47) 23.84(0.48) 23.90(0.48) 23.93(0.47) 24.00(0.47) 48.95(25.41) > 32M 23.86(0.48) 23.82(0.48) 23.98(0.54) 23.99(0.47) 23.97(0.47) 49.03(25.47) > 64M 23.83(0.48) 23.79(0.48) 23.89(0.48) 24.02(0.47) 23.93(0.47) 48.96(25.49) > 128M 23.92(0.55) 23.91(0.48) 23.85(0.48) 23.98(0.47) 23.90(0.47) 48.98(25.50) > 256M 23.86(0.48) 23.88(0.48) 24.00(0.48) 24.17(0.47) 23.94(0.47) 49.01(25.50) > 512M 23.85(0.49) 23.89(0.55) 23.93(0.49) 23.91(0.48) 24.01(0.48) 49.12(25.54) > 1G 23.85(0.52) 23.84(0.52) 23.98(0.52) 23.98(0.51) 24.02(0.51) 49.28(25.73) > 2G 23.92(0.52) 23.87(0.52) 23.93(0.52) 24.11(0.52) 24.04(0.52) 49.27(25.77) > 4G 24.24(0.91) 24.31(0.91) 24.29(0.91) 24.37(0.90) 24.37(0.90) 50.01(26.49) > 8G 24.27(0.91) 24.94(1.61) 25.07(1.62) 25.11(1.60) 25.02(1.60) 51.24(27.77) > 16G 24.29(0.91) 24.98(1.63) 29.32(5.85) 29.34(5.83) 29.33(5.83) 53.91(30.43) > > > > > test3: > sec > cyc-buf 2 4 8 16 32 64 > splblk-size > 2M 23.34(0.03) 23.38(0.05) 23.46(0.11) 23.47(0.16) 23.55(0.22) 23.97(0.65) > 4M 23.38(0.03) 23.41(0.05) 23.46(0.11) 23.47(0.16) 23.56(0.22) 23.99(0.65) > 8M 23.33(0.03) 23.41(0.06) 23.50(0.11) 23.52(0.16) 23.54(0.23) 24.05(0.66) > 16M 23.38(0.03) 23.51(0.14) 23.46(0.12) 23.54(0.16) 23.57(0.23) 23.98(0.65) > 32M 23.34(0.03) 23.37(0.06) 23.47(0.12) 23.53(0.18) 23.56(0.23) 24.06(0.66) > 64M 23.36(0.06) 23.43(0.08) 23.52(0.13) 23.53(0.18) 23.63(0.23) 23.99(0.66) > 128M 23.47(0.07) 23.40(0.09) 23.54(0.15) 23.50(0.19) 23.57(0.23) 24.15(0.74) > 256M 23.48(0.13) 23.52(0.14) 23.50(0.15) 23.54(0.19) 23.56(0.23) 23.98(0.66) > 512M 23.49(0.18) 23.49(0.19) 23.60(0.20) 23.66(0.32) 23.64(0.23) 24.15(0.75) > 1G 23.58(0.23) 23.54(0.23) 23.62(0.24) 23.57(0.24) 23.64(0.27) 24.17(0.81) > 2G 24.00(0.65) 23.99(0.66) 24.01(0.67) 24.01(0.70) 24.13(0.80) 24.43(0.82) > 4G 24.04(0.66) 23.97(0.67) 24.05(0.71) 24.04(0.73) 24.15(0.82) 24.18(0.83) > 8G 23.97(0.66) 24.06(0.67) 23.98(0.68) 24.07(0.73) 24.13(0.81) 24.16(0.83) > 16G 24.05(0.66) 24.03(0.68) 24.02(0.68) 24.08(0.72) 24.18(0.82) 24.16(0.83) > > cyc-buf 128 256 512 1024 2048 4096 > splblk-size > 2M 24.05(0.65) 24.04(0.65) 24.58(0.65) 24.15(0.64) 24.14(0.64) 49.05(25.46) > 4M 23.98(0.65) 24.01(0.65) 24.29(0.65) 24.20(0.64) 24.18(0.66) 49.04(25.46) > 8M 24.02(0.65) 24.03(0.65) 24.25(0.65) 24.26(0.70) 24.15(0.64) 48.98(25.44) > 16M 24.01(0.65) 24.01(0.65) 24.30(0.65) 24.19(0.64) 24.12(0.65) 48.99(25.45) > 32M 23.97(0.65) 24.06(0.73) 24.23(0.65) 24.17(0.64) 24.19(0.64) 48.97(25.50) > 64M 24.06(0.66) 24.07(0.66) 24.27(0.66) 24.16(0.65) 24.17(0.65) 48.98(25.49) > 128M 24.03(0.67) 24.00(0.67) 24.27(0.66) 24.22(0.66) 24.19(0.66) 48.98(25.48) > 256M 24.12(0.67) 23.99(0.67) 24.27(0.67) 24.17(0.66) 24.12(0.66) 49.04(25.49) > 512M 24.06(0.70) 24.08(0.70) 24.26(0.70) 24.14(0.71) 24.19(0.70) 49.13(25.64) > 1G 24.20(0.82) 24.13(0.81) 24.36(0.81) 24.31(0.80) 24.33(0.81) 49.28(25.75) > 2G 24.19(0.81) 24.22(0.81) 24.37(0.81) 24.29(0.80) 24.28(0.82) 49.30(25.78) > 4G 25.29(1.90) 25.26(1.91) 25.49(1.91) 25.41(1.89) 25.50(1.90) 49.99(26.45) > 8G 25.33(1.90) 26.60(3.23) 26.87(3.21) 26.71(3.23) 26.64(3.22) 51.27(27.73) > 16G 25.28(1.90) 26.52(3.21) 29.47(5.86) 29.34(5.84) 29.38(5.86) 53.99(30.40) > > > > Thanks > Zhou Wenjian > > _______________________________________________ > kexec mailing list > kexec at lists.infradead.org > http://lists.infradead.org/mailman/listinfo/kexec
